John Thomas Grinder Jr. is an American linguist, writer, management consultant, trainer and speaker. Grinder is credited with co-creating the pseudoscience known as neuro-linguistic programming (NLP) with Richard Bandler. He is co-director of Quantum Leap Inc., a management consulting firm founded by his partner Carmen Bostic St. Clair in 1987. Grinder and Bostic St. Clair also run workshops and seminars on NLP internationally.