1785 - Network Security Engineer II

Sigma Defense • San Diego, CA

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About The Position

Sigma Defense is seeking a Network Security Engineer II to join its team in San Diego, California. The role supports CANES systems by implementing DoD cybersecurity policies and controls, addressing vulnerabilities, hardening platforms, and maintaining cybersecurity compliance and documentation. The engineer also supports validation, assessment, and production installation activities.

The position involves designing, developing, troubleshooting, and automating configurations across RHEL and Windows platforms, SIEM/SOAR tools, ACAS, and Trellix ESS. Candidates must be U.S. citizens, hold a bachelor's degree, have 3–10 years of experience, possess Security+ CE or CISSP and at least one listed platform certification, and possess or be able to obtain an active Secret clearance or higher. The stated annual salary range is $95,000–$136,000.

Requirements

• 3–10 years of experience.
• Must be a U.S. citizen.
• Bachelor's degree from an accredited college or university.
• Security+ CE or CISSP certification.
• At least one operating system or platform certification in Linux, Windows, VMware, or Cisco.
• Must possess or have the ability to obtain an active Secret security clearance or higher.
• Experience designing, developing, and automating configurations for RHEL and Windows platforms.
• ACAS engineering experience, rather than user-only experience.
• Trellix ESS engineering experience, rather than administrator-only experience.

Nice To Haves

• RHEL 7 or later expertise/administration.
• Windows expertise/administration, including Windows Server 2019/2020 through 2025 or later.
• SIEM/SOAR experience with ArcSight, Splunk, or Sentinel; Sentinel and Splunk experience is preferred.

Responsibilities

• Implement and enforce DoD cybersecurity policies, including STIGs, RMF, and NIST SP 800-53, across CANES systems.
• Design, develop, implement, and troubleshoot solutions for vulnerabilities within the CANES system.
• Lead efforts to harden Windows and Linux systems, applications, network devices, and other hardware in the CANES environment.
• Assist with IAVM compliance, log analysis, and audit readiness.
• Perform patch management, system scanning, and incident response coordination.
• Maintain system documentation, cybersecurity artifacts, and baseline reports.
• Support system validation during test events, site assessments, and production installations.
• Design, develop, and automate configurations on the specified platforms and tools.
• Submit configuration updates via GitLab/GitHub and Spork/Spork+.

Benefits

• Dental and vision insurance.
• Medical insurance, including HSA, FSA, and DFSA plans.
• Life and AD&D coverage.
• Employee Assistance Program (EAP).
• 401(k) plan with company matching contributions.
• 160 hours of paid time off (PTO).
• 12 floating holidays.
• Educational assistance.
• Highly competitive salary.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level