Description
The Test and Training Enabling Architecture (TENA) program at Leidos is looking to add a Cyber Security Systems Engineer . Our mission is to develop tools for the United States Department of Defense test and training communities, to increase the speed of the development cycle, to get capabilities to the warfighter more rapidly. The Cyber Security Systems Engineer will work within a team of engineers, developers, and system administrators adding new capabilities to our enclaves, as well as ensuring the existing systems are secure and performing as intended.
This position is required to work on-site in our Alexandria, VA office.
Primary Responsibilities:
Coordinate with Cybersecurity personnel to conduct and review technical cybersecurity assessments.
Perform and maintain vulnerability scans and create reports.
Perform review and analysis of cybersecurity event logs.
Identify points of vulnerability and non-compliance with established cybersecurity standards and regulations.
Collaborate with our DevSecOps team.
Maintain Authorization to Operate (ATO) records.
Manage and report Plan of Actions and Milestones (POA&M) compliance.
Review certification and accreditation (C&A) documentation.
Perform system installation, configuration maintenance, account maintenance, signature maintenance, patch management, and troubleshooting of operational systems.
Apply system security engineering expertise.
Basic Qualifications:
US Citizen with at least an active DoD Secret clearance.
Bachelor's degree with 4+ years of experience or a Master's degree with 2+ years of experience. Additional experience may be considered in lieu of a degree.
At least one IAT Level 1 or 2 certification.
Experience developing and reviewing security systems security plans, security risk assessments, contingency plans, or configuration management plans.
Experience configuring, running, and analyzing vulnerability scans.
Experience with incident response plans, plan of actions and milestones, risk management plans, and vulnerability management plans.
Strong analytical, communication, problem solving, and interpersonal skills.
Experience establishing a System Security Engineering (SSE) management process to integrate security and privacy controls into complex hardware and software systems.
DoD Trellix system (ePo administration) on Linux systems.
DoD ACAS/Tenable-Nessus System.
Experience with STIGs on both Linux, Windows and other network equipment.
Familiar with IAVMs and vulnerability mitigation.
Preferred Qualifications:
4+ years DoD Trellix system user/admin experience (ePo administration) with Linux systems.
Experience of having installed and managed Tenable-Nessus Systems.
4+ years of experience with applying and monitoring STIGs on both Linux, Windows, and other network equipment.
Familiar with IAVMs and vulnerability mitigation processes and procedures working with/in a DoD organization.
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If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.
Original Posting:
July 28, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:
Pay Range $87,100.00 - $157,450.00
The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
About Leidos
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com .
Pay and Benefits
Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits .
Securing Your Data
Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com .
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission (https://reportfraud.ftc.gov/#/) .
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
REQNUMBER: R-00188282
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.
