 Wit was admitted in March 1978 as a Judicial Trainee at the Studiecentrum Rechtspleging (Training and Study Centre for the Judiciary) in Zutphen, where he remained until 1984.During this period, he held the posts of Law Clerk in the Rotterdam District Court, Rotterdam, (1978-1980) and Deputy Prosecutor at the Amsterdam District Court (1980-1982) and worked as an attorney-at-law with the Law Firm of Van Doorne & Sjollema in Rotterdam.Wit was appointed as Deputy Judge of the Rotterdam District Court in January 1984, Judge of the Netherlands Antilles and Aruba on 1 October 1986 where he functioned as Coordinating Judge, Court of First Instance, Curaçao (1993-1996); Coordinator Judge of Instruction, Netherlands Antilles (1994-1997); Coordinating Judge for the Dutch Windward Islands of Sint Maarten, Sint Eustatius and Saba and from 2001 to 2005 as Senior Justice and Acting Chief Justice.