HQ Systems Administrator

General information

Requisition #

R71403

Locations

USA-FL-Doral

Posting Date

10/15/2026

Security Clearance Required

Top Secret

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now-protect and innovate with MANTECH!

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.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.