Having helped form the company in 2002 as an assistant editor, Leo was soon recognised by Boards International magazine as one of the top five new editors. In 2011 Televisual magazine voted Leo number 6 in the top 10 best commercial editors.

Over the years, Leo has managed to successfully combine commercial and long form.  His commercial collaborations include Harmony Korine, Thirtytwo, Sara Dunlop and Armando Iannucci, with his most notable award being a Clio in 2008 for best editing for Thorntons 'Stuck', directed by Harmony Korine.  

After editing the cult British horror 'Mum and Dad' (Steven Sheil) in 2007, he then went on to edit Korine's fourth feature film 'Trash Humpers', 2009, which contentiously won best film at Copenhagen Documentary Film Festival, despite its fictional nature.  More recently he worked on Korine's latest film starring Val Kilmer, 'The Fourth Dimension', currently touring the film festivals.  

His first of three long form collaborations with Miranda Bowen was the controversial Channel 4 comedy satire series 'Cast Offs' (2009).  The following year he edited the BBC adaptation of D.H Lawrence's 'Women in Love'.   They are currently editing a feature film 'Gozo', which they have developed together.