ARCFIELD COMPLETES ACQUISITION OF STRATEGIC TECHNOLOGY CONSULTING (STC) With expertise in full-spectrum model-based systems engineering (MBSE) and digital engineering services and solutions, the acquisition of STC enhances Arcfield’s next-generation systems engineering and integration capabilities with the scalability to support the increasing demand for MBSE across government agencies. LEARN MORE SUPPORT THE MISSION. SECURE THE NATION. Every day we play a critical role in securing the nation by providing government customers with unparalleled expertise, technology and commitment. Are you up for the challenge? EXPLORE CAREERS SETTING THE TRAJECTORY. FUELED BY INNOVATION. Arcfield was purpose-built to defend against the near-peer threat through innovations in systems engineering and integration, modeling, simulation and analysis, space and launch support, cybersecurity and test range support. LEARN MORE MISSION FIRST. MISSION UNIFIED. MISSIONS At Arcfield, we come together to support a single imperative—putting our customers’ missions first. Our team of experts are outside-the-box thinkers who challenge the status quo by delivering innovative solutions and exceptional service to ensure mission success. LEARN MORE INNOVATIONS We provide our mission partners with a technological advantage by delivering novel solutions to their most complex engineering, mathematical, aerospace and cybersecurity challenges. LEARN MORE CAREERS At Arcfield, we’re on a mission to build a team of the best and brightest engineers, analysts and IT specialists who are committed to putting our customers’ needs first. EXPLORE U.S. JOBS EXPLORE CANADA JOBS ARCFIELD CANADA For more than 35 years, Arcfield Canada has been a leading provider of high-value logistics and in-service support for avionics, C5ISR, electronic warfare and advanced systems. We are Canada’s only prime contractor for fighter platform avionics sustainment, delivering comprehensive in-service support for the full suite of fighter aircraft avionics and associated test equipment. LEARN MORE NEWSROOM Our newsroom is your go-to resource for the latest news, press releases, corporate information and industry news featuring Arcfield and our people. PRESS RELEASES IN THE NEWS ARCFIELD WEATHER Using radar and satellite imagery, Arcfield Weather provides six-day weather forecasts for the Washington, D.C., Philadelphia and New York City regions and reports on pending severe weather events that may impact our employees and customers. LEARN MORE

WORKING AT ARCFIELD At Arcfield, our team of engineers, analysts and IT specialists are united in putting our customers’ needs first—because the security of the nation is what’s at stake. Arcfield is the type of workplace where you feel good about the work you’re doing. We provide advanced solutions in systems engineering and integration, modeling, simulation and analysis, space and launch support, cybersecurity and test range support of our nation’s most critical missions. A TEAM OF TOP TALENT From your first day on the job, you’ll find a team you are proud to stand shoulder to shoulder with. We are innovative thinkers that challenge the status quo. Our people are hard at work engineering original, rapidly deployable solutions in advanced analytics, cybersecurity and systems integration that increase the speed of technology to mission. And we make sure that our people have the best tools available to do so. LEARN MORE ENJOY A FULL RANGE OF BENEFITS Arcfield offers a full suite of health care and insurance options to fit every lifestyle and encourages all employees to maintain a healthy work-life balance. We also provide professional learning tools and resources—from career paths and individual development plans to online, in-classroom and certification training programs—to propel your career. LEARN MORE DISCOVER YOUR NEW CAREER Our people make the difference, which is why we foster an environment where you can do your best work while helping our government customers achieve mission success. If you have a passion for technology and are driven by innovation and creativity, don’t wait—apply today. EXPLORE U.S. JOBS EXPLORE CANADA JOBS

