He is currently one of five professional referees at the Welsh Rugby Union, alongside Craig Evans and Adam Jones.

He was part of the Welsh Rugby Union referees academy in 2013, where in February 2014, he was selected for the 2014 IRB Junior World Rugby Trophy tournament in Hong Kong, which saw him referee the final between Tonga U20 and Japan U20.

[2][3] Later that year, he appeared in his first British and Irish Cup, and was selected by the four home unions to officiate the final between Leinster A and Leeds Carnegie.

He later made his Champions Cup debut, refereeing Leicester Tigers v Benetton Treviso on 16 January 2016.

[6] On 18 June 2016, Whitehouse had his first World Rugby international appointment, assistant referee for the second and third test of Ireland's tour of South Africa.