Yaron Minsky heads the Technology group at Jane Street, a proprietary trading firm that is the largest industrial user of OCaml. He was responsible for introducing OCaml to the company and for managing the company's transition to using OCaml for all of its core infrastructure. Today, billions of dollars worth of securities transactions ow each day through those systems. Yaron obtained his PhD in Computer Science from Cornell University, where he studied distributed systems. Yaron has lectured, blogged and written about OCaml for years, with articles published in Communications of the ACM and the Journal of Functional Programming. He chairs the steering committee of the Commercial Users of… Functional Programming, and is a member of the steering committee for the International Conference on Functional Programming.