Senior Systems Administrator

General information

Requisition # R66549 Locations USA-FL-Doral Posting Date 03/10/2026 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 Senior Systems Administrator to join our team in Doral, FL.

Responsibilities include but are not limited to:

• The Senior Systems Administrator leads the maintenance, configuration, and reliable operation of complex computer systems, network servers, and virtualization technologies, including those in critical or high-security environments

• Possess advanced knowledge of operating systems, server hardware, virtualization platforms, network infrastructure, and security best practices

• Install, configure, and upgrade complex systems and software, ensuring optimal performance, security, and availability

• Troubleshoot complex hardware and software errors, using advanced diagnostic tools and techniques to identify and resolve critical issues

• Develop and maintain comprehensive system documentation, including configuration guides, troubleshooting procedures, and Disaster Recovery Plans

• Lead the implementation of automation processes to streamline IT operations and improve efficiency

• Mentor and provide guidance to mid-level Systems Administrators, fostering their professional development and technical expertise

• Contribute to the planning and implementation of IT infrastructure projects, ensuring alignment with organizational needs and industry best practices

• Provides direction and mentorship to subordinate staff

Minimum Qualifications:

• BA/BS in field necessary to assume Senior Systems Administrator duties or a minimum of 9 years years of relevant Systems Administrator III experience.

• High School and 4 years of additional experience or Associate's Degree and 2 years of additional experience may be exchanged in lieu of a required Bachelor's degree

• A candidate holding a relevant Master’s degree may be granted 2 years’ experience credit for that extra education. A candidate holding a relevant PhD degree may be granted 4 years’ experience credit for that extra education.

• Five years of position-specific relevant experience.

• DoD 8570.01-M IAT Level II certification within 6 months of commencing work on the Task Order.

Desired Qualifications:

• 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.

Clearance Requirements:

• Must be eligible for or have a current/active Secret Eligible 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.