Senior Systems Security Engineer (Level III)

Location: Fullerton, CA

Schedule: Onsite, 9/80 work schedule

Contract: 6 months with strong extension potential to go multiple years

Clearance: Active Secret required at start

Citizenship: U.S. Citizen required

Compensation

$7o/hr to $85/hr

Overview

This role supports a high-priority defense program focused on securing embedded systems and protecting mission-critical technology.

You will work within a Systems Security Engineering (SSE) team implementing cybersecurity solutions across hardware, software, and network environments. This role is execution-focused, supporting architecture, compliance, and validation activities across the full system lifecycle.

You are not just documenting controls. You are validating, testing, and helping ensure systems are actually secure in real-world environments.

Program Details

Program: Sentinel

Contract: W31P4Q-24-C-0015

Key Responsibilities

Cybersecurity Implementation

• Support implementation of system security solutions across products
• Assist in integrating cybersecurity into system development lifecycle

RMF and Compliance

• Support development of RMF documentation for ATO accreditation
• Ensure compliance with NIST RMF controls

Security Validation and Testing

• Analyze cybersecurity data and test results
• Validate secure configurations across systems and infrastructure
• Use tools such as Nessus, STIGs, Evaluate STIG, and RADIX

Systems and Network Security

• Validate security across routers, switches, firewalls, servers, and OS
• Support patching efforts and generate security artifacts

Engineering Support

• Assist in requirements, architecture, and system documentation
• Contribute to overall SSE program execution

Required Qualifications

• Bachelor’s degree in STEM field (preferred)
• 5+ years of experience in cybersecurity or system security engineering
• Active Secret clearance required at start
• Experience with DoD cybersecurity or secure system environments
• Experience with system security, embedded systems, or cyber engineering
• Experience supporting requirements, design, or architecture artifacts

Preferred Qualifications

• Experience with NIST RMF and ATO processes
• Experience with vulnerability scanning tools (Nessus, STIGs, etc.)
• Cyber certifications (CISSP, CEH, GSLC, Security+)
• Scripting experience (Python or Bash)
• Experience working in Linux environments
• Strong collaboration skills in technical team environments

Work Environment

• Onsite engineering environment
• Collaborative SSE and program team
• Direct exposure to defense program execution

Benefits

• Health, Dental, Vision Insurance
• Life Insurance
• Short-Term and Long-Term Disability
• 401(k) eligibility after 1 year
• Benefits begin after 30 days of employment

California Sick Leave

• Accrual rate: 1 hour for every 30 hours worked
• Accrual cap: 48 hours (6 days)