Senior Information Systems Security Engineer

Leidos • Columbia, MD

75d • $148,850 - $269,075

About The Position

Leidos has a new and exciting opportunity for a Senior Information Systems Security Engineer (ISSE) 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 4 or more weeks 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! This position is eligible for a 15k sign on bonus!

Requirements

• 14+ years of Information Security experience with a Bachelor's Degree in Computer Science, Information Assurance, or related field OR 18+ years of directly related information security experience without a degree.
• Active IASAE Level II certification (CISSP, CASP+ CE, or CSSLP).
• Clearance Requirement: Top Secret/SCI with Polygraph is required.

Nice To Haves

• Experience with AWS environments and cloud security integration.

Responsibilities

• Participate as the primary security engineering representative on teams designing, developing, implementing, and integrating secure networking, computing, and enclave systems.
• Conduct technical security assessments to identify vulnerabilities, ensure compliance with IA regulations, and recommend mitigation strategies.
• Apply knowledge of IA policies and RMF processes to support security planning, risk analysis, and authorization activities.
• Support the enforcement of trusted relationships across external systems and architectures, ensuring consistent application of agency security policies.
• Develop and validate system security requirements, contributing to secure system design and implementation across multiple enclaves and classification levels.
• Review certification and accreditation (C&A) documentation for completeness and compliance, providing expert feedback to stakeholders.
• Recommend system-level security solutions and contribute to the development of enterprise-wide security architectures.

Benefits

• 4 or more weeks 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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Industry: Professional, Scientific, and Technical Services
• Education Level: Bachelor's degree