Senior Cybersecurity Systems Engineer – TS/SCI

Sunfire Solutions; Fairfax (VA); On-site; USD 140,000 - 190,000; Full time

Job summary

Sunfire Solutions seeks a Cleared Cyber-Security / Systems Engineer (Expert) in Fairfax, VA to design, implement, and secure complex enterprise systems with TS/SCI clearance and active poly. You will mentor junior engineers and collaborate with stakeholders to ensure security is woven into the lifecycle.

The role emphasizes secure architectures, SSDLC, security controls, and hands-on development with modern security tools; you will lead evaluations, automation for DevSecOps, and risk management.

Qualifications

• Active TS/SCI with polygraph.
• Excellent communication, organizational, and leadership skills.
• Willingness to learn new cybersecurity technologies and threats.
• BS/BA in Computer Science, Cybersecurity, or related field.

Responsibilities

• Leading the design and implementation of secure enterprise systems and architectures.
• Defining, implementing, and enforcing security controls and best practices across various systems.
• Conducting security assessments, vulnerability analysis, and risk management activities.
• Collaborating with development teams to integrate security into the system development lifecycle (SSDLC).
• Evaluating and recommending new security technologies and tools.
• Troubleshooting and resolving complex security‑related technical issues.
• Mentoring junior engineers and sharing advanced cybersecurity knowledge.
• Streamlining security processes and integrating automation for DevSecOps initiatives.

Skills

10+ years exp

Cybersecurity focus

Systems engineering

Security frameworks

Scripting automation

Cloud security (AWS)

SSDLC

Team leadership

Education

BS/BA in Computer Science

Tools

SIEM

IDS/IPS

Vulnerability scanners

EDR

PowerShell

Job description

Sunfire Solutions seeks a Cleared Cyber-Security / Systems Engineer (Expert) in Fairfax, VA to design, implement, and secure complex enterprise systems with TS/SCI clearance and active poly. You will mentor junior engineers and collaborate with stakeholders to ensure security is woven into the lifecycle.

The role emphasizes secure architectures, SSDLC, security controls, and hands-on development with modern security tools; you will lead evaluations, automation for DevSecOps, and risk management.