Arcfield Appoints Janet Brewer as Chief People Officer and Jim Gallagher as Chief Legal Officer Arcfield announced today that it has named Janet Brewer as chief people officer (CPO) and Jim Gallagher as chief legal officer (CLO). CHANTILLY, Va., March 23, 2022— Arcfield announced today that it has named Janet Brewer as chief people officer (CPO) and Jim Gallagher as chief legal officer (CLO). In these roles, both Brewer and Gallagher will join the company’s executive leadership team and report directly to the company’s chief executive officer (CEO) and chairman, Kevin Kelly. Arcfield is a leading provider of innovative solutions in systems engineering and integration, C5ISR and digital transformation for air, sea, land, space and cyber domains in support of our nation’s most critical intelligence and defense missions. As CPO, Brewer heads the development and execution of Arcfield’s people-related initiatives including organizational development, talent acquisition, total rewards, employee experience and diversity, equity and inclusion. She is also responsible for internal and external marketing and communications activities to support Arcfield’s cultural transformation and advance the company’s strategic business imperatives. Brewer has more than 20 years of experience in global human resources, leading large teams and managing business transformation through integration and scaling for growth. As CLO, Gallagher serves as principal counsel and advisor to Arcfield’s senior leadership with responsibility for all legal, privacy, contracting, investment and compliance activities, as well as government and regulatory affairs. He brings more than 27 years of legal experience related to the government services industry to the company, having been involved in or led every facet of litigation including managing mergers, sales, transactions, integrations, handling disputes and crises, managing intellectual property and trademarking and assuring ethical and compliance standards are met. “In these early stages of standing up the organization, it is critical to have the right people in place to ensure our business practices and policies are sound and that we uphold the highest-level standards in everything we do,” said Kelly. “Equally important is the development of a company culture we can all be proud of and retains the top talent we have on aboard. As CPO and CLO, Janet and Jim will play a monumental role as we grow and evolve.” Before joining Arcfield, Brewer served as vice president of human resources at Peraton, where she was responsible for strategic human capital consulting and employee relations. She held a similar leadership role at Perspecta before the company was acquired by Peraton. Prior to that, Brewer took on various roles of increasing responsibility at SAP, including SAP Concur and SAP SuccessFactors, Freddie Mac, Experian and MicroStrategy. Before coming to Arcfield, Gallagher served as executive vice president, general counsel and secretary at Perspecta, where he was principal counsel to the company’s executive leadership team and board of directors. Preceding his tenure at Perspecta, he served as vice president and deputy general counsel for DXC Technology’s Enterprise Services group, vice president, associate general counsel for Hewlett Packard Enterprise and Hewlett Packard Company and senior counsel at the Washington, D.C. office of Pillsbury Winthrop, LLP. About Arcfield Arcfield is a leading provider of full lifecycle, mission-focused systems engineering and integration capabilities to the U.S. government and its allies. The company has more than 60 years of proven experience providing advanced engineering and analysis, IT and C5ISR capabilities to support our nation’s most critical national security missions. Headquartered in Chantilly, VA and with 16 offices around the world, Arcfield employs approximately 1,200 engineers, analysts, IT specialists, and other professionals who put our customers’ missions first, helping them solve their most complex challenges through innovations in modeling, simulation and analysis, digital transformation and C5ISR. Visit arcfield.com for more details. # # # Press Contact: Katerina Figurski Senior Director, Marketing Communications 571.508.2155 katerina.figurski@arcfield.com Previous Next Mar 23, 2022

KEVIN KELLY Chairman and Chief Executive Officer JOHN AVALOS Chief Growth Officer LORI BECKER Chief Financial Officer JANET BREWER Chief People Officer JIM GALLAGHER Chief Legal Officer STEVE HYDE GM, Space and Mission Engineering CHRIS MCCALL Chief Administrative Officer MARK THOMPSON GM, Global Defense and Security Solutions MIKE SMITH Chief Security Officer DANIEL REINEKE GM, Strategic Technology Consulting Our Leadership Our expert leadership team was built from the ground up and represents top talent from across government, technology and contracting. They were hand selected not only because we believe they’re the best at what they do, but for their unique ability to shape an exceptional organization and a collective vision of putting the mission first.

CONTACT ARCFIELD 14295 Park Meadow Dr. Chantilly, VA 20151 Contact Us First Name Email Last Name Phone Message SUBMIT Thank you! We will be in contact soon.

