LMTSS was preceded by LMATM, which started as a campus of IBM Federal Systems. When the Federal Aviation Administration (FAA) awarded the contract of the Advanced Automation System (AAS) to IBM Federal Systems, the work was performed at a newly constructed campus in Rockville, Maryland. Due to AAS's large size, the entire campus became involved in the program. During the program's development, the campus became specialized in air traffic control programs. This would lead the campus to become a division that worked almost exclusively with the FAA and other civil air authorities like the United Kingdom's National Air Traffic Services (NATS).