Cybersecurity Engineer jobs in Chantilly hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $195,712/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
peraton.com • HQ: Reston, United States • Systems Integrators • Information Security • Homeland Security • National Security • 1001-5000 employees • Est. 2017 • Trust A • Hiring 921, 123 new
HQ: Reston, United States • Systems Integrators • Information Security • Homeland Security • National Security • 1001-5000 employees • Est. 2017 • Trust A • Hiring 921, 123 new
Peraton is an American national security and technology company that provides systems engineering, IT modernisation, cyber, space and communications services to defense, intelligence, homeland security, civil and health agencies of the US government. Formed in 2017 by Veritas Capital and enlarged in 2021 through the acquisitions of the federal IT and mission support business of Northrop Grumman and of Perspecta, it employs tens of thousands of people across the United States. The company is headquartered in Reston, Virginia, United States.
mantech.com • HQ: Herndon, United States • IT Consulting & Digital Transformation • Information Security • National Security • 1001-5000 employees • Est. 1968 • Trust A • Hiring 449, 80 new
HQ: Herndon, United States • IT Consulting & Digital Transformation • Information Security • National Security • 1001-5000 employees • Est. 1968 • Trust A • Hiring 449, 80 new
ManTech is a Virginia company founded in 1968 that provides technology services to United States defence and intelligence agencies. Its work covers cybersecurity, data analytics, cloud and mission systems engineering. The company employs thousands of cleared technologists.
amentum.com • HQ: Chantilly, United States • Military Logistics • Business Process Outsourcing (BPO) • Engineering Services • 5000+ employees • Est. 2020 • Trust B • Hiring 1063, 227 new
HQ: Chantilly, United States • Military Logistics • Business Process Outsourcing (BPO) • Engineering Services • 5000+ employees • Est. 2020 • Trust B • Hiring 1063, 227 new
Amentum is a US government and critical infrastructure services contractor headquartered in Chantilly, Virginia, providing engineering, technical, mission support and operations services in defense, intelligence, space, energy and environment markets. It has about 50,000 employees in more than 70 countries, is listed on the New York Stock Exchange, and absorbed PAE in 2022 before combining with the Jacobs critical mission solutions business in 2024. Openings include aerospace, GN&C and reliability engineers, aircraft workers, database administrators, software engineers, biometric enrollment specialists and paralegals.
accenturefederal.com • HQ: Arlington, United States • IT Consulting & Digital Transformation • Digital Government • 5000+ employees • Trust B • Hiring 562, 48 new
HQ: Arlington, United States • IT Consulting & Digital Transformation • Digital Government • 5000+ employees • Trust B • Hiring 562, 48 new
Accenture Federal Services is the US federal government business of the global professional services firm Accenture, providing technology, cloud, AI, data and cybersecurity services to defense, national security, public safety, civilian and military health agencies, headquartered in Arlington, Virginia, near Washington, DC. It operates as a wholly owned subsidiary of Accenture and employs more than 13,000 people. Its openings are mostly technical roles such as cloud services engineers, software engineering leads, solution architects, data engineers, CI/CD pipeline engineers, SharePoint specialists, system administrators, test engineers and user experience designers.
ardentprinciples.com • HQ: Chantilly, United States • IT Staffing & Staff Augmentation • AI Consulting & Integration • Data Engineering & Migration Services • Custom Software Development • 51-200 employees • Trust A • Hiring 24, 9 new
HQ: Chantilly, United States • IT Staffing & Staff Augmentation • AI Consulting & Integration • Data Engineering & Migration Services • Custom Software Development • 51-200 employees • Trust A • Hiring 24, 9 new
Ardent Principles is an American information technology services firm in the Washington DC area that offers data science, data engineering, software engineering, AI solutions, cybersecurity, staff augmentation and IT program management to its clients. It was founded by chief executive Robert McCauley, a Howard University computer science graduate with more than two decades in IT, and most of its openings are in Northern Virginia, chiefly Chantilly, McLean, Herndon and Reston. It hires software developers in Java, Spring Boot and ServiceNow, data scientists, machine learning and AI engineers, cloud, network and Linux engineers, cyber security engineers and systems architects.
