Senior Information Security Engineer (TS/SCI Poly)

Koitecc Solutions; Annapolis (MD); On-site; USD 131,300 - 237,350; Full time

Job summary

Leidos is seeking a Sr. Information System Security Engineer (ISSE) in the Intel Sector’s Cyber & Analytics Business Area. The role requires an active TS/SCI Polygraph.

Responsibilities span security design, risk management, and program-level assurance across distributed networks. Key duties include evaluating security architectures, coordinating with program managers and customer teams, and guiding security testing and continuous monitoring.

Qualifications

• Bachelor's degree required with 12+ years of relevant experience or equivalent
• Solid understanding of security practices, policies and vulnerability testing
• Experience applying Risk Management Framework (RMF) and IT security policy formulation
• Experience with common security tools (Nessus, NMAP, Wireshark) and secure configurations
• Comfort working on multiple systems and strong communication skills

Responsibilities

• Validate and design security for large-scale systems and distributed components
• Identify security architectures and ensure uniform policy application
• Develop technical security solutions and standards
• Assess threats and risks across the program life cycle
• Lead risk management, certification and awareness activities
• Collaborate with internal experts and communicate security concerns to managers

Skills

Security best practices

Vulnerability testing

Risk Management Framework

Communication

Task prioritization

Education

Bachelor's degree in Computer Science / Information Assurance / related field

Tools

Nessus

NMAP

Wireshark

Job description

Leidos is seeking a Sr. Information System Security Engineer (ISSE) in the Intel Sector’s Cyber & Analytics Business Area. The role requires an active TS/SCI Polygraph.

Responsibilities span security design, risk management, and program-level assurance across distributed networks. Key duties include evaluating security architectures, coordinating with program managers and customer teams, and guiding security testing and continuous monitoring.