Senior DoD System Admin - Top Secret, RMF & Cyber Defense

ASEC,; Ridgecrest (CA); On-site; USD 135,000 - 155,000; Full time

Job summary

ASEC is seeking a Senior System Administrator to join our on-site team at NAWS China Lake, CA, supporting mission-critical Navy training systems. The role requires active DoD Top Secret clearance, expertise in RMF/ATO, AD, and VMware environments, and a proactive, collaborative approach to securing and optimizing complex DoD networks.

You will implement DISA STIG-based security controls, conduct vulnerability assessments, and ensure compliance with NIST 800-53 and other DoD guidance while

Qualifications

• Support mission-critical Navy training systems at NAWS China Lake, CA.
• Secure, sustain, and optimize DoD environments for warfighter readiness.
• RMF/ATO activities, vulnerability scanning, and accreditation artifacts.
• Apply and maintain security configurations per DISA STIG requirements.
• Identify and resolve system flaws with technical controls for cybersecurity.

Responsibilities

• Plan, test, and implement system upgrades for performance and reliability.
• Support RMF and ATO activities, including vulnerability scanning and artifacts.
• Integrate new software applications within complex environments.
• Maintain OS security configurations in line with STIG requirements.
• Identify and resolve system flaws; strengthen cybersecurity controls.
• Conduct vulnerability scans and assessments to safeguard systems.
• Troubleshoot software issues in integrated environments.
• Ensure compliance with DoD RMF, FISMA, NIST 800-53, and DoD SRG.

Skills

Windows operating systems

AD domain controller administration

DNS performance and reliability

Log aggregation and analysis

Cybersecurity mindset

Analytical thinking

Team collaboration

Education

Bachelor's degree in Information Technology, Cybersecurity, Computer Science, or related field

CompTIA Security+ certification

Microsoft Certified Solutions Associate - Windows Server 2016 or later

Red Hat Certified System Administrator

VMware Certified Professional

Tools

vCenter/VMware

Windows PowerShell

Job description

ASEC is seeking a Senior System Administrator to join our on-site team at NAWS China Lake, CA, supporting mission-critical Navy training systems. The role requires active DoD Top Secret clearance, expertise in RMF/ATO, AD, and VMware environments, and a proactive, collaborative approach to securing and optimizing complex DoD networks.

You will implement DISA STIG-based security controls, conduct vulnerability assessments, and ensure compliance with NIST 800-53 and other DoD guidance while