The Sheffield-based group chief executive of law firm Irwin Mitchell, John Pickering, is leaving the business after 37 years.
He said his decision to step down was based on a desire to have a settled senior management team to continue growth. He planned to to pursue a long-held ambition to hold non-executive director positions within other businesses, he added.
The news comes a week after the company announced it had secured a £60m finance package - with a further £30m if required - to fund aggressive expansion.
In the last 18 months Mr Pickering, who became group chief executive in 2011, has seen Irwin Mitchell hit £200m-a-year income for the first time, complete five acquisitions, recruit more than 30 experts into partner-level positions and announce plans for a ninth regional office in Southampton.
The chairman of Irwin Mitchell, Glyn Barker, paid tribute, describing him as “a leader and inspiration.”
The new group chief executive is Andrew Tucker, who was previously head of the personal legal services division.