Arcfield Canada Announces Team Northern Sentry for Canada’s CF-18 Avionics In-Service Support Program Arcfield Canada Corp., a leading provider of mission sustainment solutions for the aerospace and defense industry, today announced the official launch of Team Northern Sentry for the Royal Canadian Air Force’s (RCAF) CF-18 fighter fleet. CALGARY, Alberta, May 04, 2023 – Arcfield Canada Corp., a leading provider of mission sustainment solutions for the aerospace and defence industry, today announced the official launch of Team Northern Sentry for the Royal Canadian Air Force’s (RCAF) CF-18 fighter fleet. Team members include Arcfield Canada, Raytheon Canada, L3Harris Technologies, Palitronica, and Terra Nova. Team Northern Sentry brings together leading Canadian defence, aerospace, and technology companies to provide a comprehensive sustainment solution for maintenance, repair and overhaul, engineering support services, cyber materiel assurance, supply chain management, logistics support analysis, and obsolescence management for the full suite of CF-18 avionics systems. “We are pleased to make the announcement today about Team Northern Sentry,” said Jacques Comtois, vice president of Arcfield Canada’s operations. “We believe that the expertise and proven capabilities of this team offers the greatest experience to Canada for continued operation and maintenance of the CF-18 fighter fleet.” As the prime contractor for the CF-18 Avionics Optimized Weapon System Support program, Arcfield Canada has a proven legacy in delivering reliable and effective in-service and integrated logistics support for the complete CF-18 avionics platform. Team Northern Sentry will complement this wealth of capability with industry leading partners ready to meet the challenges of ensuring mission success for Canada’s CF-18 fleet through the end of the aircraft’s anticipated service in 2032. The combined expertise and capabilities of the team members provides unmatched support ensuring reliable fleet availability. This will enable operational readiness to meet Canada’s domestic needs, while supporting its NATO and NORAD obligations. “For more than three decades, Arcfield Canada has demonstrated its ability to manage and meet performance targets,” said Kevin Kelly, chief executive officer and chairman of Arcfield. “We look forward to continuing our long-standing partnership with the RCAF and delivering cost-effective sustainment solutions for Canada’s CF-18 fighter fleet through an integrated team approach.” About Arcfield Canada Corp. Arcfield Canada has been a trusted partner to the Canadian Armed Forces for more than 35 years; supplying world-class in-service and integrated logistics support through its expertise in supply chain management, maintenance and repair, and engineering solutions. Arcfield Canada is an affiliate of Arcfield, a global defense and security solutions provider to the U.S. government and its allies. The company has more than 60 years of proven experience providing advanced engineering and analysis, and IT capabilities to support the most critical national security missions. With 16 offices around the world, Arcfield employs approximately 1,300 engineers, analysts, IT specialists, and other professionals who put our customers’ missions first, helping them solve their most complex challenges through innovations in modeling, simulation and analysis, and digital transformation. Visit arcfield.ca for more details. ### Press Contact: Deborah Lovegrove Arcfield Canada Sr. Manager, Marketing and Communications 613-818-5411 Deborah.lovegrove@arcfield.com Previous Next May 5, 2023

Arcfield Acquires Strategic Technology Consulting Combination with Arcfield creates a leader in model-based systems engineering CHANTILLY, Va., Aug. 8, 2023 — Arcfield, a leading government services and mission support provider, today announced that it has completed its acquisition of Strategic Technology Consulting, LLC (STC), a highly differentiated provider of full-spectrum model-based systems engineering (MBSE) and digital engineering services and solutions. Post closing, STC continues to serve its breadth of commercial and government customers as a subsidiary of Arcfield. STC’s comprehensive suite of offerings includes highly complex modeling methodologies, digital twins and software tools that enable next-generation technology development. STC’s expert team of consultants delivers products and services that rapidly accelerate MBSE adoption throughout the lifecycle of a development platform, from conceptual design to operations and maintenance support. “As a decades-long leader in MBSE and digital twins, Arcfield has invested heavily in the development, refinement and advancement of our digital engineering and MBSE capabilities to support our customers in their shift from traditional SE&I to an all-digital model,” said Kevin Kelly, chairman and chief executive officer of Arcfield. “The acquisition of STC strengthens the capabilities and resources we deliver to our customers. We look forward to welcoming the STC team to the Arcfield family.” “Throughout our history, we have been delivering differentiated digital engineering solutions to our customers, enabling reduced cost and improved quality of next-generation technology systems,” said Daniel Reineke, president of STC. “Arcfield’s position as a prime contractor, reputation as a trusted government partner, and mission-first culture make it the ideal home for our people, products and portfolio of services and will enable us to expand our reach into new customers, capabilities and markets.” Latham & Watkins LLP and Covington & Burling LLP served as counsel to Arcfield. STC was advised by Raymond James and represented by law firm Miles & Stockbridge P.C. About Arcfield Arcfield was purpose-built to protect the nation and its allies through innovations in systems engineering and integration, space and mission launch assurance, cybersecurity, and conventional and hypersonic missile support. Headquartered in Chantilly, VA with 16 global offices, Arcfield employs more than 1,300 engineers, analysts, IT specialists, and other professionals with more than 60 years of collective proven experience supporting missions in cyber and space defense, hypersonic and nuclear deterrence, and warfighter readiness. Visit arcfield.com for more details. About STC STC is an industry leading solutions provider in digital engineering and model-based systems engineering. The company’s offerings include MBSE-as-a-Service, integrated digital engineering environment (IDEE) deployments, training, and software. STC’s customer base includes an array of commercial industry customers, U.S. defense agencies and defense prime contractors. STC has more than 110 employees and is headquartered in Toms River, NJ. Visit stechnologyconsulting.com for more details. Press Contact: Katerina Figurski Senior Director, Marketing Communications 571.401.2155 katerina.figurski@arcfield.com Previous Next Aug 8, 2023

