Cyber Security Engineer — RMF & ATO Specialist (TS/SCI)

The Mission Essential Group, LLC; Fairfax (VA); On-site; USD 135,000 - 155,000; Full time

Job summary

The Mission Essential Group, LLC in Fairfax, VA is hiring a Cyber Security Engineer to support RMF, A&A, and continuous monitoring for DoD ISR systems. This hands-on role requires implementing security controls, managing RMF artifacts, and coordinating with system owners and ISSMs.

You will work at MEG headquarters in Fairfax, applying NIST and DoD standards, performing vulnerability assessments with Nessus and eMASS/Xacta, and ensuring the confidentiality, integrity, and availability of

Qualifications

• Active TS clearance required.
• Five+ years in Cyber Security.
• Experience with RMF in DoD context (NIST SP 800-37).
• Familiarity with RMF artifacts and A&A processes.
• Hands-on Windows server admin experience.
• Experience with eMASS/Xacta for RMF packages.

Responsibilities

• Support RMF package development, security control implementation, assessment, and continuous monitoring using eMASS and/or Xacta.
• Coordinate with system owners, ISSMs, ISSOs, engineers, assessors.
• Lead vulnerability management activities and ensure corrective actions are tracked.
• Perform risk assessments and support DoD/NIST compliance efforts.
• Install, configure, and maintain systems within secure environments.
• Apply patches and maintain system compliance.

Skills

Active TS clearance

Five years Cyber Security experience

RMF implementation experience

NIST RMF knowledge

Windows Server administration

RMF package management (eMASS/Xacta)

Security+ certification

Education

Bachelor's degree in computer science, Information Systems, Cybersecurity, Information Technology

Tools

eMASS

Xacta

Nessus

SCAP Compliance Checker

SIPRNet environments

Active Directory / Windows Server

Job description

The Mission Essential Group, LLC in Fairfax, VA is hiring a Cyber Security Engineer to support RMF, A&A, and continuous monitoring for DoD ISR systems. This hands-on role requires implementing security controls, managing RMF artifacts, and coordinating with system owners and ISSMs.

You will work at MEG headquarters in Fairfax, applying NIST and DoD standards, performing vulnerability assessments with Nessus and eMASS/Xacta, and ensuring the confidentiality, integrity, and availability of