Leidos is looking for a Part Time Information Assurance Engineer (ISSE) to join us in our Chantilly, VA office. The candidate will be part of a dynamic team responsible for the creation of a new mission-oriented communication network. Our ideal candidate would be interested in personal growth, expanding beyond typical Info Assurance tasks to learn all facets of the program.

The candidate will be responsible for full life-cycle Information System Security to include system accreditation, which uses GreenLight as a tool that follows the Risk Management Framework (RMF) process. You will work closely with the designated ISSM of your system, as well as your team mates to get the Body of Evidence (BOE) which is called Artifacts in GreenLight. In addition, the candidate will implement security requirements and ensure compliance with ISSM direction and approved SSPs for a network

The candidate is responsible for documents required for accreditation, to include, Continuous Monitoring Plan, Contingency Plan, Configuration Management Plan, Privilege User Guide (PUG) and General User Guide (GUG), etc.

The duties will extend to include a role as Auditor for the networks.  The purpose of an auditor is for collecting and monitoring auditable activities on the network.  Also, ensuring that the Rapid7 scans are done every 120 days and that the Privilege User Reports are current and certified every Quarter. Other duties include establishing or utilizing existing access control mechanisms; defining and configuring the appropriate firewall settings; conducting intrusion detection and prevention, conducting vulnerability scanning; conducting anti-virus management, and conducting the necessary incidence response actions in accordance w/ security policies.

Basic Qualifications:

• Bachelor’s degree and 8 years of relevant experience. Work experience can be used/combined with education.
• Must have an active TS/SCI with Poly to be considered
• Experience developing Body of Evidence (BOE) in support of ICD 503 requirements to include development and maintenance of necessary documents
• Experience operating in a customer-facing environment
• Experience in lifecycle management of computer systems
• System security scanning, monitoring and audit principles (e.g., Rapid7, Splunk)
• Working knowledge of systems engineering principles
• Creating and maintaining project schedules

Desired Qualifications:

• CISSP
• Requirements verification experience
• Technical writing

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

January 15, 2026

Pay Range:

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.