Endpoint Security System Administrator

ManTech; Miami (FL); On-site; USD 110,000 - 160,000; Full time

Job summary

ManTech in Doral, FL seeks a motivated Endpoint Security System Administrator to join our team. You will install, configure, and maintain ESS/HBSS modules, enforce endpoint policies, deploy agents, run vulnerability scans, and support security baselines across enterprise systems.

The ideal candidate has 5+ years of security or systems administration, relevant certifications, and a current TS clearance. This hands-on role collaborates with cyber leadership to strengthen network defense and

Qualifications

• Bachelor's degree in Computer Science, IT, Cybersecurity or related field with 5+ years of experience in systems/security administration
• Master's degree with 3+ years of relevant experience considered
• Associate's degree with 7+ years of relevant experience
• High school diploma with 9+ years of relevant experience considered
• Experience administering Trellix/McAfee ESS/HBSS policies, modules, and 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 workflows

Responsibilities

• Installing, configuring, maintaining, and administering ESS/HBSS modules and endpoint security capabilities
• Managing endpoint policy enforcement, agent deployments, vulnerability scanning, and baseline compliance
• 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 teams to optimize network defense
• Performing security updates, patches, engine upgrades, and baseline verification across assets
• Recommending and implementing continuous process improvements to ESS management

Skills

Endpoint security

Policy enforcement

Incident response

Documentation

Vulnerability management

Education

Bachelor's degree in CS/IT/Cybersecurity

Master's degree

Associate's degree

High school diploma

Tools

Trellix/ePolicy Orchestrator

ACAS

Job description

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.