Information System Security Engineer (ISSO)

Annapolis Junction, MD; Washington, DC; or Reston, VA (Onsite - SCIF), VA

ISSO (Cybersecurity Engineer Level 4+)

Annapolis Junction, MD; Washington, DC; or Reston, VA (Onsite - SCIF)

Active TS/SCI with CI Polygraph

Full-Time

Bachelor's degree (or equivalent experience)

• Bachelor's may substitute for 4 years of experience

• Master's may substitute for 6 years of experience

We are seeking a Senior Information Systems Security Officer (ISSO) to lead and support cybersecurity efforts across mission-critical systems. This role is responsible for ensuring security compliance, managing risk, and driving ATO processes within complex, cloud-native environments. The ideal candidate brings deep RMF expertise, strong stakeholder communication, and hands-on experience securing enterprise systems.

Key Responsibilities

• Conduct technical security assessments and support system security posture improvements

• Ensure compliance with RMF and applicable security frameworks (e.g., NIST 800-53, ICD 503)

• Lead ATO and IATT efforts, coordinating with ISSMs, ISSEs, system owners, and Authorizing Officials

• Develop and maintain security documentation including SSPs, POA&Ms, SAPs, and assessment artifacts

• Support security assessment events and respond to stakeholder inquiries (ISSMs, SCAs, etc.)

• Collaborate with developers, engineers, DBAs, and system admins to ensure secure system design and implementation

• Implement and validate security controls within cloud-native and DPaaS environments

• Apply Zero Trust principles across identity, segmentation, and data flow controls

• Utilize tools such as XACTA and Splunk to manage compliance and monitoring efforts