Cybersecurity Engineer jobs in Chantilly hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $205,308/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
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mantech.com · HQ: Herndon, United States · IT Consulting & Digital Transformation · Information Security · National Security · 1001-5000 employees · Est. 1968 · Trust A · Hiring 474, 73 new
HQ: Herndon, United States · IT Consulting & Digital Transformation · Information Security · National Security · 1001-5000 employees · Est. 1968 · Trust A · Hiring 474, 73 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.
fantomcorp.com · HQ: Leesburg, United States · IT Infrastructure & Networking Services · IT Consulting & Digital Transformation · Trust B · Hiring 41, 9 new
HQ: Leesburg, United States · IT Infrastructure & Networking Services · IT Consulting & Digital Transformation · Trust B · Hiring 41, 9 new
Fantom Corporation is an American IT services contractor that supports federal, defence and intelligence community programmes as well as commercial clients. It provides network engineering, data architecture, cloud, software development and systems administration, with staff in Chantilly, Hanover and McLean. The company is headquartered in Leesburg, Virginia, United States.
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 1411, 97 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 1411, 97 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.
markonsolutions.com · HQ: Falls Church, United States · Facilities Management · IT Consulting & Digital Transformation · Intelligence · 1001-5000 employees · Est. 2007 · Hiring 167, 25 new
HQ: Falls Church, United States · Facilities Management · IT Consulting & Digital Transformation · Intelligence · 1001-5000 employees · Est. 2007 · Hiring 167, 25 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.
gci.tech · HQ: Reston, United States · Cyber Warfare · Intelligence · National Security · 1001-5000 employees · Est. 1989 · Trust B · Hiring 43, 4 new
HQ: Reston, United States · Cyber Warfare · Intelligence · National Security · 1001-5000 employees · Est. 1989 · Trust B · Hiring 43, 4 new
GCI is an American engineering and IT services company supporting national security and intelligence customers. Established in 1989, it provides data analytics, software development, cyber operations, targeting and analysis, operations and training, hiring cleared AI/ML engineers, software engineers and cyber analysts. The company is headquartered in Reston, Virginia, United States.
grvty.com · HQ: Tysons, United States · Intelligence · National Security · 1001-5000 employees · Est. 2025 · Trust B · Hiring 135, 10 new
HQ: Tysons, United States · Intelligence · National Security · 1001-5000 employees · Est. 2025 · Trust B · Hiring 135, 10 new
GRVTY is a US national security company that delivers mission and technical expertise in space, spectrum and cyber to defence and intelligence customers. Its programs involve software development on large-scale data platforms, GEOINT collection and analysis, signals intelligence training and vulnerability research, with work performed at customer sites such as Herndon and Springfield in Virginia and Annapolis Junction in Maryland. It hires cleared software engineers, big data analysts, Android and iOS developers, UI/UX developers, test and integration engineers, GEOINT analysts and technical training instructors, most roles requiring TS/SCI clearance.
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 26, 7 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 26, 7 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.
peraton.com · HQ: Reston, United States · Systems Integrators · Information Security · Homeland Security · National Security · 1001-5000 employees · Est. 2017 · Trust A · Hiring 983, 167 new
HQ: Reston, United States · Systems Integrators · Information Security · Homeland Security · National Security · 1001-5000 employees · Est. 2017 · Trust A · Hiring 983, 167 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.
amentum.com · HQ: Chantilly, United States · Military Logistics · Business Process Outsourcing (BPO) · Engineering Services · 5000+ employees · Est. 2020 · Trust B · Hiring 1535, 150 new
HQ: Chantilly, United States · Military Logistics · Business Process Outsourcing (BPO) · Engineering Services · 5000+ employees · Est. 2020 · Trust B · Hiring 1535, 150 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 574, 40 new
HQ: Arlington, United States · IT Consulting & Digital Transformation · Digital Government · 5000+ employees · Trust B · Hiring 574, 40 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.
boozallen.com · HQ: McLean, United States · Intelligence · Management Consulting · National Security · IT Consulting & Digital Transformation · 5000+ employees · Est. 1914 · IT services · Trust A · Hiring 1563, 137 new
HQ: McLean, United States · Intelligence · Management Consulting · National Security · IT Consulting & Digital Transformation · 5000+ employees · Est. 1914 · IT services · Trust A · Hiring 1563, 137 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.
aerospace.org · HQ: El Segundo, United States · National Security · Research Institutes · 1001-5000 employees · Est. 1960 · Trust B · Hiring 451, 49 new
HQ: El Segundo, United States · National Security · Research Institutes · 1001-5000 employees · Est. 1960 · Trust B · Hiring 451, 49 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.
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.
ga.com · HQ: San Diego, United States · Energy & Utilities · Nuclear Engineering · Nuclear Energy · Science & Engineering · 5000+ employees · Est. 1955 · Hiring 578, 73 new
HQ: San Diego, United States · Energy & Utilities · Nuclear Engineering · Nuclear Energy · Science & Engineering · 5000+ employees · Est. 1955 · Hiring 578, 73 new
Headquartered in San Diego, California, General Atomics is a prominent defense and diversified technologies corporation specializing in advanced aerospace and energy systems. The company develops and manufactures industry-defining remotely piloted aircraft, including the Predator and Reaper series, alongside electromagnetic aircraft launch systems and airborne surveillance technologies. It also remains a pioneer in high-energy physics, operating the largest magnetic fusion research facility in the United States and driving critical innovations in nuclear power.
northropgrumman.com · HQ: Falls Church, United States · Space Defense · C4ISR · Satellite Manufacturing · Aerospace Manufacturing · Defense Manufacturing · 5000+ employees · Est. 1994 · Trust B · Hiring 2903, 356 new
HQ: Falls Church, United States · Space Defense · C4ISR · Satellite Manufacturing · Aerospace Manufacturing · Defense Manufacturing · 5000+ employees · Est. 1994 · Trust B · Hiring 2903, 356 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 · 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 12
HQ: Chantilly, United States · Est. 2019 · Hiring 12
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 958, 125 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 958, 125 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.
saic.com · HQ: Reston, United States · Engineering Services · Digital Government · Systems Integrators · 5000+ employees · Est. 2013 · Trust B · Hiring 754, 81 new
HQ: Reston, United States · Engineering Services · Digital Government · Systems Integrators · 5000+ employees · Est. 2013 · Trust B · Hiring 754, 81 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 70, 2 new
HQ: Reston, United States · Recruiting & Staffing · National Security · 51-200 employees · Est. 2000 · Hiring 70, 2 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.
