[3] Marsh begun his professional career in September 2004 with a win over Freddy James at the York Hall in Bethnal Green.
In June 2008 Marsh met the current British super bantamweight champion Esham Pickering and won a unanimous points decision over 12 rounds.
[12] Following a break from boxing Marsh returned to action on 18 September 2009 to fight Josh Wale for the vacant English super bantamweight crown.
[13][14] On 18 December 2009 Marsh beat Marc Callaghan over six rounds at the York Hall and on 5 February 2010 challenged Jason Booth for the British and Commonwealth titles.
The fight, at the Harvey Hadden Leisure Centre in Nottingham, resulted in a second career defeat for Marsh as he failed to reclaim his old title.