Lear Siegler Services, Inc. (LSI) is a market leader in operations, maintenance, modification, overhaul, systems integration, logistics support and training services to government agencies and commercial customers in the United States and worldwide. Altogether, LSI has more than 40 years experience with an uninterrupted record of distinguished contract performance. LSI began providing maintenance services to large fleets of aircraft in 1961, followed by its training services to the U.S. military and international customers.

In September 1997, LSI was purchased by The Carlyle Group, a Washington-based investment banking group, whose other defense industry interests included EG&G Tehcnical Services, Inc. In 2002, Carlyle decided to consolidate the complementary capabilities of LSI and EG&G under common management. The combined company, under the name EG&G Technical Services, Inc., was subsequently purchased by URS Corporation, an industry leader in architechture and engineering services. LSI remains an operating entity within EG&G and continues its long history of dedicated support to the US Armed Forces.

EG&G Technical Services, Inc. and Lear Siegler Services, Inc. consolidated to become the premier provider of outsourced management and technical support services to the federal government. EG&G is a global technology company based in Gaithersburg, Maryland with annual sales of more than $950M and approximately 10,000 employees. EG&G provides a full range of management, scientific, technical, operational and support services to both government and commercial customers.