att.com • HQ: Dallas, United States • Broadband • Mobile Networks • 5000+ employees • Est. 1885 • NYSE: T • Trust A • Hiring 1612, 249 new
HQ: Dallas, United States • Broadband • Mobile Networks • 5000+ employees • Est. 1885 • NYSE: T • Trust A • Hiring 1612, 249 new
AT&T is an American telecommunications company headquartered in Dallas, Texas, providing wireless, fiber broadband and business network services. It is one of the largest US wireless carriers and the country's largest fiber internet provider, trades on the New York Stock Exchange and runs a large retail, call center and field technician workforce alongside a government solutions unit. Current openings span retail and field sales, call center service, installation and network technicians, cleared government roles, supply chain, software, data and AI engineering, and internships at the Dallas campus.
caci.com • HQ: Reston, United States • Data & Analytics • Cybersecurity • Military • National Security • IT Consulting & Digital Transformation • Intelligence • Electronic Warfare • 5000+ employees • Est. 1962 • IT services • Trust D • Hiring 1864, 93 new
HQ: Reston, United States • Data & Analytics • Cybersecurity • Military • National Security • IT Consulting & Digital Transformation • Intelligence • Electronic Warfare • 5000+ employees • Est. 1962 • IT services • Trust D • Hiring 1864, 93 new
CACI International is an American technology company founded in 1962 that works almost entirely for United States defence, intelligence and federal civilian agencies. It has moved from being a conventional IT services contractor toward supplying its own technology, with a substantial expeditionary electronic warfare and signals intelligence product line, photonics and optical communications for space, and secure network modernisation. Headquartered in Reston, Virginia, the company employs more than twenty thousand people, the majority holding security clearances, and has grown through a steady programme of acquisitions that add differentiated technology rather than headcount alone.
$69k – $142k per year • Junior • 1+ year exp • In office (King of Prussia, Aurora, Chantilly, United States) • Bachelor's Degree • Full-Time • TS/SCI • Junior
aerospace.org • HQ: El Segundo, United States • National Security • Research Institutes • 1001-5000 employees • Est. 1960 • Trust B • Hiring 413, 66 new
HQ: El Segundo, United States • National Security • Research Institutes • 1001-5000 employees • Est. 1960 • Trust B • Hiring 413, 66 new
The Aerospace Corporation is a federally funded research centre supporting national security space programmes. Its engineers provide launch verification, systems engineering and mission assurance for government satellite projects. The organisation also researches orbital debris, resilient architectures and space policy.
boozallen.com • HQ: McLean, United States • Intelligence • Management Consulting • National Security • IT Consulting & Digital Transformation • 5000+ employees • Est. 1914 • IT services • Trust A • Hiring 1429, 105 new
HQ: McLean, United States • Intelligence • Management Consulting • National Security • IT Consulting & Digital Transformation • 5000+ employees • Est. 1914 • IT services • Trust A • Hiring 1429, 105 new
Booz Allen Hamilton is an American consulting firm founded in 1914 that has spent most of the past century working for the United States government, and today derives almost all of its revenue from federal clients. It supplies technology and mission services to defence, intelligence, civil and health agencies, covering systems engineering, cyber operations, data platforms and increasingly artificial intelligence deployed inside classified environments. Headquartered in McLean, Virginia and listed on the New York Stock Exchange, it employs tens of thousands of security-cleared staff and competes with the other large federal services contractors for multi-year programme awards.
