Marvin was on trial briefly in 2004/05, he played a first team match against Aldershot Town in the  Conference Cup on Tuesday 8 February 2005.

Marvin began his footballing career as a trainee with Bristol City, unable to establish himself in the first team, he joined Torquay United on loan on 27 September 2002. In January 2003, Marvin joined Cheltenham Town on loan until the end of the season. He returned to Bristol City the following season before released in May 2004.  He joined Forest Green Rovers, Moving to Tamworth on 25 September 2004. Cliftonville on trial in November 2004.
It was from Cliftonville that Marvin joined the Grecians as a trialist. He left City and joined Yeovil Town in March 2005.

Joining Weston-super-Mare at the start of the 2005–06 season he their top scorer that season. He was leading scorer again for Weston when he left on 8 March 2007 to join Conference South rivals Salisbury City. In the 2008 he returned to Weston-super-Mare.

In January 2010 he moved to Truro City. He stayed in Cornwall for two years before moving to Chippenham Town in 2012.

In 2018, he returned to Ashton Gate as an academy coach.

His older brother Aaron is also a professional footballer, Aaron played for the Grecians.