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Cybersecurity Lead / Information System Security Officer (ISSO)

Connexus HubMillington, TN🇺🇸United StatesPosted 16 Aug 2026

Why This Role Stands Out

As a Cybersecurity Lead / ISSO at Connexus Hub, you'll drive critical security initiatives for a large connected environment, offering significant growth potential and the chance to shape robust cybersecurity practices. This remote role is ideal for experienced cybersecurity professionals with a CISSP and strong RMF expertise who thrive in a dynamic, impactful position. You'll play a vital role in maintaining compliance and ensuring system integrity, making this an excellent opportunity to advance your career.

Quick Overview

Work Type
Remote
Level
Mid Senior

Job Description

  • Location: Hybrid / Remote with travel to CNIC HQ (Millington, TN) and field installations
  • Eligibility: U.S. citizenship; ability to obtain and maintain the appropriate background investigation level
  • Status: Full-time, contingent on contract award

Position summary

The Cybersecurity Lead / ISSO is the senior security accountable for every change touching CNIC F&FR's connected environment. You will treat each network, application, or configuration change as a potential RMF event, evaluate impact against ATO boundaries before implementation, run the coordinated change package process with pre-approved POA&Ms, and ensure no installation is out of compliance for more than 24 hours. You will participate as a voting member of the weekly Joint Change Advisory Board.

What you will own
  • RMF treatment of all changes - impact analysis against ATO boundaries, security control baselines, and continuous monitoring requirements.
  • POA&M development, tracking, and closure across distributed installations.
  • Coordinated change packages for cross-domain releases (e.g., concurrent ERP patch + POS firmware refresh) with staged rollout against the F&FR maintenance calendar.
  • ATO renewal coordination with Authorizing Officials and CNIC cybersecurity stakeholders.
  • Security control testing and audit-trail integrity during patch windows.
  • Cybersecurity workforce: ISSO support, cybersecurity analysts, compliance specialists.
  • Standing voting seat on the Joint Change Advisory Board (JCAB).

Required qualifications
  • Active CISSP certification.
  • CASP+ or equivalent advanced security certification.
  • DoD 8140 / 8570 IAT Level 2 baseline certification (Security+ or equivalent) - required for privileged access per RFP C-12.2.
  • 10+ years RMF practitioner experience in DoD environments.
  • Direct experience as an ISSO on a system with an active ATO.
  • Demonstrated experience evaluating change impact against ATO boundaries on enterprise IT environments.
  • Working knowledge of NIST SP 800-53 controls, eMASS, and DoD continuous monitoring requirements.
  • U.S. citizenship; ability to obtain and maintain the appropriate background investigation level.

Preferred qualifications
  • Active or recent Secret clearance (likely required at the task order level for systems touching DoD-connected networks).
  • Prior ISSO experience on a NAF or Navy connected system.
  • CISM, CISA, or Security+ instructor-level credentials.
  • Experience with cloud security control inheritance (FedRAMP, DISA SRG IL2/IL4).

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