Senior OT Cyber Systems Admin – RMF/ATO & Compliance Onsite

NEMEAN SOLUTIONS LLC; Columbus (OH); On-site; USD 110,000 - 160,000; Full time

Job summary

Cybersecurity Jobs is seeking an on-site Lead Cyber Systems Administrator in Columbus, OH to oversee OT cybersecurity operations for facility and control systems. You will coordinate with OEM vendors and a remote government cybersecurity team, drive RMF compliance, and lead vulnerability management activities.

You will mentor two RMF Specialists, develop team capabilities, and ensure audit readiness during ramp-up and transition activities.

Qualifications

• Hands-on RMF experience from initiation to assessment and authorization support.
• Experience mentoring cybersecurity personnel and coordinating with onsite/offsite teams.
• Ability to produce audit-ready security artifacts and documentation.

Responsibilities

• Lead daily cybersecurity operations for facility and control systems, including patching, hardening, monitoring, and compliance.
• Supervise and mentor two RMF Specialists, including work reviews and capability development.
• Function as on-site liaison between facility team, OEM vendors, and remote government cybersecurity team.
• Run vulnerability scans, analyze findings, and drive remediation to completion.
• Oversee RMF documentation and security artifacts for audit readiness.
• Support system categorization and risk assessment for off-site stakeholders.
• Build and maintain an accurate inventory of systems, software, and documentation.
• Enforce cybersecurity best practices and separation of duties across the team.
• Represent on-site readiness during customer meetings, workshops, and reviews.
• Lead phase-in and transition activities during ramp-up with the broader government cyber organization.

Skills

RMF operations

Mentoring staff

Stakeholder coordination

Technical writing

Vulnerability management

Education

Bachelor’s degree

Tools

Vulnerability scanning tools

Linux administration

Job description

Cybersecurity Jobs is seeking an on-site Lead Cyber Systems Administrator in Columbus, OH to oversee OT cybersecurity operations for facility and control systems. You will coordinate with OEM vendors and a remote government cybersecurity team, drive RMF compliance, and lead vulnerability management activities.

You will mentor two RMF Specialists, develop team capabilities, and ensure audit readiness during ramp-up and transition activities.