j5consulting.co • HQ: Bowie, United States • Information Technology • IT Infrastructure & Networking Services • IT Consulting & Digital Transformation • 201-500 employees • Est. 2006 • Hiring 64
HQ: Bowie, United States • Information Technology • IT Infrastructure & Networking Services • IT Consulting & Digital Transformation • 201-500 employees • Est. 2006 • Hiring 64
Founded in 2006, J5 Consulting is an information technology and cybersecurity consulting firm headquartered in Bowie, Maryland. Drawing on extensive experience supporting federal government, defense, and commercial enterprises, the company delivers mission-critical IT modernization, enterprise architecture, and cyber defense solutions. Its core service offerings span governance, risk management, and compliance (GRC) audits aligned with NIST and CMMC frameworks, multi-cloud security engineering across AWS and Azure, vulnerability assessments, and continuous monitoring designed to safeguard sensitive assets and maintain regulatory compliance.
northropgrumman.com • HQ: Falls Church, United States • Space Defense • C4ISR • Satellite Manufacturing • Aerospace Manufacturing • Defense Manufacturing • 5000+ employees • Est. 1994 • Trust B • Hiring 2403, 317 new
HQ: Falls Church, United States • Space Defense • C4ISR • Satellite Manufacturing • Aerospace Manufacturing • Defense Manufacturing • 5000+ employees • Est. 1994 • Trust B • Hiring 2403, 317 new
Northrop Grumman is an American defence contractor whose oldest predecessor was founded in 1939, and which took its present form through the 1994 combination of Northrop and Grumman. It builds strategic systems including the B-21 Raider bomber and the Sentinel intercontinental ballistic missile programme, military and civil space systems, radars and electronic warfare equipment, autonomous aircraft, and mission systems and software for the United States armed forces and allied governments. Headquartered in Falls Church, Virginia and listed on the New York Stock Exchange, it earns the large majority of its revenue from the American government and employs close to one hundred thousand people.
$177k – $266k per year • Staff+ • 12+ years exp • In office (Chantilly, United States) • Relocation • High School Diploma • Full-Time • TS/SCI • Shift work • Citizenship or vetting required • Staff
$125k – $188k per year • Lead • 8+ years exp • In office (Chantilly, United States) • Relocation • Bachelor's Degree • Full-Time • TS/SCI • Shift work • Citizenship or vetting required • Principal
$125k – $188k per year • Lead • 2+ years exp • In office (Chantilly, United States) • Relocation • Bachelor's Degree • Full-Time • TS/SCI • Shift work • Citizenship or vetting required • Principal
ms2ic.com • HQ: Chantilly, United States • Est. 2019 • Hiring 13
HQ: Chantilly, United States • Est. 2019 • Hiring 13
MILLENNIAL SOFTWARE. From research and development to solution innovation, we're always looking for passionate problem-solvers who are driven by curiosity.
gdit.com • HQ: Falls Church, United States • Government • Military • Professional Services • National Security • Digital Government • IT Consulting & Digital Transformation • Systems Integrators • 5000+ employees • Est. 2006 • Trust A • Hiring 1821, 120 new
HQ: Falls Church, United States • Government • Military • Professional Services • National Security • Digital Government • IT Consulting & Digital Transformation • Systems Integrators • 5000+ employees • Est. 2006 • Trust A • Hiring 1821, 120 new
General Dynamics Information Technology, known as GDIT, is the technology services division of the defence contractor General Dynamics and one of the largest suppliers of IT to the United States federal government. It designs, builds and operates networks, cloud environments, cybersecurity and mission applications for defence, intelligence, homeland security and civilian agencies, work that requires a very large security-cleared workforce. The division roughly doubled in scale through the 2018 acquisition of CSRA, and has since concentrated on cloud migration, zero trust architecture and applying artificial intelligence inside accredited government environments.
markonsolutions.com • HQ: Falls Church, United States • Facilities Management • IT Consulting & Digital Transformation • Intelligence • 1001-5000 employees • Est. 2007 • Hiring 148, 2 new
HQ: Falls Church, United States • Facilities Management • IT Consulting & Digital Transformation • Intelligence • 1001-5000 employees • Est. 2007 • Hiring 148, 2 new
Markon Solutions is a government services contractor headquartered in Falls Church, Virginia, supporting the intelligence community, defense agencies and federal civilian customers with cyber, digital transformation, engineering and facilities management work. A repeated Washington Post Top Workplace, it staffs programs at Fort Meade, Annapolis Junction, Chantilly, McLean and Herndon, and supports naval nuclear work in West Mifflin and Niskayuna. Hiring covers software developers, systems and network engineers, data scientists, target analysts, civil, structural and electrical engineers, facility managers, space auditors and accountants.
