Security Engineer Jobs in Chantilly, VA
Security Engineer jobs in Chantilly, Virginia are concentrated in the defense and intelligence corridor along Route 28 and surrounding the Dulles Tech Center, driven by federal contracting, cybersecurity, and cloud infrastructure demand. Employers hiring right now include MANTECH, VTG Defense, and Peraton. Scan the live roles below and apply to whichever ones fit.
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L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.
L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.
Job Title: Information Security Systems Engineer (ISSE)
Job Code: 44525
Job Location: Chantilly, VA
Job Schedule: 5/8 Monday - Friday
Job Description:
The successful candidate will support a highly motivated engineering team in defining, designing, implementing, documenting, testing and sustaining security solutions on National Security Systems, or other systems engineered for our government customers, using current standards within National Institute of Standards & Technology (NIST) Risk Management Framework, Special Publications 800-37, 800-53, 800-171, and other NIST publications; Committee on National Security Systems Instruction (CNNSI) 1253, Joint SAP Implementation Guide (JSIG), and Federal Information Processing Standards (FIPS) to certify and achieve system accreditations. The successful candidate will work with system developers or commercial product vendors in the design and evaluation of state-of-the-art secure systems, networks, and database products, using methods such as encryption technology, vulnerability analysis and security management.
Essential Functions:
Perform incident response cyber threat identification, incident response support, defensive cyber operations coordination, malware analysis, supply chain risk management assessments per NIST SP 800-161, vendor provenance, counterfeit detection- Exercise skills in NIST Risk Management Framework (RMF) and all related NIST publications, to include writing System Security Plans, Security Control Traceability Matrix, Continuous Monitoring Plan, Security Assessment Plans & Procedures, Security Concept of Operations, Plan of Action and Milestones
- Perform skills in implementing/assessing security controls, to include writing system security categorization memorandum, recommending appropriate security control overlays, define security control baseline based on defined system security categorization and approved security overlays, and apply security controls to computing/network nodes and verify implementation of security controls
- Assist in systems/software engineering functions, to include creation of data flow diagrams, interface control documents, perform trade studies, and Static Application Security Testing (SAST) for Application Security and Development Secure Technical Implementation Guide (STIG) compliance using tools such as Fortify/Coverity and Gitlab as part of a DevSecOps Continuous Integration/Continuous Deployment (CI/CD) Pipeline, and generation of summary reports
- Define/manage systems/security architectures including system security boundaries, vulnerability management and risk mitigation and remediation strategies within networks, systems, applications and new technology initiatives (hardware, software, firewalls, intrusion detection systems, anti-virus systems and software deployment tools); and Infrastructure/Platform/Software-as-a-Service (IaaS/PaaS/Saas) implementations in cloud environments
- Define/manage systems/security architectures including system security boundaries in on-premises data center systems and ultimately deploy to secure cloud-based system, to include configuration and use of defense and assessment tools specific to each environment type
- This position is performed 100% onsite and cannot be performed remotely
Qualifications:
MUST have an active Top Secret/SCI security clearance with ability to obtain and maintain Special Access Program (SAP) clearance after hire- Bachelor’s Degree and a minimum of 6 years of prior relevant experience; Or, Graduate Degree and a minimum of 4 years of prior related experience; Or, in lieu of a degree, minimum of 10 years of prior related experience
- DoD 8140.03 Level 3 or 4 certification
Preferred Additional Skills:
Perform Model Based System Engineering (UML, SysML, UAF)- Confugure/operate vulnerability analysis tools such Tenable NESSUS Security products
- Develop dashboards, configure rules and operate/administer SEIM/audit reduction tools (e.g., Splunk)
In compliance with pay transparency requirements, the salary range for this role in Virginia state is $106,500-$197,500. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements.
#LI-CG1
L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.
Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.
By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.
L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish.
See All 261+ Security Engineer Jobs in Chantilly
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Find Security Engineer JobsSecurity Engineer Job Market in Chantilly
Who's Hiring
- MANTECH45

- VTG Defense45

- Peraton18

- J5 Consulting18

- CACI International18

Top Industries Hiring
- Technology & Software
Security Engineer Jobs in Chantilly: Frequently Asked Questions
How do I get a security engineer job in Chantilly?
Focus your search on the federal contracting and defense technology firms clustered along the Route 28 corridor and near Dulles International Airport. Clearance-eligible candidates have a distinct edge here, as many Chantilly employers require active Secret or Top Secret clearances for security engineering roles. Targeting mid-size government contractors and intelligence-community integrators gives you the best odds in this market.
Which companies hire security engineers in Chantilly?
Employers hiring security engineers in Chantilly right now include MANTECH, VTG Defense, and Peraton, based on current listings on Migrate Mate as of September 2026. The local market is dominated by defense primes, federal IT contractors, and intelligence-focused technology firms that support government agencies in and around Northern Virginia.
Are there remote security engineer jobs in Chantilly?
Yes, though roles tied to classified systems or on-site federal facilities are predominantly on-site. About 0% of security engineer openings tied to Chantilly are remote or hybrid as of September 2026, reflecting flexibility mainly in commercial cybersecurity and cloud security positions. Roles supporting unclassified commercial clients tend to offer the most remote flexibility in this market.
How can I get a security engineer job in Chantilly with little or no experience?
The most realistic entry path in Chantilly is through junior security analyst or IT support roles at smaller federal contractors, which often develop talent internally toward engineering responsibilities. Obtaining a security clearance early, even at the Secret level, significantly expands which Chantilly employers will consider you. Entry-level helpdesk, network operations, and SOC analyst positions at local contractors are common stepping stones into security engineering here.
Which industries hire the most security engineers in Chantilly?
Most security engineer openings in Chantilly sit in Technology & Software, per current listings on Migrate Mate as of September 2026. Chantilly's proximity to federal agencies, intelligence community campuses, and Dulles-area technology parks makes it a hub for defense, cybersecurity services, and government IT contracting that consistently drives local hiring.
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