ACAS Engineer - Senior

We are seeking a Senior ACAS Engineer to lead the design, implementation, and optimization of Tenable/Nessus/ACAS in both unclassified and classified DoD environments. This senior-level role is part of a new team supporting DMDC. You will play a key role in rebuilding scan zones, interpreting vulnerability results, and mentoring junior ACAS team members.

This is a hybrid position based at the Mark Center, with on-site work (2-3 days/week) required for SIPR access.

Key Responsibilities

• Lead the engineering, deployment, and management of Tenable/Nessus/ACAS solutions.
• Collaborate with system administrators, security engineers, and leadership across classified/unclassified environments.
• Rebuild scan zones and contribute to architecture design and server configuration.
• Configure systems for compliance with DoD standards (STIGs, FISMA, FIPS).
• Develop and maintain:
• Scan policies and zones
• Dashboards and metrics
• Standard Operating Procedures (SOPs)
• Interpret scan results and provide remediation recommendations.
• Generate technical/functional reports and contribute to risk management packages.
• Support system maintenance and respond to cybersecurity incidents.
• Train and manage a small team of junior ACAS support engineers.
• Prepare slide decks and email communications related to scan/report data.

Required Qualifications

• 5+ years of experience with Tenable/Nessus/ACAS in DoD environments.
• Active Secret (Tier 3) security clearance.
• Strong communication and interpersonal skills - must be comfortable interfacing with IT Ops and leadership.
• Experience with:
• Designing and administering ACAS/Nessus solutions
• Building and interpreting dashboards
• Scan zone configuration and rebuilding
• STIGs, FISMA, FIPS compliance
• Risk and incident response documentation
• Previous team leadership or mentoring experience.
• Ability to draft technical documentation and communicate effectively via email and presentation slides.

Preferred Skills

• Prior experience in Zero Trust architecture.
• Familiarity with cloud and hybrid environments (on-prem + classified cloud).
• Experience navigating legacy system transitions within DoD or federal programs.