ACAS Engineer

ManTech; Norfolk (CO); On-site; USD 89,000 - 148,000; Full time

Benefits offered by this job

Health Insurance

Life Insurance

Paid Time Off

Holiday Pay

Disability Insurance

Retirement Plan

Learning & Development

Wellness programs

Job summary

MANTECH is seeking an Assured Compliance Assessment Solution (ACAS) Engineer to work onsite in Norfolk, VA. The role focuses on administering ACAS tools, vulnerability management, and RMF compliance, supporting DoD clients and ensuring secure systems across Windows and Linux environments.

The ideal candidate will have an IAT II certification, ACC/ACAS training, and hands-on experience with Tenable Security Center, Nessus, and VRAM, with strong collaboration across ISSMs, CIOS, and RMF SMEs.

Qualifications

• Associate's degree in Computer Science or Information Technology with 5+ years in Cybersecurity or Network Administration.
• Hands-on with ACAS tools (Tenable Security Center, Nessus).
• IAT Level II certification (e.g., Security+ CE).
• DISA ACAS Operator and Supervisor Course cert.
• Experience with RMF, DoD policies, and STIGs.
• Proficient in TCP/IP, Windows and Linux, and system hardening.

Responsibilities

• Administer and maintain Tenable Security Center and Nessus for continuous monitoring.
• Use VRAM to track and report vulnerabilities with ACAS outputs.
• Analyze scans, validate findings, and coordinate remediation with system owners.
• Create dashboards and reports to support compliance and risk visibility.
• Update ACAS configurations, plugins, and scan policies per DoD guidance.
• Support CMRS vulnerability reporting and troubleshoot scan failures.
• Coordinate with ISSM, ISSOs, CITO, CONMON, A&A, and RMF SMEs.
• Maintain documentation on configurations, schedules, and issue resolution.

Skills

Cybersecurity

Network Administration

Windows

Linux

Education

Associates degree in CS/IT

Tools

ACAS (Tenable)

Nessus

VRAM

DoD STIGs

Job description

General information

Requisition #
R70669
Locations
USA-VA-Norfolk
Posting Date
09/10/2026
Security Clearance Required
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) Engineer to join our team onsite in Norfolk, VA.

Responsibilities include but are not limited to:

• Administer, operate, and maintain Tenable Security Center and Nessus scanners in support of continuous monitoring and vulnerability assessment efforts
• Utilize Vulnerability Remediation Asset Manager (VRAM) to track, manage, and report on vulnerability findings in coordination with ACAS outputs
• Analyze scan results, validate findings, and collaborate with system owners on remediation plans
• Create custom dashboards, queries, and reports to support compliance and risk visibility
• Maintain and update ACAS tool configurations, plugins, and scan policies in accordance with DoD STIGs, DoD ACAS Best Practice Guide, and Navy Scanning Guidance
• Support vulnerability reporting to Continuous Monitoring and Risk Scoring (CMRS) platforms
• Troubleshoot scan failures and system connectivity issues across R&D environments
• Support coordination with internal and external stakeholders, including ISSM, ISSOs, CITO, CONMON manager, A&A manager, and RMF SMEs
• Implement software updates, patches, and configuration changes in compliance with cybersecurity guidance
• Maintain documentation for system configuration, scan schedules, processes, and issue resolution

Minimum Qualifications:

• Associate's degree in Computer Science, Information Technology, or a related field and +5 years of experience in Cybersecurity, Network Administration, or High School Diploma or equivalent and 7+ years of relevant experience in lieu of degree.
• Hands-on experience using ACAS tools (Tenable Security Center, Nessus)
• Must have IAT Level II certification (e.g., Security+ CE)
• Must have DISA ACAS Operator and Supervisor Course certificate
• Experience or knowledge of DoD cybersecurity policies, RMF process, and DISA STIGs
• Proficient level understanding of TCP/IP, Windows and Linux environments, and system hardening principles

Clearance Requirements:

• US Citizenship required and an active Secret clearance with the ability to obtain TS/SCI

Physical Requirements:

• Must be able to remain in a stationary position 50%
• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer
• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

The projected compensation range for this position is $89,100.00-$148,200.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation.

MANTECH’s benefits offerings include, dependent upon position,

• Health Insurance
• Life Insurance
• Paid Time Off
• Holiday Pay
• short-term and long-term Disability
• Retirement and Savings
• Learning and Development opportunities
• wellness programs as well as other optional benefit elections.

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