Sr Systems Admin

About the role

This role is a 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 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

• Administer, secure, and ensure compliance of enterprise IT infrastructure
• Manage Linux and Windows systems, endpoint management, server operations, and desktop support
• Support virtualization technologies (VMware) and maintain virtualized infrastructure
• Provide technical leadership, mentorship, and knowledge transfer to junior staff
• Establish operational best practices, technical standards, and system administration procedures
• Support complex troubleshooting and drive continuous improvement initiatives
• Ensure stability, performance, and security of enterprise systems
• Manage Microsoft Endpoint Configuration Manager (MECM) and enterprise server environments
• Maintain secure computing environments