Stewart & Stevenson

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Stewart & Stevenson
Industry Manufacturing, Distribution, Rental and Parts & Service
Founded 1902, Houston, Texas
Founders C. Jim Stewart and Joseph R. Stevenson
Headquarters Houston, Texas
Key people
Hushang Ansary
John B. Simmons
(Chief executive officer)
Number of employees
2,500 (2011)
Slogan A Century of Innovation
Stewart & Stevenson headquarters in Downtown, Houston

Stewart & Stevenson, a privately held company based in Houston, Texas, designs, manufactures and provides specialized equipment and aftermarket parts and service for the oil and gas and other industries.


The company manufactures oilfield equipment that includes truck, trailer, and skid mounted fracturing blenders and pumpers and units for chemical additive, cementing, coiled tubing, nitrogen pumping, controls and power generation equipment; land-based drilling, workover and well servicing rigs; and Rail King railcar movers. Stewart & Stevenson is a distributor of diesel and natural gas engines, transmissions and materials handling equipment. Stewart & Stevenson partners with original equipment manufacturers such as; MTU, Detroit Diesel, Electro-Motive Diesel, Deutz, Allison Transmission and Hyster. The company also provides aftermarket parts and service and offer rental equipment to a broad range of customers. Headquartered in Houston, Texas since 1902, Stewart & Stevenson provides equipment and service to the global market from a network of sales and service centers in domestic and international locations.

Markets Served[edit]

  • Oil & Gas
  • Power Generation
  • Material Handling
  • On-Highway / Transportation
  • Rail
  • Marine
  • Mining
  • Construction / Industrial
  • Agriculture
  • Military / Government

Historical Timeline[edit]

1902 Stewart & Stevenson originated in Houston, TX, as a blacksmith shop shoeing horses and a carriage shop manufacturing carriages and wagons.

1905 C. Jim Stewart & Stevenson repaired their first “horseless carriage.”

1920 As the automobile became more prevalent, the company shifted its focus to automobile repair and customization.

1923 The company became a GMC truck distributor and builder of truck body variants.

1938 950 Manufactured a “swamp buggy” for support of oil exploration in Gulf Coast marsh areas.

1958 Entered the aircraft ground support business with GM Detroit Diesels. During the decade, designed and built approximately 1000 low silhouette, self-propelled GPUs with a 400 Hz, 90 kVA generator set for major airlines.

1959 Signed distributorship for Hyster industrial forklifts.

1960s Designed, built and marketed oilfield self-propelled service units under the trade name “Fieldmaster.”

1962 Expanded the ground support equipment product line with tow tractor for various airlines.

1963 Built oilfield frac trucks.

1963 – 1966 Entered gas turbine – powered industry & pleasure craft engines.

1969 Designed and built Land Leveler vehicle used for leveling an area that was to be water flooded for rice fields.

1970 Formed the Thermo King division.

1975 JV GM Detroit Diesel Sales in Venezuela.

1980 Started building GE gas turbine power packages for offshore oil rigs.

1985 California Cogen – power producing industry. Competed for the U.S. Army’s M939 A2 5-ton program.

1987 Through a joint venture with Mercedes Benz, built 700 “Starship” transit buses from 1987-1992.

1988 Granted exclusive territory for EMD engines, included 10 southern states, Mexico & Central America.

1989 Awarded a John Deere light industrial dealership.

1990 Designed and built Rail King railcar mover.

1991 Awarded contract to build $1.2 billion of 2.5 & 5-ton trucks for U.S. Army.

1992 Purchased Foley Valves – oil field equipment supplier.

1994 Acquired PAMCO – Waukesha gas compression & generating equipment.

1995 Signed agreement with European Gas Turbines Ltd., packager of mid-range units. Marketed large self-propelled snowblowers for use at airports and on roadways.

1996 Competed for the U.S. Marine/Army Medium Tactical Truck Replacement (MTTR) Program, August 1996.

1999 Began production in September of second multi-year contract for the next FMTV increment of 10,000 vehicles.

2000 Sold gas-turbine division to GE Power Systems. Acquired TUG aircraft ground support vehicles business.

2001 Sold John Deere dealership. Formed the Specialty Wheeled Vehicle Division.

2002 Stewart & Stevenson celebrated 100 years in manufacturing. Company focused on four business groupings: • Power Products: distributor, value-added packager, and service provider of MTU, Detroit Diesel, Waukesha, Hyster, Allison, Electro-Motive, and Deutz products for numerous markets. • Tactical Vehicle Systems: manufacture of FMTV military trucks and trailers. • Engineered Products: consisting of Petroleum Equipment (Coiled Tubing, Fracturing and Acidizing equipment, and Remanufacturing); Distributed Energy Solutions (Backup Power Plants, Distributed Generation, Peak Shaving Plants, Wastewater Plants and Landfill Plants), and Utility Equipment (manufacture of Rail King, Snow Removal, Input/Output equipment). • S&S TUG: manufacture of airline ground support equipment.

October 18, 2002 Stewart & Stevenson stock moved to New York Stock Exchange; shares sold under new ticker symbol “SVC.”

2002 Built all electric TUG product line.

2003 HEV transit bus package added (hybrid “clean engine”)

April 2003 Stewart & Stevenson awarded U. S. Army’s FMTV A1CR Contract for 10,000 trucks and trailers through 2008.

2004 • Exited Thermo King product offering and internal transportation business • Disposed of wheelchair lift manufacturing and MerCruiser product offering • Transferred Hybrid Bus Refurbishment operation from Power Products to Engineered Products • Exited Distributed Energy Solutions business • Sold TUG airline segment • TVS added Mercedes-Benz G-Wagen and Automotive Technik’s Pinzgauer Light Tactical Vehicle to its product line; offers 15 vehicle variants. Obtained contracts for FMTV Low Signature Armored Cab (LSAC). • Power Products executed new contracts with Detroit Diesel and DaimlerChrysler for distribution and servicing of diesel engine products • Key business partners: Allison Transmission, Detroit Diesel/MTU, Deutz Corporation, Electro-Motive Division, Hyster Company, and Waukesha.

2005 Refocused on three segments: Tactical Vehicle Systems, Power Products and Engineered Products.

2006 Tactical Vehicle Systems merged with Armor Holdings, Inc.

Engineered Products and Power Products divisions sold to Hushang Ansary; becomes Stewart & Stevenson LLC. Company focus: manufacture of equipment for oil and gas market, international expansion.

2007 Stewart & Stevenson LLC acquired Crown Energy Technologies, Inc., expanding the company’s line of stimulation equipment for the oil and gas industry and adding rigs to the product line.

2011 Stewart & Stevenson LLC acquired EMDSI-Hunt Power LLC, to be merged with S&S EMD operations (primarily New Orleans branch) and expand EMD sales and service internationally, as well as use international territories gained to expand oil & gas products and services internationally.

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