ACAS Administrator

MANTECH; Miami (FL); Hybrid; USD 90,000 - 130,000; Full time

Job summary

MANTECH in Doral, FL seeks an ACAS Administrator to lead the installation, configuration, and ongoing management of ACAS SecurityCenter/Tenable.sc and Nessus scanners across enterprise environments. You will work with cybersecurity leadership to drive remediation and reporting and ensure baseline and policy compliance.

The ideal candidate has strong vulnerability management experience, credentialed scanning skills, and a track record of maintaining secure, auditable configurations in complex IT

Qualifications

• Bachelor’s degree in Cybersecurity, Computer Science, Information Technology with 5+ years in vulnerability management or systems administration.
• OR a master’s degree and 3+ years of relevant experience; OR an associate’s degree and 7+ years; OR a high school diploma and 9+ years.

Responsibilities

• Install, configure, maintain, and administer SecurityCenter/Tenable.sc and Nessus scanners across enterprise environments.
• Conduct routine automated and manual vulnerability scans, analyze results, and generate compliance dashboards.
• Collaborate with system administrators, network engineers, and cybersecurity leadership to remediate vulnerabilities.
• Maintain ACAS baselines, scanner updates, feed updates, and configuration controls.
• Create, update, and document custom scan policies, credentials management, and target zone assignments.
• Troubleshoot, optimize system performance, and manage patching for vulnerability scanning infrastructure.
• Recommend and implement improvements to streamline vulnerability management workflows and security compliance.

Skills

Vulnerability management

Systems administration

Credentialed scanning

Risk assessment

Education

Bachelor’s degree in Cybersecurity, Computer Science, Information Technology

Master’s degree (3+ years relevant experience)

Associate’s degree (7+ years relevant experience)

High school diploma (9+ years relevant experience)

Tools

ACAS SecurityCenter/Tenable.sc

Nessus scanners

Job description

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.