Petrol station chain Topaz has named Emmet O'Neill to be chief executive designate as the company plans to expand in the coming year.
"We aim to build a world-class retail and fuel business and to expand our operations significantly over the coming years," Mr O'Neill said.
He will take over from Sean Corkery on February 1.
The 35-year-old O'Neill founded Smiles Dental nine years ago and created a business with 78 branches in the UK and Ireland.
He sold the Smiles Dental business earlier this year.