1785 - Network Security Engineer II

Sigma Defense; San Diego (CA); On-site; USD 95,000 - 136,000; Full time

Benefits offered by this job

Dental and Vision Insurance

Medical Insurance with HSA/FSA/DFSA

Life and AD&D coverage

Employee Assistance Program (EAP)

401(k) Plan with company matching

PTO 160 hours

Floating holidays

Educational Assistance

Competitive Salary

Job summary

Sigma Defense seeks a Network Security Engineer II in San Diego, CA. The role emphasizes implementing DoD cybersecurity policies, vulnerability management, and incident response within CANES environments.

You will harden Windows/Linux systems, manage SIEM/SOAR configurations, and collaborate across teams to maintain compliance and secure operations. A Secret clearance is required or can be obtained.

Qualifications

• 3–10 years of security experience in enterprise/network environments.
• Must be a U.S. citizen.
• Bachelor's degree from an accredited college or university.
• Security+ CE or CISSP certification required, or one OS/platform cert: Linux, Windows, VMware, Cisco.

Responsibilities

• Implement and enforce DoD cybersecurity policies (STIGs, RMF, NIST SP 800-53) across CANES systems.
• Design, develop, implement and troubleshoot vulnerabilities within CANES.
• Lead efforts to harden Windows/Linux systems, apps, devices, and network gear.
• Assist with IAVM compliance, log analysis, and audit readiness tasks.
• Perform patch management, system scanning, and incident response coordination.
• Maintain system documentation and cybersecurity artifacts.
• Support system validation during test events and production installs.
• Submit configuration updates via GitLab/GitHub, Spork/Spork+.

Skills

Experience: 3-10 years

U.S. citizenship

Education

Bachelor's degree

Tools

ACAS

Trellix ESS

Spork/Spork+

NetIQ SIEM Sentinel

Job 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.

• 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.

• 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