Senior ISSE Security Engineer - DoD, STIGs & Automation

C5T Corporation; Glenview (IL); On-site; USD 120,000 - 180,000; Full time

Job summary

C5T Corporation is seeking an ISSE SME in O'Fallon, IL to serve as the top technical authority on security engineering, STIG compliance, and vulnerability management. You will define engineering standards, advise leadership, and shape remediation strategies while mentoring the ISSE team.

The role focuses on driving automation, implementing modern tooling, and overseeing enterprise security programs across DoD/federal environments. Strong DoD/STIG background required.

Qualifications

• Active clearance (TS preferred)
• 10+ years of security engineering experience in DoD or federal environments
• Expert proficiency across STIGviewer, SCAP, Tenable SC, Tenable Cloud Security, and CyberArk PAM
• Mastery of DoD STIG processes, NIST SP 800-53r5 technical controls, and vulnerability management frameworks
• Demonstrated experience leading enterprise-level security engineering programs
• Proven track record mentoring and leading security engineering teams

Responsibilities

• Provide SME-level guidance across all security engineering disciplines
• Define and govern security configuration baselines across the system portfolio
• Lead complex SIA efforts for high-risk or enterprise-level changes
• Oversee vulnerability management strategy and drive enterprise remediation programs
• Optimize CyberArk PAM architecture and privileged access governance
• Lead Tenable SC and Tenable Cloud Security program strategy and reporting
• Develop engineering standards, templates, and technical documentation frameworks
• Advise leadership on emerging threats, vulnerabilities, and mitigation strategies
• Mentor and technically develop the full ISSE team

Skills

Security engineering

DoD compliance

STIG/SCAP

Vulnerability management

Automation tooling

Education

Bachelor's degree in CS/Cybersecurity

Master's degree preferred

Tools

CyberArk PAM

Tenable SC

Tenable Cloud Security

STIGviewer

SCAP

Job description

C5T Corporation is seeking an ISSE SME in O'Fallon, IL to serve as the top technical authority on security engineering, STIG compliance, and vulnerability management. You will define engineering standards, advise leadership, and shape remediation strategies while mentoring the ISSE team.

The role focuses on driving automation, implementing modern tooling, and overseeing enterprise security programs across DoD/federal environments. Strong DoD/STIG background required.