Builder of the Zonda and Huayra, he had a humble and obscure beginning in Argentina in 1955.
He studied Industrial Design and Mechanical Engineering at different universities, then worked on various projects, including furniture design, motor-home and camper design and construction from the mid 70s to the early 80s.
He moved to Italy in 1983, and by '84 he was working with Lamborghini on the various versions of the Countach and Diablo.
Lamborghini wasn't smart enough to get the machinery needed to build some parts themselves, so he split, and went into business making parts that Lamborghini, and other companies, needed at that level of supercar engineering. (Ferrari, Nissan, Renault, Aprilia)
Pagani made 33 cars in 2014.
http://www.autobytel.com/auto-news/features/celebrities/who-is-horacio-pagani-123188/