HQ Systems Administrator

MANTECH • Doral, FL

1d • Onsite

About The Position

MANTECH seeks a motivated, career- and customer-oriented HQ Systems Administrator to join its team in Doral, Florida. The role supports headquarters systems by administering enterprise server hardware, operating systems, and virtualized infrastructure, and ensuring systems remain secure, available, and efficient. The position requires a current, active Top Secret security clearance.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, Systems Engineering, or a related field and 5 or more years of systems administration experience; OR a master’s degree and 3 or more years of relevant experience; OR an associate’s degree and 7 or more years of relevant experience; OR a high school diploma and 9 or more years of relevant experience.
• Proven experience administering Windows and Linux server operating systems, Active Directory, and virtualized enterprise environments.
• Hands-on experience with system patch management, baseline configuration management, and server hardware maintenance.
• Proficiency in troubleshooting hardware, software, network services, and system access issues.
• Experience creating, maintaining, and communicating complex information technology documentation and system baselines.
• Must hold a current, active Top Secret security clearance.

Nice To Haves

• Relevant professional certifications such as CompTIA Security+, Microsoft Certified: Windows Server Hybrid Administrator Associate, or VMware Certified Professional (VCP).
• Prior experience supporting U.S. Military Command operations, Combatant Command environments, or Department of Defense enterprise technical environments.
• Familiarity with DoD STIG implementation, vulnerability scanning tools (ACAS), and secure baseline auditing procedures.
• Demonstrated ability to collaborate effectively across multidisciplinary engineering teams in fast-paced operational environments.

Responsibilities

• Install, configure, maintain, and troubleshoot enterprise server hardware, operating systems, and virtualized infrastructure across headquarters systems.
• Manage user accounts, system permissions, Active Directory structures, and group policies across enterprise networks.
• Perform routine system maintenance, vulnerability patching, software updates, and diagnostic evaluations to ensure security compliance.
• Monitor system performance, storage availability, and network services to proactively resolve operational bottlenecks.
• Collaborate with cross-functional technical teams, network engineers, and leadership to maintain high system availability.
• Maintain accurate configuration management records, technical system documentation, and operational baseline inventories.
• Recommend and implement continuous process improvements to streamline IT administration and enterprise system efficiency.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level