Senior Security Engineer (TS/SCI Polygraph)

Leidos Inc; Corridor North (MD); On-site; USD 154,000 - 278,000; Full time

Benefits offered by this job

Competitive benefits

PTO & Holidays

401K with company match

Job summary

Leidos is seeking a Sr. Information System Security Engineer to join a high-performing agile team supporting a fast-paced, complex program. The role involves enhancing security architecture, managing RMF processes, cross-domain capabilities, and security verification testing of Type 1 devices.

The candidate will work with system engineering, test, and integration teams to ensure security requirements are met while advancing mission-focused cybersecurity capabilities and compliant operations.

Qualifications

• Solid understanding of security practices and policies.
• Hands-on vulnerability testing experience.
• Experience applying Risk Management Framework (RMF).
• Formulating IT security policies and standards.

Responsibilities

• Validate and design system security for large-scale, distributed environments.
• Lead security planning, risk analysis, and certification activities.
• Collaborate with engineers and program managers on security issues.

Skills

Security engineering

Vulnerability testing

RMF

Security architecture

Risk assessment & mitigation

Education

MS degree

Tools

Nessus

NMAP

Wireshark

Job description

Leidos is seeking a Sr. Information System Security Engineer to join a high-performing agile team supporting a fast-paced, complex program. The role involves enhancing security architecture, managing RMF processes, cross-domain capabilities, and security verification testing of Type 1 devices.

The candidate will work with system engineering, test, and integration teams to ensure security requirements are met while advancing mission-focused cybersecurity capabilities and compliant operations.