• Arabia, IN USA
Incorporated in Alabama in 1991 and headquartered in Huntsville, AL, S3 provides technical products and services through two diversified business units: SETA Services and Training & Systems Support (TSS).

S3 also has three wholly-owned subsidiaries: Kachemak Bay Flying Services (KBFS), Global Logistics Support Services (GLSS dba S3 Logistics, Maintenance and Training [LMT]), and S3 International, Inc. (S3I).

S3 supports the US Department of Defense (DoD), other US Government (USG) agencies, Partner Nation militaries, and commercial customers.