Senior Systems Security Engineer (Secret Clearance)

Sierra Nevada Corporation; Lone Tree (CO); Hybrid; USD 108,000 - 149,000; Full time

Benefits offered by this job

Medical, dental, and vision plans

401(k) with 150% match up to 6%

Life insurance

3 weeks paid time off

Tuition reimbursement

Job summary

Sierra Nevada Corporation is seeking a Systems Security Engineer III to lead security design, implement, and maintain secure IT systems. You will drive high-level incident response and forensics while coordinating with engineering and product teams in a fast-paced environment.

The role requires comprehensive knowledge of cybersecurity principles, experience with NIST/ISO 27001, and a current active Secret U.S. Security Clearance. Hybrid work and travel may be involved as projects demand.

Qualifications

• Bachelor's degree in Systems Security, Network Engineering, Information Technology, or related Engineering discipline.
• 5+ years of experience in IT security or a related field.
• In the absence of a degree, a minimum of 9 years of related experience.
• Advanced understanding of cybersecurity principles and practices.
• Experience with security frameworks and standards such as NIST, ISO 27001.
• Current/Active Secret U.S. Security Clearance is required.

Responsibilities

• CI/CD Optimization & Process Automation: Collaborate with engineering teams to define and execute an automation roadmap, enhance CI/CD pipeline integration, and streamline build, patch, and release processes.
• Software Configuration Management & CCB Governance: Direct the SCM lifecycle—including facilitating the CCB, managing baseline changes, and controlling the release of baseline CSCIs, build artifacts, and supporting documentation (e.g., RMF packages, KBAs, scripts).
• Cross-Functional Collaboration: Partner with product management and developers to refine requirements, establish acceptance criteria, coordinate UAT, and drive quality early in the SDLC.

Skills

5+ years IT security experience

Security frameworks

Active Secret Clearance

Education

Bachelor's degree in Systems Security or related field

Tools

MCSE

Linux

CCNP Security

Job description

Sierra Nevada Corporation is seeking a Systems Security Engineer III to lead security design, implement, and maintain secure IT systems. You will drive high-level incident response and forensics while coordinating with engineering and product teams in a fast-paced environment.

The role requires comprehensive knowledge of cybersecurity principles, experience with NIST/ISO 27001, and a current active Secret U.S. Security Clearance. Hybrid work and travel may be involved as projects demand.