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1632 - Senior Systems Administrator

Sigma Defense
Springs, NV Full Time
POSTED ON 4/25/2026
AVAILABLE BEFORE 6/25/2026

Sigma Defense is currently seeking a Senior Systems Administrator to join our team. The Centralized Network Operations Center (C-NOC) Systems Admin will support the Air Force in the operation and maintenance of the MQ-9 communications system, global network architectures to include the Aircraft Control Network (ACN), Sensor Product Dissemination Network (SPDN), Squadron Operations Centers (SOCs) ancillary systems, and relay site communication.

The C-NOC will support all MQ-9 stakeholders including ACC, ANG, AFSOC, SOCOM, USMC, ADC, and other external agencies. The hired Systems Engineer will be responsible for implementing, maintaining, and supporting Windows and Linux based architecture and resolving escalated troubleshooting incidents. They will act as the final point of escalation for the C-NOC, performing root cause analysis, system planning, and ensuring high system availability.

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.

  • 8-10 years of system engineering experience with a focus on Windows Server administration.
  • Security and MTA certifications.
  • Ability to explain complex technical issues, provide step-by-step instructions, and document tickets/fix actions/summaries clearly.
  • Strong knowledge of virtual technologies HyperV, VMware, and Red Hat Linux.
  • Remains calm to de-escalate difficult situations while working effectively with team members to resolve issues. 
  • Ability to lift, carry, and install equipment weighing about 30lbs, heavier equipment as needed.
  • Able to stand up a Windows Enterprise environment with support applications like SolarWinds, ISE, file share, etc.
  • Proven knowledge with basic scripting using PowerShell.
  • Experience creating design documentation and diagrams to support system design.
  • Experience in creating system configurations for purchasing.
  • Ability to run systemwide security, compliance, and vulnerability scans and mitigate findings.
  • Windows Server Active Directory certification, Virtual machine, Linux, and containers experience is preferred.
  • Must be a U.S. citizen.

Personnel Clearance Level:

  • Candidate must possess or have the ability to obtain an active TS/SCI security clearance or higher.
  • Clearance may be sponsored for the right candidate.

Essential Job Duties (not all-inclusive):

  • Work may be required outside the traditional 8-to-5, Monday-to-Friday window to support mission priorities across 24/7 or extended business operations.
  • Provide engineering support for escalated troubleshooting support to the C-NOC.
  • Manage, monitor, and maintain multiple closed Windows domain systems that provide AD, DNS, CA, DC, SQL, and File share services housed on virtual servers.
  • Create and manage a patching system such as WSUS for remote patch management.
  • Assist with account creation and management.
  • Monitor and suggest improvements to system support suite performance, availability, capacity, scalability, and security.
  • Implement and manage system licensing.
  • Provide situation reports, status updates, and assistance with any system upgrades and troubleshooting.
  • Assist in the development of processes and procedures for optimization and sustainment of C2R communications.
  • Run systemwide security, compliance, and vulnerability scans and mitigate findings.

Salary Range: $110,000 - $140,000 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

Salary : $110,000 - $140,000

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