saic.com • HQ: Reston, United States • Engineering Services • Digital Government • Systems Integrators • 5000+ employees • Est. 2013 • Trust B • Hiring 694, 137 new
HQ: Reston, United States • Engineering Services • Digital Government • Systems Integrators • 5000+ employees • Est. 2013 • Trust B • Hiring 694, 137 new
SAIC delivers technology integration and mission services to government agencies. Its work spans enterprise information technology, space systems, engineering and digital modernisation. The company is one of the largest federal services contractors.
acclaimtechnical.com • HQ: Reston, United States • Recruiting & Staffing • National Security • 51-200 employees • Est. 2000 • Hiring 68, 1 new
HQ: Reston, United States • Recruiting & Staffing • National Security • 51-200 employees • Est. 2000 • Hiring 68, 1 new
Acclaim Technical Services (ATS) is an employee-owned American government contractor headquartered in Reston, Virginia, providing cyber operations, intelligence, language, network infrastructure, engineering and enterprise IT services to the defense and intelligence communities. Founded in 2000 and owned through an employee stock ownership plan, it supports a range of US federal agencies with staff concentrated around Chantilly, Annapolis Junction, McLean and Bethesda. Its openings include AI and machine learning engineers, data scientists, full stack and software developers, system integrators and administrators, infrastructure engineers and UI and UX designers.
americansystems.com • HQ: McLean, United States • National Security • IT Consulting & Digital Transformation • Engineering Services • 51-200 employees • Est. 1975 • Hiring 169, 19 new
HQ: McLean, United States • National Security • IT Consulting & Digital Transformation • Engineering Services • 51-200 employees • Est. 1975 • Hiring 169, 19 new
American Systems is an employee-owned government services contractor headquartered in McLean, Virginia, delivering information technology, engineering and analysis, test and evaluation, and training services to national priority programs. Founded in 1975, it became a majority ESOP company in 1997 and fully employee-owned in 2015, works largely for US defense customers such as the Navy and NAVAIR, and has absorbed the contractor Epsilon. Its openings span aerospace and software engineers, cybersecurity analysts, network and systems administrators, mechanical designers and test engineers, many requiring security clearances.
chenega.com • HQ: Anchorage, United States • IT Consulting & Digital Transformation • Digital Government • 1001-5000 employees • Est. 1974 • Trust A • Hiring 213, 40 new
HQ: Anchorage, United States • IT Consulting & Digital Transformation • Digital Government • 1001-5000 employees • Est. 1974 • Trust A • Hiring 213, 40 new
Chenega is an Alaska Native Corporation headquartered in Anchorage, Alaska, whose family of subsidiaries provides professional, technical, intelligence, cyber, IT, logistics and facilities services mainly to US federal government customers. Its subsidiaries include Chenega Advanced Solutions and Intelligence Services and Chenega Naswik International, and its Military, Intelligence and Operations Support unit alone has over 1,700 employees supporting Department of Defense and other agency contracts. Openings in Huntsville, Washington and Anchorage include project managers, contract specialists, technicians, software developers and adjunct instructors.
lv8dsolutions.com • HQ: Aldie, United States • National Security • Engineering Services • Est. 2019 • Trust C • Hiring 15, 1 new
HQ: Aldie, United States • National Security • Engineering Services • Est. 2019 • Trust C • Hiring 15, 1 new
LV8D Solutions is a defense technology and engineering consulting firm that delivers specialized systems architecture and technical services for government and intelligence partners. Headquartered in Aldie, Virginia, the company offers expertise in cybersecurity, communications engineering, geospatial mapping, and space mission launch operations. By modernizing IT infrastructures and integrating complex digital systems, it empowers public sector clients to streamline critical processes and achieve high-priority mission objectives.
