Renowned for his award-winning impressions and sharp humour, he's a hit with audiences for live events after-dinner as well as being a hotly sought-after host and MC.

As the creative force behind 'Callan’s Kicks', a celebrated weekly radio satire with TV specials, comedy albums, and live shows, Oliver has firmly established himself as a leading voice in Irish comedy. He also presents his own talk programme on RTÉ Radio One, in the flagship Monday to Friday 9am slot, which has already become a central part of the national conversation. And he hosts programmes on BBC Sounds and presents the prestigious annual Irish Book of the Year Award on RTÉ One television. 

His sharp parodies and incisive commentary on political, social, and entertainment figures have earned him a place as a respected commentator, comic performer and voiceover artist.