Mynychodd Mr Dennis Wrandawiad Cyn Penodi a gynhaliwyd gan y Pwyllgor Iechyd a Gofal Cymdeithasol ar 29 Mehefin 2022. Daeth adroddiad y Pwyllgor i’r casgliad “Yn seiliedig ar ei berfformiad a’i ymatebion i gwestiynau yn y gwrandawiad cyn penodi, credwn fod Colin Dennis, yr ymgeisydd a ffefrir gan Lywodraeth Cymru, yn addas ar gyfer ei benodi i’r swydd Cadeirydd Ymddiriedolaeth GIG Gwasanaethau Ambiwlans Cymru”.
Mr Dennis attended a Pre-appointment Hearing held by the Health and Social Care Committee on the 29 June 2022. The Committees report concluded that “Based on his performance and responses to questioning at the pre-appointment hearing, we believe the Welsh Government’s preferred candidate, Colin Dennis, is suitable for appointment to the post of chair of the Welsh Ambulance Services NHS Trust.”