S3 Global Logistics Support Services (GLSS) is a wholly owned Subsidiary of System Studies and Simulation, Inc. (S3) and is doing business as (dba) S3 Logistics, Maintenance, and Training (S3LMT). GLSS provides an impressive catalog of logistic solutions, including field, sustainment and depot level maintenance for air and ground vehicles, weapon systems, and equipment; military and commercial supply operations and accountability; and planning, coordination, execution, and management of asset transportation by air, land, and sea. GLSS provides customer support in all phases of logistic solutions, including procurement, supply, maintenance, and movement of resources.
GLSS is collocated with the parent company, S3, and headquartered in Huntsville, AL. When appropriate, GLSS is the executive agent for major S3 logistics support operations, Service Contract Act (SCA) Business Lines, and for opportunities supported by Collective Bargaining Agreements. GLSS is responsible for the management and operation of the USAF Contract Field Team and USN SEAPORT-e contract vehicles.