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Network Security Engineer

Sigma Defense

On-site
San Diego, CA
Full-time
Mid Level
Senior
3+ yrs
$95k–$136kPosted 2h ago

Real job — pulled straight from Sigma Defense’s careers page · Verified October 30, 2026 · No reposts.

Job description

Sigma Defense is hiring a Network Security Engineer — a full-time, based in San Diego, CA role ($95k–$136k). Apply directly on Sigma Defense's careers page below.

1785 - Network Security Engineer II

Location: San Diego, California, United States

Department: IMS (IMSENG, IMSPRG, IMSNM, IMST&R)

Workplace: on_site

Employment Type: full

Description

Sigma Defense is seeking a Network Security Engineer II to join our team in San Diego, CA.

Equal Opportunity Employer/Veterans/Disabled: Sigma Defense Systems is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

Requirements

  • 3 - 10 years of experience.
  • Must be a U.S. citizen.

Computer Programs/Software:

  • ACAS
  • Trellix ESS
  • Spork/Spork+
  • NetIQ SIEM Sentinel

Mandatory Certifications:

  • Security+ CE or CISSP
  • At minimum one of the following operating system/platform certifications:
    • Linux
    • Windows
    • VMware
    • Cisco

Personnel Clearance Level:

  • Candidate must possess or have the ability to obtain an active Secret security clearance or higher.

Education Requirements:

  • Bachelor's degree from an accredited college or university.

Essential Job Duties (not all-inclusive):

  • Implement and enforce DoD cybersecurity policies (STIGs, RMF, NIST SP 800-53) across CANES systems.
  • Design, Develop, implement and troubleshoot solutions for vulnerabilities within the CANES system.
  • Lead efforts to harden Windows/Linux systems, applications, network devices, and various hardware within the CANES environment.
  • Assist with IAVM compliance, log analysis, and audit readiness tasks.
  • 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 following platforms:
    • RHEL expertise/Admin (RHEL 7+ ideal)
    • Windows expertise/Admin (Win2019/2020 -> 2025+
    • SIEM/SOAR, (ArcSight/Splunk/Sentinel etc. Sentinel & Splunk experience Preferred!)
    • ACAS (engineering, not just user experience)
    • ESS (Trellix) Engineering (not admins)
  • Submit configuration updates via GitLab/GitHub, Spork/Spork+.

Salary Range: $95,000 - $136,000 annually.

Benefits

  • Dental and Vision Insurance
  • Medical Insurance to Include 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

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Frequently asked questions

What is the salary for Network Security Engineer at Sigma Defense?

The estimated salary range for Network Security Engineer at Sigma Defense is $95,000 - $136,000 USD per year.

What skills are required for Network Security Engineer at Sigma Defense?

The required skills for Network Security Engineer at Sigma Defense include: CompTIA Security+, CISSP, Linux, Windows, VMware, SIEM, Splunk, GitLab, GitHub.

What is the seniority level for Network Security Engineer at Sigma Defense?

Network Security Engineer at Sigma Defense is a Mid Level / Senior level position.

How do I apply for Network Security Engineer at Sigma Defense?

You can view the full description and apply for Network Security Engineer at Sigma Defense on EchoJobs: https://echojobs.io/job/sigma-defense-1785-network-security-engineer-ii-d354d.