Dallas studied sculpture at the RCA from 1999-2001 and specialised in foundry art practice. In direct succession, he worked for the RCA for two years and taught sculpture in Chelsea, London, Bristol and Cardiff. In 2007 Dallas was short listed for the Jerwood sculpture prize with his work 'Sweet' and in 2008 was commissioned by Barratt Homes of Bristol to produce a major public art piece 'Ocular Gate'. Dallas has had numerous shows throughout the UK, Europe and USA and his work is held in private and public art collections. In 2009 Dallas helped initiate an artist collective; the group was short-listed to represent Wales at the 54th Venice Biennale in 2011. He now lives and works in Bristol and runs dedicated foundry research projects and sculpture summer schools for professional artists and practitioners.
In 2018 Dallas was selected to become an academician and council member of the Royal West of England Academy of Art, Bristol. Also in this year he was selected as a member of the Royal Society of Sculptors.