Senior Systems Administrator

General information

Requisition # R63267 Locations USA-FL-Key West Posting Date 09/10/2025 Security Clearance Required TS/SCI 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 Sr. Systems Administrator to join our team in Key West, 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
• They possess advanced knowledge of operating systems, server hardware, virtualization platforms, network infrastructure, and security best practices
• They install, configure, and upgrade complex systems and software, ensuring optimal performance, security, and availability
• They troubleshoot complex hardware and software errors, using advanced diagnostic tools and techniques to identify and resolve critical issues
• They develop and maintain comprehensive system documentation, including configuration guides, troubleshooting procedures, and Disaster Recovery Plans
• They lead the implementation of automation processes to streamline IT operations and improve efficiency
• They mentor and provide guidance to mid-level Systems Administrators, fostering their professional development and technical expertise
• They also contribute to the planning and implementation of IT infrastructure projects, ensuring alignment with organizational needs and industry best practices
• The Senior Systems Administrator provides direction and mentorship to subordinate staff

 

Minimum Qualifications:

• BA/BS in field necessary to assume Senior Systems Administrator or 4 additional years of experience in lieu of a degree.
•   9+ years of experience with 5+ years of relevant Systems Administrator experience.
• Proven track record of managing and maintaining complex IT infrastructure.
• Deep understanding of operating systems (e.g., Windows Server, Linux) and their administration.
• Expertise in server hardware, virtualization technologies (e.g., VMware, Hyper-V), and network infrastructure. Proficiency in scripting and autom