INSIGHTS Utilizing the MITRE ATT&CK Framework to Minimize Cyber Threats By John Meyer, VP, Cyber Products and Services The rise of the remote workforce, the expansion of 5G networks and the booming expansion of new tech into our organizations make cybersecurity more important now than ever before. ​ While companies continue to bolster their cybersecurity posture, cybercriminals are getting smarter and constantly innovating new ways to gain access and exfiltrate critical organizational data. It appears no matter how much training is provided, the everyday user within an organization may still represent the single largest network vulnerability. ​ In the new landscape, shared information is constantly moving across a distributed workforce and is touching a range of different technology, from on-prem networks to multi-cloud environments and even personal devices. As a result, the traditional approach of recognizing types of attacks and blocking them at the perimeter is far from sufficient to safeguard an enterprise. The sheer volume of attacks makes identifying every single threat nearly impossible, leaving organizations vulnerable. ​ For government agencies who are tasked with safeguarding sensitive information, a hardened IT security posture is critical to track suspicious behavior and prevent costly data breaches from critically impacting an enterprise’s operations. ​ Taking a page from the cybercriminals’ playbook ​ For federal agencies looking to stay ahead of the evolving cyber threat environment, utilizing established resources that deploy adaptive and proven tactics can help to safeguard their networks. ​ One such roadmap is the Mitre ATT&CK Framework. The ATT&CK Framework is an actively curated knowledge base of industry threat intelligence which outlines common tactics, approaches and platforms used by cybercriminals The framework is globally-accessible and used as a foundation for the development of specific threat models and methodologies across all industries – private, public and the cybersecurity product and service community. ​ Because of its widespread use and collaborative resource sharing, the framework emphasizes how important it is for enterprises to start monitoring adversary tactics and suspicious behavior in their data as it enters, circulates and exits its networks. ​ As cybersecurity has shifted its focus from defending the perimeter to protecting and monitoring data from attack, stronger cyber tools have emerged influenced by the Mitre ATT&CK framework to properly identify and remove these potential cyber threats from within their network. ​ Stopping cybercriminals from inside your network ​ With cyber strategy now shifting from simply trying to prevent intruders from network penetration to also identifying and thwarting their efforts post-breach, cyber leaders are actively pursuing software tools that can counter cybercriminal tactics like data exfiltration and malware-based attacks. ​ These tools adhere to the principles of the ATT&CK Framework by identifying where adversaries are attacking and how. Two solutions enterprises should add to their cyber toolbox are data loss prevention (DLP) and content disarm and reconstruction (CDR). These technologies, when integrated together and used to enhance both inbound and outbound cyber posture can significantly increase the effective catch and kill rate of potential threats entering and leaving their networks. ​ By actively deploying integrated DLP and CDR, enterprises can identify and mitigate potential harm from malware while ensuring the most critical enterprise data doesn’t leave in the hands of the attacker. ​ A major benefit of CDR is its ability to cleanse / reconstruct an infected file so that it can continue its journey to its destination in turn, increasing workflow efficiency. For example, CDR allows IT professionals to deactivate all active java script or malware in a -PDF file to produce a cleansed version of the file enabling it to reach its intended end user without disruption. On the other hand, should cybercriminals gain access to an organization’s systems via a technology breach, DLP can help stop the exfiltration of critical data by potentially catching malicious communications or attempts to access or move data within or outside an organization’s network. When paired together with traditional and non-traditional antivirus and other cyber protection software, integrated CDR and DLP can help mitigate cyberattacks without slowing down an enterprise’s normal operational workflows. By using technologies that can deliver integrated DLP and CDR, organizations can be proactive in efforts to reduce both their inbound and outbound cyber risk profiles. These capabilities not only help to make an organization more secure from active cyberthreats, but can also help an organization control costs by lowering their cyber liability insurance premiums. In a world where a variety of cloud-based operations have become the norm—creating increasingly complex IT environments—deploying technologies that can keep track of the file-based data coming into your networks, moving across your networks and exiting your networks is critical to ensuring the safety of your IT environment. ​ Want to learn more? Send us a note at contact@arcfield.com .

