[3] In 2012, Sims he won an Offie award for "People's Favourite Male Performance" for his role as alleged Texan killer Lee Fenton in As We Forgive Them at the Arcola Theatre in London.

[4] Sims has appeared extensively on television and stage and has a real ear for voices and accents performing over 100 different characters for radio including radio drama The Archers,[2] whilst his varied TV appearances include Endeavour, Father Brown, Ultimate Force, Uncle, The Basil Brush Show, children's animation Chuggington and BBC One drama Casualty.

He also portrayed the murderer of Joanna Yeates, Dutchman Vincent Tabak, in the BAFTA winning ITV docu-drama The Lost Honour of Christopher Jefferies.

In 2017 he appeared in Fox TV's Houdini & Doyle, Midsomer Murders “Crime and Punishment”, Sci-Fi cult hit Red Dwarf and Series 2 of Stan Lee's Lucky Man.

The following year he was nominated for Best Actor at the 2018 BBC Audio Drama Awards for his role as Charlie Hammond in Oliver Park: The Easter Riot.

2020 Saw Sims play ex Premier League footballer Paul Williamson in Iain Morris and Damon Beasley's BBC Comedy The First Team.