Information Security Systems Engineer

Leidos has a new and exciting opportunity for a Sr. Information Systems Security Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA).  Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.  Join us and make a difference in National Security! 

Primary Responsibilities:

The ISSE shall perform, or review, technical security assessments of computing environments to identify points of vulnerability, non-compliance with established IA standards and regulations and recommended mitigation strategies. This includes:

• Validates and verifies system security requirements definitions and analysis and establishes system security design
• Designs, develops, implements and/or integrates IA and security systems and system components including those for networking, computing and enclave environment to include those with multiple enclaves and with differing data protection/classification requirements
• Builds IA into systems deployed to operation environments
• Assist architects and systems developers in the identification and implementation of appropriate information security functionality to ensure uniform application of Agency security policy and enterprise solutions
• Supports the building of security architectures
• Enforces the design and implementation of trusted relations among external systems and architecture
• Assesses and mitigates system security threats/risk throughout the program life cycle
• Contributes to the security planning, assessment, risk analysis, risk management, certification and awareness activities for system and networking operations
• Reviews C&A documentation, providing feedback on completeness and compliance of its content

CLEARANCE REQUIRED: Minimum TS/SCI with ability to obtain Polygraph.

Qualifications

• Bachelor’s degree from an accredited university ideally in Computer Science, Information Assurance, Information Security System Engineering or related field with a minimum of 15+ years of experience as an Information Systems Security Engineer (ISSE) or Network Engineer on programs and/or contracts with the customer space
• CASP OR CISSP a firm requirement
• CISSP-ISSEP DoD approved 8570 baseline certification is a firm requirement for Level III
• Strong writing skills
• Experience developing and documenting system security requirements and conducting requirements gap analysis. 
• Knowledge of, and practical experience with the NIST Special Publications 800 Series, CNSSI 1253, and DoD 8500.
•  Experience with network technologies and the ability to demonstrate knowledge of network protocols, communications systems and architectures

Original Posting:

April 28, 2025

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 $148,850.00 - $269,075.00

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.