ACAS Administrator

ManTech; Florida; On-site; USD 95,000 - 135,000; Full time

Job summary

MANTECH in Doral, Florida seeks an Assured Compliance Assessment Solution Administrator to join our cybersecurity team. You will deploy ACAS/Tenable.sc and Nessus scanners, perform vulnerability scans, and develop compliant risk reports for enterprise environments.

The role requires collaboration with system admins and leadership to remediate vulnerabilities, maintain baselines, and drive scanning policies. Top secret clearance is required for this position.

Qualifications

• Bachelor’s degree with 5+ years in vulnerability management or systems administration.
• DoD experience or familiarity with DoD STIG is a plus.
• Strong reporting, credentialed scanning, and risk assessment skills.
• Experience configuring ACAS SecurityCenter/Tenable.sc and Nessus scanners.

Responsibilities

• Install, configure, maintain, and administer ACAS SecurityCenter/Tenable.sc and Nessus scanners.
• Run automated and manual vulnerability scans and generate compliance dashboards.
• Collaborate with system admins and cybersecurity leadership to remediate vulnerabilities.
• Maintain ACAS baselines, scanner updates, feeds, and configuration controls.
• Create, update, and document custom scan policies and credentials management.
• Troubleshoot, optimize performance, and manage patching for vulnerability scanners.
• Suggest and implement process improvements to streamline vulnerability workflows.

Skills

Vulnerability management

ACAS administration

Nessus

Tenable.sc

Vulnerability scanning

Reporting and documentation

Education

Bachelor’s degree in Cybersecurity, Computer Science, IT, or related field

Master’s degree in related field

Associate’s degree with relevant experience

High school diploma with relevant experience

Tools

Nessus

Tenable.sc

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 is 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 International Corporation 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 [e-mail] and provide your name and contact information.