Senior partner at Grant Thornton, Paul McCann, is to take over as chief executive of Irish cloud and managed services company Ergo.
John Purdy, the co-founder and current CEO of Ergo, is to move to the position of chairman once Mr McCann takes over in September.
The change will see Mr McCann switching roles as he has been the chairman of Ergo since 2015.
"The opportunity to become Ergo CEO dovetailed perfectly with my own aspirations to lead a company at the cutting edge of business-critical technologies," Mr McCann said.
"I have always had the utmost respect for Ergo as a highly skilled IT provider and as an employer of talented people who are synonymous with its success."
Mr McCann led Grant Thornton in the role of managing partner from 2012 until 2017, before becoming senior partner in the firm's financial services advisory department.
Last September, Mr McCann was named interim chief financial officer at Permanent TSB.
Ergo said Mr McCann will lead a growth-through-acquisition strategy at Ergo, which has annual revenues of in excess of €95m.
"It became clear to me some time ago that Paul would be a natural to succeed me if he was available," Mr Purdy said.
"He has a deep understanding of our business and values, combined with a growth mindset and focus on customers that has always been the engine of Ergo’s success."
Ergo currently employs 450 people and earlier this year announced plans to create 60 jobs as part of a multimillion euro investment in the business.