Systems Administrator with Security Clearance

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to join our team in Doral, FL. This role follows a Panama Schedule. A Panama Schedule is three, 12-hour shifts and then three days off, repeating. This position rotates between night shifts and day shifts every 90 days. Individuals must be willing to work days, nights, weekends and holidays. Responsibilities include but are not limited to:

• Installing, configuring, maintaining, and troubleshooting enterprise server hardware, operating systems, and virtualized infrastructure.
• Managing user accounts, system permissions, active directory structures, and group policies across mission networks.
• Performing routine system maintenance, vulnerability patching, software upgrades, and diagnostic evaluations to ensure baseline security compliance.
• Monitoring system performance, storage availability, and network services to proactively identify and resolve operational bottlenecks.
• Collaborating with cross-functional technical teams, network engineers, and site 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

• High School Diploma or GED with 7+ years of progressively responsible experience in systems administration.
• OR a bachelor's degree in Computer Science, Information Technology, or a related field with 3+ years of relevant experience
• OR an associate's degree with 5+ 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).
• 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.
• Demonstrated ability to collaborate effectively across multi-disciplinary teams in dynamic, fast-paced operational settings.

Clearance Requirements

• Must hold a current/active TS/SCI 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.