Physicist - Senior
Location
Reston, VA
Job Type
Full-time
Category
other-general
Posted
June 15, 2026
Reston, VA, USA
Full-time
Clearance Requirement: Top Secret/SCI
**Company Description**
Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide.
**Job Description**
Overview
SOSi is seeking a Senior level Physicist (Scientific Support) to provide technical and scientific analysis to support counter WMD proliferation intelligence support. The role focuses on advancing the clients' Science & Technology objectives related to WMD threats, including traditional and emerging threats. The Physicist will apply advanced scientific principles to develop medical countermeasures and assess capability gaps while coordinating with various stakeholders in the nuclear, chemical and biological defense community.
Essential Job Duties
Full-time
Clearance Requirement: Top Secret/SCI
**Company Description**
Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide.
**Job Description**
Overview
SOSi is seeking a Senior level Physicist (Scientific Support) to provide technical and scientific analysis to support counter WMD proliferation intelligence support. The role focuses on advancing the clients' Science & Technology objectives related to WMD threats, including traditional and emerging threats. The Physicist will apply advanced scientific principles to develop medical countermeasures and assess capability gaps while coordinating with various stakeholders in the nuclear, chemical and biological defense community.
Essential Job Duties