Nuclear Physicist

Intreped Partners and its wholly owned subsidiary, Global Systems Engineering LLC (GSE) , are a HUBZone small business supporting federal, state, and military partners across the defense, energy, and environmental sectors.

We partner with our clients to tackle complex, high-impact challenges that directly support national security and mission success.

At GSE, integrity, trust, and collaboration aren’t just values—they’re how we work.

Our team is made up of professionals who are passionate about solving real-world problems and committed to making a meaningful difference.

GSE is currently seeking a Nuclear Physicist to support the Defense Threat Reduction Agency (DTRA) Technical Reachback team in Fort Belvoir, Virginia.

This position provides scientific and technical analysis and advice related to nuclear and radiological threats in support of DTRA Reachback customers.

Customers include military teams, emergency responders, and interagency partners within the Department of Defense (DoD), Combatant Commands, Department of Homeland Security, Federal Emergency Management Agency, and other federal organizations.

To be qualified, the candidate MUST be a U.S. citizen and be eligible to obtain a Top Secret (TS) security clearance with Sensitive Compartmented Information (SCI) access.

An active security clearance at the time of application is not required.

This position requires a strong technical foundation in nuclear physics and/or related nuclear sciences, including the ability to evaluate nuclear and radiological hazards, assess technical information, and communicate complex scientific concepts to operational and non-technical audiences.

Following receipt of the required security clearance, this position is primarily on site at Fort Belvoir, VA and requires shift work; shifts can vary and expand over multiple days at a time.

Tasks assigned to this position include:

• Conduct technical analyses and risk assessments related to nuclear and radiological threats, hazards, and incidents
• Respond to Requests for Information (RFI) from DoD military and civilian personnel
• Provide professional scientific opinions and technical advice related to nuclear and radiological threats and risk mitigation
• Analyze technical data and scientific literature to support time-sensitive operational requirements