Systems Administrator

General Information

Requisition # R64010 Locations International-Cuba-Guantanamo Bay Posting Date 10/27/2025 Security Clearance Required 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 Systems Administrator to support our current contract out of Guantanamo Bay, Cuba.

Responsibilities include but are not limited to: 

• Leads the maintenance, configuration, and reliable operation of complex IT infrastructure, including servers, networks, and virtualization technologies, particularly in critical or high-security environments.
• Possesses advanced expertise in operating systems, server hardware, virtualization platforms, network infrastructure, and cybersecurity best practices.
• Installs, configures, and upgrades intricate systems and software, optimizing performance, security, and availability; diagnoses and resolves complex hardware and software issues using advanced troubleshooting tools and techniques.
• Develops and maintains comprehensive system documentation, including configuration guides, troubleshooting procedures, and Disaster Recovery Plans.
• Drives the implementation of automation processes to enhance IT operational efficiency, contributes to strategic infrastructure projects, and provides leadership, direction, and mentorship to subordinate Systems Administrators

Minimum Qualifications:

• Bachelor’s degree and minimum of 5 years of Systems Administration experience (additional 2 years of experience in lieu of degree)
• Proven expertise in managing and maintaining complex IT infrastructure, including operating systems (Windows Server, Linux), server hardware, and network components.
• Advanced proficiency in virtualization technologies (e.g., VMware, Hyper-V) and strong skills in scripting and automation (e.g., PowerShell, Bash).
• Knowledge of system security best practices, hardening techniques, and comprehensive troubleshooting methodologies for hardware and software, coupled with familiarity with IT Service Management (ITSM) principles and practices.
• Ability to obtain DoD 8570.01-M IAT Level II certification within six months of starting work on the Task Order.

Preferred Requirements:

• Master’s degree in Computer Science, Information Technology, or a related field.
• Experience with cloud computing platforms (e.g., AWS, Azure, GCP).
• Knowledge of containerization technologies (e.g., Docker, Kubernetes).
• Familiarity with DevOps practices and tools. Experience with monitoring and performance tuning of systems.
• Relevant certifications in systems administration (e.g., Microsoft Certified Solutions Expert (MCSE), Red Hat Certified Systems Administrator (RHCSA), CompTIA Server+).
• Experience at a DoD Combatant Command (e.g., SOUTHCOM, NORTHCOM, CENTCOM, CYBERCOM, INDOPACOM, EUCOM, AFRICOM, STRATCOM, TRANSCOM, SOCOM, SPACECOM) or a component is desired

Security Clearance Required:

• Must have an active DoD Secret clearance with the ability to obtain Top Secret SCI.

Physical Requirements:

• Sedentary Work

• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer
• The person in this position 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 careers@mantech.com and provide your name and contact information.