Vloet had a rather short playing career as amateur player, and started working as coach already in 1979, when he took charge of the youth team of amateurs VV Heerenveen while still playing. In 1984 he took his first head coaching job, at amateurs Heusden. In 1999, after six seasons in charge of Hoofdklasse club OJC Rosmalen, he was appointed by FC Den Bosch as youth coach; in 2001 he received head coaching duties at the same club, being however unable to save it from relegation to the Eerste Divisie. He successively moved to Roda JC, where he stayed in charge from 2002 to 2005. He then moved to Sparta Rotterdam and was replaced at the end of the 2006–2007 season by Gert Aandewiel, who came over from HFC Haarlem. Vloet then signed with ADO Den Haag, who he guided back to the Eredivisie in the spring of 2008. He then worked as youth coach of PSV Eindhoven till November 2009, when he was appointed head coach of Eredivisie club N.E.C.. After two seasons in charge of the Nijmegen club, he left in June 2011 to accept a move back at Sparta Rotterdam, this time as technical director for the club.