Fort Meade ISSO — RMF/ATO Lead for IL5/IL6

ECS; Fort Meade (MD); On-site; USD 150,000 - 170,000; Full time

Job summary

Everforth ECS is seeking an Information System Security Officer (ISSO) to work onsite at Fort Meade, MD, supporting IL-5 and IL-6 programs in an operational DoW environment. The role requires strong cybersecurity judgment, RMF familiarity, and hands-on experience with ACAS, Nessus, Trellix, and eMASS.

The ISSO will lead RMF activities, maintain ATO artifacts, coordinate with stakeholders, and ensure continuous monitoring across multiple enclaves in Azure DoW.

Qualifications

• Must be a U.S. citizen
• Active Secret clearance required
• DoD 8140 IAT Level II Security+ (or higher) required
• Ability to work onsite five days a week at Fort Meade, MD
• Experience supporting RMF, ATO maintenance, continuous monitoring, and security documentation
• Hands-on experience with eMASS or similar RMF/GRC software
• Knowledge of cloud security with Azure/AWS responsibilities
• Familiarity with ACAS/Nessus and Trellix endpoint security tools
• Ability to translate vulnerabilities into actionable risk statements

Responsibilities

• Support ISSO activities for a DoD Azure environment, including RMF, ATO maintenance, continuous monitoring, and compliance documentation.
• Develop and maintain ATO artifacts, control evidence, vulnerability reports, diagrams, inventories, and risk documentation.
• Perform security control assessments, audit readiness, continuous monitoring reviews, and authorization package updates for classified systems.
• Manage POA&Ms for vulnerabilities, STIG findings, and other security risks; track remediation.
• Maintain eMASS records, artifacts, POA&Ms, assessment results, and continuous monitoring evidence.
• Review and validate STIG artifacts and remediation documentation.
• Collaborate with engineers, cloud teams, and government stakeholders to validate findings and keep documentation current.
• Administer ACAS/Nessus scanning, scheduling, and vulnerability reporting; troubleshoot credentialed scans.
• Administer Trellix/ESS including ePO policies and endpoint protection settings.
• Monitor alerts in Microsoft Sentinel; participate in cybersecurity status meetings and ATO coordination.
• Other duties as assigned.

Skills

U.S. Citizen

Active Secret clearance

DoD 8140 IAT Level II Security+

Onsite five days a week

RMF/NIST 800-53 knowledge

ACAS/Nessus experience

Trellix experience

eMASS familiarity

Tools

ACAS/Nessus

Trellix / ESS

eMASS

Sentinel

Job description

Everforth ECS is seeking an Information System Security Officer (ISSO) to work onsite at Fort Meade, MD, supporting IL-5 and IL-6 programs in an operational DoW environment. The role requires strong cybersecurity judgment, RMF familiarity, and hands-on experience with ACAS, Nessus, Trellix, and eMASS.

The ISSO will lead RMF activities, maintain ATO artifacts, coordinate with stakeholders, and ensure continuous monitoring across multiple enclaves in Azure DoW.