ACAS Administrator

General information

Requisition #

R71393

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 Assured Compliance Assessment Solution (ACAS) Administrator to join our team in Doral, FL.

Responsibilities include but are not limited to:

• Installing, configuring, maintaining, and administering SecurityCenter/Tenable.sc and Nessus scanners across enterprise environments.
• Conducting routine automated and manual vulnerability scans, analyzing scan results, and generating compliance reporting dashboards.
• Collaborating with system administrators, network engineers, and cybersecurity leadership to remediate detected system vulnerabilities.
• Maintaining ACAS application baselines, scanner updates, feed updates, and configuration management controls.
• Creating, updating, and documenting custom scan policies, credentials management, and target zone assignments.
• Conducting diagnostic troubleshooting, system performance optimization, and patch management for vulnerability scanning infrastructure.
• Recommending and implementing process improvements to streamline vulnerability management workflows and security compliance.

Minimum Qualifications:

• Bachelor's degree in Cybersecurity, Computer Science, Information Technology, or a related field with 5+ years of experience in vulnerability management or 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 configuring, deploying, and maintaining Assured Compliance Assessment Solution (ACAS) SecurityCenter/Tenable.sc and Nessus scanners.

• Strong background in vulnerability management, credentialed scanning, patch verification, and risk assessment methodologies.

• Experience maintaining system baselines, configuration management controls, and technical reporting workflows. Experience creating, maintaining, and communicating complex technical documentation and vulnerability mitigation plans.

Preferred Qualifications:

• Relevant professional certifications such as CompTIA Security+, Tenable Certified ISO/Administrator, or CISSP.
• Prior experience supporting U.S. Military Command operations or Department of Defense enterprise technical environments.
• Familiarity with DoD STIG implementation, DISA vulnerability management requirements, and automated compliance tools.
• 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.