HQ Systems Administrator

ManTech; Florida; On-site; USD 90,000 - 130,000; Full time

Job summary

MANTECH is seeking a motivated HQ Systems Administrator for our team in Doral, FL. You will install, configure, and support enterprise servers, manage AD, and maintain virtualization across HQ infrastructure.

Responsibilities include patch management, security compliance, performance monitoring, and cross-functional collaboration to ensure high system availability. A TS clearance and strong documentation skills are required.

Qualifications

• Bachelor’s degree in CS/IT/SE or related field with 5+ years of systems administration.
• Proven experience with Windows and Linux server OS, Active Directory, and virtualization.
• Experience with patch management, baseline configuration, and hardware maintenance.
• Strong troubleshooting of hardware, software, network, and access issues.
• Ability to document complex IT information and baselines.

Responsibilities

• Install, configure, maintain, and troubleshoot enterprise servers and virtualization.
• Manage AD structures, user accounts, and group policies across networks.
• Perform routine maintenance, patching, and security compliance checks.
• Monitor performance, storage, and network services to prevent bottlenecks.
• Collaborate with teams to maintain high system availability.
• Maintain configuration management records and operational inventories.
• Recommend process improvements for IT administration.

Skills

Windows Server

Linux Server

Active Directory

Virtualization

Patch Management

Documentation

Education

Bachelor’s degree in Computer Science, Information Technology, Systems Engineering, or related field

Master’s degree

Associate’s degree

High school diploma

Tools

ACAS

Job description

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 International Corporation 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 [e-mail] and provide your name and contact information.