Sr Systems Administrator

About the role

This role is a Senior-level Systems Administrator position responsible for the administration, security, compliance, and operational support of enterprise IT infrastructure within highly regulated and mission-critical environments. The ideal candidate possesses deep expertise in Linux and Windows systems administration, endpoint management, server operations, desktop support, and virtualization technologies such as VMware. Beyond hands-on technical responsibilities, this position serves as a Senior technical leader, providing guidance, mentorship, and knowledge transfer to junior administrators and support personnel while helping establish operational best practices, technical standards, and system administration procedures. The successful candidate will act as a trusted technical resource across cross-functional teams, supporting complex troubleshooting efforts, driving continuous improvement initiatives, and ensuring the stability, performance, and security of enterprise systems. The role requires extensive experience managing Microsoft Endpoint Configuration Manager (MECM), administering enterprise server environments, supporting virtualized infrastructure, and maintaining secure computing environments aligned with compliance frameworks such as RMF and DFARS. Candidates should demonstrate a strong security-focused mindset, supported by industry certifications such as Security+, CISSP, or equivalent credentials, and experience operating within cleared government or defense environments. This position is well suited for a seasoned Systems Administrator who can balance strategic technical leadership with hands-on administration, support critical infrastructure operations, mentor developing team members, and serve as a subject matter expert for systems, security, compliance, and enterprise endpoint management.

Responsibilities

• Administration, security, compliance, and operational support of enterprise IT infrastructure within highly regulated and mission-critical environments.
• Providing guidance, mentorship, and knowledge transfer to junior administrators and support personnel.
• Helping establish operational best practices, technical standards, and system administration procedures.
• Acting as a trusted technical resource across cross-functional teams.
• Supporting complex troubleshooting efforts.
• Driving continuous improvement initiatives.
• Ensuring the stability, performance, and security of enterprise systems.
• Managing Microsoft Endpoint Configuration Manager (MECM).
• Administering enterprise server environments.
• Supporting virtualized infrastructure.
• Maintaining secure computing environments aligned with compliance frameworks such as RMF and DFARS.

Requirements

• Senior Systems Administration (Linux & Windows): Expert-level experience administering enterprise server environments, operating systems, infrastructure services, and supporting complex troubleshooting and operational activities.
• Endpoint Management, Server Operations & Virtualization: Extensive hands-on experience with MECM, desktop support, server administration, VMware, and enterprise infrastructure management.
• Cybersecurity, Compliance & Cleared Environment Support: Security certifications (Security+, CISSP, etc.), experience with RMF and DFARS compliance requirements, and the ability to operate effectively within security-sensitive government or defense environments.

Qualifications

• Top Secret Clearance Required.
• Security+ or equivalent IAT Level 2