MARKETS WE SERVE At Arcfield, we know that nothing is more important to you than your mission. That’s why we’ve made it our top priority, too. For more than 60 years, we’ve been standing side by side with customers across defense, intelligence, space and civilian agencies to make sure their missions succeed. From systems on the ground to those in space, from the depths of the sea to the far reaches of cyberspace—we’re mission focused, and we’re ready. DEFENSE With core capabilities in hypersonic systems support, nuclear mission deterrence support, cross-domain solutions, defensive cyber tools and services, and avionics sustainment and supply chain management, our experienced team of engineers, scientists and analysts provide mission-essential support and services for defense programs. INTELLIGENCE Maintaining our national security requires adaptable capabilities and exceptional expertise. Arcfield supports a variety of technical operations and enabling services, systems and capabilities to bolster the success of critical missions across the Intelligence Community. SPACE Today’s space environment is increasingly more contested, populated and complex. That’s why space agencies need a partner that has seen it all. For more than six decades Arcfield has been supporting our nation’s space program from design to decommission and we know what it takes to maintain space superiority and resiliency. FEDERAL CIVILIAN We help federal civilian agencies enhance their security posture against network attacks and cyberthreats with security architecture, assessment support, vulnerability testing, incident response and security administration services.

MODEL-BASED SYSTEMS ENGINEERING (MBSE) In a rapidly evolving threat landscape, traditional document-intensive systems engineering methods can no longer keep up. As system complexity increases, costs to keep documentation current and integrated climb, the probability of errors grows, project timelines extend and hours engineers spend sifting through countless program documents rise when they should be doing what they do best: engineering. Leveraging MBSE to advance the mission Arcfield’s MBSE solution simplifies the dynamic challenges faced by our government customers, which means improved decision-making, greater accuracy, long-term cost savings, and most importantly, accelerated mission success. A proprietary approach to MBSE Arcfield’s digital engineering ecosystem—an integrated infrastructure of curated modeling, simulation and data visualization engineering tools—can generate a high-fidelity digital twin of a system with traceability spanning the entire engineering life cycle. With end-to-end project management from product definition and concept phases through production and disposal, we guarantee a single source of truth that reliably serves as an authoritative description of the system at any instance in the development process. An expert team Arcfield maintains a robust team of highly qualified modelers with OMG-Certified SysML Professional (OCSMP), AGI System Tool Kit (STK) and MathWorks MATLAB certifications and decades of proven systems engineering and integration (SE&I) experience. Our dedicated staff are available to work onsite with our government customers to provide hands-on digital engineering expertise and trusted mission support as an extension of their teams. Committed to the future of engineering Arcfield has invested in innovative solutions to make MBSE-driven digital engineering accessible to government stakeholders. With more than 64 years of experience providing SE&I services in support of our nation’s most critical space, defense and intelligence missions, we have instantiated a complete digital engineering ecosystem of integrated processes, technologies and data that can adapt to current and future system requirements. Digital Engineering Ecosystem Arcfield’s digital engineering ecosystem provides an integrated suite of modeling and simulation software that supports system requirements, design, analysis, verification, validation and data visualization across the entire system development life cycle. READ MORE Have questions? Send us an email! contact@arcfield.com

