Principal Cybersecurity Systems Engineer

Are you seeking a new and challenging position supporting a complex, mission-critical Program? Well, look no further! Leidos is currently looking to add a Sr. Systems Engineer to an Information Assurance Program near Ft. Meade, MD. The successful candidate will participate in the development/evaluation of system engineering documentation, such as System Engineering Plans, Initial Capabilities Documents, Requirements Specifications, security requirements and security testing documents. Provide technical support for the development, engineering, interfacing, integration, and testing of specific components of complex hardware/software systems to include requirements elicitation, analysis and functional allocation, conducting systems requirements reviews, and performing technical/non-technical assessments. Support the planning and test analysis of the DoD Certification/Accreditation Process (as well as other Government Certification and Accreditation (C&A) processes).

Primary Responsibilities:

• Perform cybersecurity high assurance evaluation activities to include reviews of security evaluation documents and other high assurance artifacts/documents for devices undergoing certification and assessment, to ensure devices meet security requirements.
• Attend and participate in relevant security-related meetings and reviews in an effort to translate vulnerability knowledge into guidance to prevent and/or manage risk.
• Clearly document security deficiencies found in the evaluation of artifacts and documents.
• Recommend requirement clarification and process/template improvement to mitigate security concerns.

Qualifications:

• 20+ years of System Engineering experience Bachelor's Degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or related discipline from an accredited college or university is required.
• Five (5) years of additional SE experience may be substituted for a Bachelor's Degree.
• Information Assurance/Cryptographic experience Excellent written and verbal communication skills a must Ability to work in a team environment and lead small teams Active TS/SCI with Poly Clearance required

You Might Also Have:

• Experience in Space/Weapon/Ground/Terminal system development and or evaluation
• DoD Certification/Accreditation Process (as well as other Government Certification and Accreditation (C&A) processes.
• Experience in Space System Engineering conmd CABASAW

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 15, 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 $154,050.00 - $278,475.00 The Leidos pay range for this job level is a general guideline only and 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.

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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit

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 here.

Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to View email address on click.appcast.io.

Commitment and Diversity 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.