Tenable.SC (ACAS) System Administrator and Security Analyst - CISCO/Windows/Linux

Overview

Peraton is seeking a Tenable.SC (ACAS) Administrator to support vulnerability management operations at the Regional Cyber Center – Europe (RCC-E).

Location

Location: On-site, Wiesbaden, Germany

Responsibilities

• Administer and maintain Tenable.SC (ACAS), including Nessus scanners, Nessus Agents, and NNM (Network Monitor).
• Schedule and run enterprise vulnerability scans across NIPRNet and SIPRNet networks across Europe.
• Ensure systems comply with DoD cybersecurity standards, including IAVA deadlines and DISA STIGs.
• Troubleshoot scan issues, resolve authentication failures, and track scan coverage.
• Generate and deliver scan reports, compliance summaries, and Power BI dashboards.
• Train end users and system owners on scan processes, credentialing, and remediation support.
• Coordinate with RCC-E, system owners, and mission partners to support vulnerability remediation efforts.
• Maintain SOPs, TTPs, and POA&Ms for scan operations and compliance tracking.

Minimum requirements

Education & Experience:

• Must meet the DoD 8140 education and experience requirements through one of the following pathways:

• Bachelor’s degree in Computer Application Development, Engineering, or a related technical field with a minimum of 5 years of IT Cybersecurity experience, OR Associate’s degree in a related field with 7 years of relevant IT Cybersecurity experience, OR High school diploma with a minimum of 9 years of directly related IT Cybersecurity experience.

One of the following certifications:

• CompTIA Advanced Security Practitioner (CASP+)
• (ISC)² Certified Information Systems Security Professional (CISSP)
• GIAC Certified Incident Handler (GCIH)

One of the following certifications (in alignment with DoD 8140 and platform-specific role expectations):

• Microsoft Certified Solutions Expert (MCSE – 2019 or later)
• Microsoft 365 Certified: Enterprise Administrator Expert
• Microsoft 365 Certified: Security Administrator Associate
• Azure Solutions Architect Expert
• DISA ACAS Administrator, OR
• CA Spectrum Administrator or NETCool Administrator per role-specific DCWF 451 requirements.

Technical Experience:

• Minimum of 2 years of experience using IA scanning tools (e.g., Retina, ACAS, Nessus, Tenable.SC).
• 2 years of experience with Red Hat Linux/UNIX or Microsoft server platforms.
• 2 years of experience supporting U.S. military Command and Control (C2) systems or commercial LAN/WAN infrastructure environments.

Security:

• U.S. Citizenship required.
• Must possess an active DoD Secret clearance

Preferred Qualifications:

• An active Top Secret security clearance.
• Hands-on experience with scripting languages or automation tools (e.g., Power BI, PowerShell, etc.).
• ACAS experience within the Department of the Army DoDIN-A.
• Working knowledge of network security architecture, protocols, and secure system configurations.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent written and verbal communication skills, including the ability to communicate technical concepts clearly to non-technical audiences.