GCCS Systems Administrator

General information

Requisition #

R71394

Locations

USA-FL-Doral

Posting Date

10/15/2026

Security Clearance Required

Top 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 Global Command and Control (GCCS) Systems Administrator to join our team in Doral, FL.

Responsibilities include but are not limited to:

• Installing, configuring, maintaining, and administering Global Command and Control System (GCCS-J/GCCS-A/GCCS-M) servers and client workstations.
• Managing GCCS system baselines, database synchronization, track management, and C4I system interfaces across operational networks.
• Performing routine system administration, vulnerability patching, software updates, and diagnostic troubleshooting on Solaris, Linux, and Windows platforms.
• Maintaining system configuration baselines, operational logs, and data feed synchronization across theater command networks.
• Collaborating with cross-functional technical teams, network engineers, and operational staff to ensure high GCCS availability.
• Executing system backups, disaster recovery procedures, and security compliance verification for mission-critical command systems.
• Recommending and implementing continuous process improvements to enhance GCCS operational performance and data reliability.

Minimum Qualifications:

• Bachelor's degree in Computer Science, Information Technology, Systems Engineering, or a related field with 5+ years of experience in systems administration.

• OR a master's degree and 3+ or more years of relevant experience

• OR an associate's degree and 7+ or more years of relevant experience

• OR a high school diploma and 9+ or more years of relevant experience

• Proven experience administering and maintaining Global Command and Control System (GCCS) variants (GCCS-J, GCCS-A, or GCCS-M) in an enterprise environment.

• Strong background in Unix/Solaris, Linux (RHEL), and Windows server administration, including database management and command track synchronization.

• Experience maintaining system baselines, configuration management controls, and patch management protocols.

• Experience creating, maintaining, and communicating complex technical documentation and system baseline architecture diagrams.

Preferred Qualifications:

• Relevant professional certifications such as CompTIA Security+, Red Hat Certified System Administrator (RHCSA), or Oracle Certified Associate (Solaris).
• Prior experience supporting U.S. Military Command operations, Combatant Command environments, or Department of Defense C4I infrastructure.
• Familiarity with DoD STIG implementation, DISA compliance standards, and automated vulnerability scanning tools (ACAS).
• Demonstrated ability to collaborate effectively across multi-disciplinary engineering teams in fast-paced operational environments.

Clearance Requirements:

• Must hold a current/active top secret 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.

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.