HQ Systems Administrator with Security Clearance

MANTECH seeks a motivated, career and customer-oriented HQ Systems Administrator to join our team in Doral, FL. Responsibilities include but are not limited to:

• Installing, configuring, maintaining, and troubleshooting enterprise server hardware, operating systems, and virtualized infrastructure across headquarters systems.
• Managing user accounts, system permissions, Active Directory structures, and group policies across enterprise networks.
• Performing routine system maintenance, vulnerability patching, software updates, and diagnostic evaluations to ensure security compliance.
• Monitoring system performance, storage availability, and network services to proactively resolve operational bottlenecks.
• Collaborating with cross-functional technical teams, network engineers, and leadership to maintain high system availability.
• Maintaining accurate configuration management records, technical system documentation, and operational baseline inventories.
• Recommending and implementing continuous process improvements to streamline IT administration and enterprise system efficiency.

Minimum Qualifications

• Bachelor's degree in Computer Science, Information Technology, Systems Engineering, or a related field with 5+ years of experience in systems administration.
• 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.

Preferred Qualifications

• 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 multi-disciplinary engineering teams in fast-paced operational environments.

Clearance Requirements

• Must hold a current/active top secret security clearance.

Physical Requirements

• Must be able to remain in a stationary position 50%.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.