General information

Requisition # R61369 Locations USA-FL-Doral Posting Date 07/02/2025 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 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
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 automation tools (e.g., PowerShell, Bash).
Knowledge of system security best practices and hardening techniques. Experience with troubleshooting hardware and software issues.
Familiarity with IT Service Management (ITSM) principles and practices. Strong analytical and problem-solving skills to diagnose and resolve system-related issues. Ability to identify root causes and implement effective solutions.
Experience in troubleshooting complex technical problems. 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 have an active Secret clearance

Physical Requirements:

Must be able to remain in a stationary position 50%
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.