Endpoint Security System Administrator

General information

Requisition #

R71359

Locations

USA-FL-Doral

Posting Date

10/13/2026

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 Endpoint Security System Administrator to join our team in Doral, FL.

Responsibilities include but are not limited to:

• Installing, configuring, maintaining, and administering Enterprise Security System (ESS/HBSS) modules and endpoint security capabilities.
• Managing endpoint policy enforcement, agent deployments, vulnerability scanning, and security baseline compliance across enterprise systems.
• Conducting routine system troubleshooting, event monitoring, threat detection, and incident response coordination.
• Maintaining system baselines, agent software repositories, and configuration management controls for security tools.
• Collaborating with cross-functional technical teams, systems administrators, and cybersecurity leadership to optimize network defense.
• Performing security updates, system patches, engine upgrades, and baseline verification across physical and virtual assets.
• Recommending and implementing continuous process improvements to streamline ESS management and operational security.

Minimum Qualifications:

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field with 5+ years of experience in systems or security 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 Trellix/McAfee Enterprise Security System (ESS/HBSS) policies, modules, and ePolicy Orchestrator (ePO).

• Strong background in endpoint protection, host intrusion prevention, rogue system detection, and security compliance auditing.

• Experience maintaining baseline configurations, patch management schedules, and security event logs.

• Experience creating, maintaining, and communicating complex technical documentation and security administration workflows.

Preferred Qualifications:

• Relevant professional certifications such as CompTIA Security+, Trellix/HBSS Advanced Administrator, or CISSP.
• Prior experience supporting U.S. Military Command operations or Department of Defense enterprise technical environments.
• Familiarity with DoD STIG implementation, vulnerability management tools (e.g., ACAS), and automated compliance reporting.
• Demonstrated ability to collaborate effectively across multi-disciplinary engineering teams in dynamic operational settings.

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.