Engaging the future...

Our government segment provides a wide array of technical services and solutions, primarily to U.S. federal, state and local government agencies. Our commercial segment provides technology-driven consulting, systems integration and outsourcing services and solutions in selected commercial markets.

Featured Services

Systems Engineering and Integration

S4 develops and integrates complete systems of all sizes, bringing to bear our unique combination of deep scientific and technical expertise, broad experience in the environments in which the systems will be used, and strong systems engineering and program management processes and skills.


Contact Us


We always welcome inquiries about Systems & System Software Solutions, LLC. Find out what makes us tick and why we are successful. Give us a call or send us an email. Let us know about your IT needs. We can help.


7240 Parkway Dr, Ste 150

Hanover, MD 21076

Phone Numbers

888.745.5201 x711 (BD), x714 (HR/Recruiting)

866.453.4685 (Fax)


management@s4-llc.com Corporate Officers

bd@s4-llc.com Business Development Office

careers@s4-llc.com Careers