Ronan graduated with honours from UCD School of Architecture in 2007. He joined McCullough Mulvin Architects, later becoming a director.
In his time at McCullough Mulvin Ronan helped to deliver a number of national and international award-winning projects including the Beaufort building for University College Cork and the Medieval Mile Museum in Kilkenny City, which was shortlisted for the European Union Prize for Contemporary Architecture - the Mies van Der Rohe Award - in 2019.
Accredited by the RIAI as a Grade 2 Conservation Architect, Ronan has extensive experience in the assessment, careful conservation and restoration of some of Irelands most important buildings and has lectured nationally and internally on conservation practice.