|Bolliger & Mabillard|
|Headquarters||Monthey, Valais, Switzerland|
Bolliger & Mabillard (commonly known as "B&M") is a roller coaster design consultancy based in Monthey, Switzerland. The company was founded in 1988 by Walter Bolliger and Claude Mabillard, with Bolliger acting as president and Mabillard as vice-president. Since 1990, B&M has built over 100 roller coasters around the world and have pioneered several new ride technologies, most notably the inverted roller coaster. The company started with four employees and has since grown to more than thirty people, mostly engineers and draftsmen. Also, all but one of the company's coasters are still operating.