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Information System Security Officer - TS​/SCI; req

Job in Tysons, Fairfax County, Virginia, USA
Listing for: CATHEXIS
Full Time position
Listed on 2026-09-12
Job specializations:
  • IT/Tech
    Cybersecurity, IT Consultant, IT Project Manager, Information Security & Data Protection
Salary/Wage Range or Industry Benchmark: 125000 - 190000 USD Yearly USD 125000.00 190000.00 YEAR
Job Description & How to Apply Below

Team CATHEXIS elevates the government contracting experience through rapid response, deep skill, and thoughtful problem-solving and communication. Our core capabilities are our top-tier program and project management, data analytics, and audit services, the backbone of which is our integrated approach to operational excellence.

You worked hard to get to where you are. You strive to make every day better than the day before. So do we. Team CATHEXIS operates with an all-in mindset. We are working together to create a company that supports our shared values and individual goals. Our values are centered around leading with integrity, owning the outcome, growing together, and moving with purpose in everything we do for our employees, customers, partners, and communities.

We believe success is best when we listen and lead with empathy; model high standards of ethics to provide a rewarding candidate experience; work hard, have fun, and appreciate the strengths we all bring to the team; and empower our employees to create innovative and trusted results.

We are looking for a dynamic Information System Security Officer (ISSO) with an active TS/SCI clearance to join our team! The Information System Security Officer (ISSO) will lead and coordinate cybersecurity accreditation efforts, partnering with Project Teams, the Services, Operations & Delivery Teams, and customers to manage requirements, timelines, documentation, and compliance. The ideal candidate will have experience with system architecture and design, communicating and collaborating across technical teams, project and operations teams, and senior stakeholders, with strong organizational and program management skills.

This individual will be responsible for tracking the end-to-end lifecycle of cybersecurity accreditation processes, ensuring requirements, milestones, deliverables, and implementation activities remain aligned with project objectives and timelines.

Responsibilities

The responsibilities include, but are not limited to:

  • Work closely with Project Teams, the Services, Operations, and Delivery Teams and customers to coordinate technical and security tasks required for accreditation are completed
  • Serve as the Subject Matter Expert to provide guidance on cybersecurity accreditation processes, Dev Sec Ops , and Federal compliance requirements
  • Communicate regularly with teams and customers to clarify requirements, provide updates, and address questions
  • Understand the detailed steps and engagement points of the DoD Risk Management Framework and FedRAMP accreditation processes
  • Understand the software Dev Sec Ops  process and articulate what infrastructure, software and approval processes are required to successfully implement a software solution in multiple environments
  • Organize, track, and report on the execution of each project cybersecurity accreditation process timeline
  • Identify potential issues or blockers early and work with the team to resolve them before they impact the project

Team CATHEXIS elevates the government contracting experience through rapid response, deep skill, and thoughtful problem-solving and communication. Our core capabilities are our top-tier program and project management, data analytics, and audit services, the backbone of which is our integrated approach to operational excellence.

You worked hard to get to where you are. You strive to make every day better than the day before. So do we. Team CATHEXIS operates with an all-in mindset. We are working together to create a company that supports our shared values and individual goals. Our values are centered around leading with integrity, owning the outcome, growing together, and moving with purpose in everything we do for our employees, customers, partners, and communities.

We believe success is best when we listen and lead with empathy; model high standards of ethics to provide a rewarding candidate experience; work hard, have fun, and appreciate the strengths we all bring to the team; and empower our employees to create innovative and trusted results.

We are looking for a dynamic Information System Security Officer (ISSO) with an active TS/SCI clearance to join our team! The Information System Security Officer (ISSO) will lead and coordinate cybersecurity accreditation efforts, partnering with Project Teams, the Services, Operations & Delivery Teams, and customers to manage requirements, timelines, documentation, and compliance. The ideal candidate will have experience with system architecture and design,…

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