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Defense, Government Contracting, Cybersecurity, IT Services, Aerospace, Healthcare Technology

Principal Cybersecurity Systems Engineer

Linthicum Heights, MDOnsiteFull TimePrincipal$154,050–$278,475 /yrPosted 19 days agoVisa sponsorship available

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Required skills

  • TS/SCI with Poly Clearance
  • System Engineering
  • Cybersecurity
  • Information Assurance
  • Cryptographic experience
  • team environment

Nice to have

  • Space System Engineering

Role summary

Leidos is seeking a Principal Cybersecurity Systems Engineer for a mission-critical program near Ft. Meade, MD. The role involves developing and evaluating system engineering documentation, including security requirements and testing documents. Responsibilities include providing technical support for complex hardware/software systems, performing cybersecurity high assurance evaluations, documenting security deficiencies, and recommending improvements. The position requires 20+ years of System Engineering experience, a Bachelor's degree (or equivalent experience), Information Assurance/Cryptographic experience, strong communication skills, and the ability to lead small teams. An active TS/SCI with Poly clearance is mandatory. Experience in space/weapon/ground/terminal systems and C&A processes is a plus.

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

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:

October 19, 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.

Sample Leidos interview questions

  • 1

    What are the key considerations when designing a highly available and consistent service registry?

    system designmedium
  • 2

    Buildings with an Ocean View Find all buildings that have an ocean view. Input: heights = [1,2,3,4] Output: [3] Explanation: Since the ocean is to the right, only the rightmost tallest building (index 3) is not blocked by any others.

    codingmedium
  • 3

    Merge K Sorted Linked Lists Merge K sorted linked lists. Input: lists = [[2,2,3],[1,5]] Output: [1,2,2,3,5] Explanation: Extracts the smallest current node iteratively using a priority queue to build a single merged and sorted linked list.

    codingmedium
  • 4

    Optimal Meeting Point Calculate the optimal meeting point for multiple people on a 2D grid. Input: grid = [[1,0],[0,1]] Output: 2 Explanation: The optimal meeting point is either (0,1) or (1,0), requiring exactly 1 step from each person resulting in a total distance of 2.

    codingmedium
  • 5

    Maximize the minimum distance between aggressive cows in stalls. Input: stalls = [0,4,3,7,10,9], cows = 3 Output: 4 Explanation: Placing the cows at positions 0, 4, and 10 yields a maximum possible minimum distance of 4 between any two cows.

    codingmedium

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