ACAS Administrator - Journeymen

We are seeking a Journeyman-level ACAS Administrator to support the implementation, configuration, and sustainment of Tenable/Nessus/ACAS across classified and unclassified DoD environments. You'll play a key role in managing scanning tools, interpreting vulnerability results, maintaining dashboards, and mentoring junior staff as part of a Zero Trust cybersecurity initiative.

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

Key Responsibilities

• Support the design, deployment, and optimization of Tenable/Nessus/ACAS across hybrid environments (cloud + on-prem).
• Oversee and train at least one junior ACAS team member; guide on-the-job learning.
• Coordinate with system administrators, cybersecurity engineers, and stakeholders to maintain scanning operations.
• Develop and maintain:
• Scan policies and zones
• Dashboards and visualization tools
• Standard Operating Procedures (SOPs)
• Interpret scan data and provide remediation recommendations.
• Generate technical and functional reports and assist with risk management documentation.
• Ensure system compliance with Federal cybersecurity standards (STIGs, FISMA, FIPS).
• Respond to incidents, support system maintenance, and document all operational procedures.

Required Qualifications

• 3+ years of hands-on experience with Tenable/Nessus/ACAS in a DoD environment.
• Active Secret (Tier 3) clearance.
• Security+ or IAT Level II

Experience with:

• Running and interpreting ACAS scans
• Configuring scan zones and dashboards
• Working in both classified and unclassified systems
• Federal cybersecurity compliance (STIGs, FISMA, FIPS)
• Strong communication and interpersonal skills.
• Ability to mentor junior team members and ensure quality and accuracy in reporting.

Preferred Skills

• Exposure to Zero Trust architecture initiatives.
• Experience supporting hybrid environments (cloud and on-prem).
• Familiarity with risk documentation and real-world security operations.