IA/ISSE Engineer | TS/SCI | Equity & Learning Budget

VulnU; Suitland (MD); On-site; USD 108,000 - 195,000; Full time

Benefits offered by this job

Retirement match

Paid parental leave

Equity

Learning budget

Job summary

Leidos is seeking a hands-on Information Assurance Security Engineer (IASE)/ISSE to support a complex mission-driven environment in Suitland, MD. You will secure, administer, harden, and maintain critical systems while collaborating across network, systems, cybersecurity, and architecture teams to strengthen security posture.

Responsibilities include vulnerability remediation, security testing, architecture support, and ensuring compliance with STIGs/ SRGs across Unix and Windows environments.

Qualifications

• Active TS/SCI clearance required (DISS)
• Experience with DoD RMF, ICD 503, NIST RMF
• Experience with IC/DoD security processes and tools
• Experience in vulnerability assessment, ethical hacking, and penetration testing
• Experience hardening Unix and Windows systems to STIGs
• Software development experience in Java/C/C++ or scripting
• Knowledge of SCAP-based tools and specifications

Responsibilities

• Serve as primary security engineering resource for enterprise infrastructure
• Research and evaluate cybersecurity tools and methodologies
• Participate in architecture reviews and provide security recommendations
• Troubleshoot complex security issues across storage, network, OS
• Conduct vulnerability assessments and penetration testing
• Configure secure admin access and RBAC
• Develop and deliver cybersecurity training

Skills

Security engineering

Vulnerability remediation

RMF/DoD frameworks

Security testing

SSH/TLS/RBAC

Education

Bachelor’s degree (Cybersecurity / EE / IT / IA) with 8+ years

Master’s degree with 6+ years

Tools

Trellix/ESS

ACAS

RedSeal

STIG Manager

Evaluate STIG

SteelCloud ConfigOS

Job description

Leidos is seeking a hands-on Information Assurance Security Engineer (IASE)/ISSE to support a complex mission-driven environment in Suitland, MD. You will secure, administer, harden, and maintain critical systems while collaborating across network, systems, cybersecurity, and architecture teams to strengthen security posture.

Responsibilities include vulnerability remediation, security testing, architecture support, and ensuring compliance with STIGs/ SRGs across Unix and Windows environments.