Senior Application Developer
SOS International LLC • Fort Belvoir, VA • Posted June 19, 2026
Position Overview
Fort Belvoir, VA, USA
Full-time
Clearance Requirement: Top Secret
**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 highly qualified **Senior Application Developer** to join our team on site in **Fort Belvoir, VA** , in support of our government customer. In this role, the Senior Application Developer will serve as a technical expert responsible for the design, development, integration, and maintenance of complex software applications. The position requires a strong proficiency in .NET Core and extensive experience supporting the operation, enhancement, and modernization of the ITCD (Information Technology and Compliance Directorat...
Full-time
Clearance Requirement: Top Secret
**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 highly qualified **Senior Application Developer** to join our team on site in **Fort Belvoir, VA** , in support of our government customer. In this role, the Senior Application Developer will serve as a technical expert responsible for the design, development, integration, and maintenance of complex software applications. The position requires a strong proficiency in .NET Core and extensive experience supporting the operation, enhancement, and modernization of the ITCD (Information Technology and Compliance Directorat...