Robyn joined Dyfed Powys Police in 1992, during this time he has served in several different roles across the four counties of Dyfed Powys; these have included periods within Public Protection and uniform policing.
He was promoted to Superintendent in October 2013 and was responsible for the counties of Powys and Carmarthenshire. In September 2014 he became the Superintendent for Ceredigion and Pembrokeshire and in January 2015 moved to be Superintendent for Powys.
In September 2014 he moved to be the Superintendent for Ceredigion and Pembrokeshire, and he started his role as the Superintendent for Powys in January 2015. He moved to be Superintendent in Ceredigion in March 2017.
In December 2019 Robyn became temporary Head of Uniform Policing before returning to Ceredigion in May 2020.