Arcfield Appoints Robert Gallegos as Chief Operating Officer and Chris McCall as Chief Administration Officer Arcfield announced today that Robert Gallegos and Chris McCall have joined the company as chief operating officer (COO) and chief administration officer (CAO), respectively. CHANTILLY, Va., February 24, 2022— Arcfield announced today that Robert Gallegos and Chris McCall have joined the company as chief operating officer (COO) and chief administration officer (CAO), respectively. As members of the company’s executive leadership team, both Gallegos and McCall will report directly to Kevin Kelly, chief executive officer (CEO) and chairman of Arcfield. Arcfield is a leading provider of innovative solutions in systems engineering and integration, C5ISR and digital transformation for air, sea, land, space and cyber domains in support of our nation’s most critical intelligence and defense missions. Gallegos and McCall were previously members of the LGS Innovations leadership team, who together with Kelly, led the company through its spin-off from Lucent Technologies and eventual acquisition by CACI International (CACI). As COO, Gallegos will oversee the day-to-day performance and management of Arcfield’s business sectors and will ensure the teams have the people, resources and tools necessary to meet and exceed customer expectations and mission needs. Gallegos’ prior roles include executive vice president of LGS Labs at CACI, COO at LGS Innovations, and leadership roles at three high-tech start-up organizations. As CAO, McCall will help plan, define and execute the corporate strategy for Arcfield with responsibility spanning three areas: business operations, investment management and strategic growth. Specifically, he will oversee the operations of corporate support functions, and lead proposal operations and corporate development. Prior to joining Arcfield, McCall served as the chief of staff for the national security and innovative solutions sector at CACI. Before that, he spent 11 years at LGS innovations serving in various roles of increasing responsibility, most recently as vice president of operations. “I am pleased that Robert and Chris have joined the leadership team at Arcfield,” said Kelly. “Their dedication to mission, innovation-first mindset, and proven experience and success serving intelligence and defense customers will be invaluable to Arcfield as we further establish our place in the market. I look forward to building on our already strong and established working relationship at Arcfield.” About Arcfield Arcfield is a leading provider of full lifecycle, mission-focused systems engineering and integration capabilities to the U.S. government and its allies. The company has more than 60 years of proven experience providing advanced engineering and analysis, IT and C5ISR capabilities to support our nation’s most critical national security missions. Headquartered in Chantilly, VA and with 16 offices around the world, Arcfield employs approximately 1,200 engineers, analysts, IT specialists, and other professionals who put our customers’ missions first, helping them solve their most complex challenges through innovations in modeling, simulation and analysis, digital transformation and C5ISR. Visit arcfield.com for more details. # # # Press Contact: Katerina Figurski Senior Director, Marketing Communications 571.508.2155 katerina.figurski@arcfield.com Previous Next Feb 24, 2022

Previous Next JIM GALLAGHER Chief Legal Officer As chief legal officer, Jim Gallagher serves as principal counsel and advisor to Arcfield’s senior leadership with responsibility for all legal, privacy, contracting, investment and compliance activities, as well as government and regulatory affairs. The Arcfield legal department is comprised of a variety of legal, contract and regulatory-related functions which all roll up under Jim’s purview, including the contracts department, ethics and compliance office, and export and trade compliance. Jim brings more than 27 years of legal experience related to the government services industry. Serving first as outside counsel to government contractors before transitioning to the corporate environment, Jim has been involved in or led every facet of litigation including managing mergers, sales, transactions, integrations, handling disputes and crises, managing intellectual property and trademarking and assuring ethical and compliance standards are met. He specializes in counseling and advising large government services and technology providers and is passionate about doing the right and practical thing. Jim previously served as executive vice president, general counsel and secretary at Perspecta, where he served as principal counsel to the company’s executive leadership team and board of directors and was responsible for all litigation, privacy, ethics, contracting, compliance, public company related activities. Prior to joining Perspecta, he served as vice president and deputy general counsel for DXC Technology’s Enterprise Services group, and vice president associate general counsel for Hewlett Packard Enterprise and Hewlett Packard Company. Previously, Jim engaged in trial and appellate practice in federal and state courts, and in administrative agencies, related to government contracts, government compliance and commercial disputes at the Washington D.C. Office of Pillsbury Winthrop, LLP. Jim received his Juris Doctor degree from the Georgetown University Law Center where he was a member of The Georgetown Immigration Journal. He received his bachelor's degree from the Catholic University of America.