Systems Administrator

MANTECH • Doral, FL

25d • Onsite

About The Position

MANTECH seeks a motivated, career- and customer-oriented Systems Administrator to join its team onsite in Doral, Florida. The role supports enterprise systems and mission networks by administering server hardware, operating systems, and virtualized infrastructure, while helping maintain system availability and security compliance. The position requires a current/active TS/SCI security clearance.

Requirements

• High school diploma or GED and 7 or more years of progressively responsible systems administration experience; or a bachelor’s degree in Computer Science, Information Technology, or a related field and 3 or more years of relevant experience; or an associate’s degree and 5 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 IT documentation and system baselines.
• Must hold a current/active TS/SCI security clearance.
• Must be able to remain stationary for 50% of the time.
• Must occasionally move around the office to access file cabinets, office machinery, and similar items.
• Must frequently communicate with coworkers, management, and customers, potentially including delivering presentations, and exchange accurate information.

Nice To Haves

• Relevant professional certifications, such as CompTIA Security+, Microsoft Certified: Windows Server Hybrid Administrator Associate, or VMware Certified Professional (VCP).
• Direct experience supporting U.S. Military Command operations, Joint Task Force environments, or OCONUS Department of Defense deployments.
• Familiarity with DoD STIG implementation, vulnerability scanning tools, and secure baseline auditing procedures.
• Ability to collaborate effectively across multidisciplinary teams in dynamic, fast-paced operational settings.

Responsibilities

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

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: High school or GED