Angela Spindler, chief executive of N Brown Group, is stepping down at the end of the month.
Spindler has been CEO of the group since July 2013, and has more than 20 years of retail experience, including senior roles at Coca-Cola, Mars, Asda, Debenhams and the Original Factory Shop.
The womens and menswear group, which owns JD Williams, Simply Be and Jacamo, said it has commenced the search for a new CEO.
Steve Johnson, who is currently chief executive of the financial services division, will step into the role of interim group chief executive.
Matt Davies, chairman of N Brown Group, said: “We recognise that now is an appropriate time to search for a new leader who can take the business forward through the next phase of its development. I would like to thank Angela for her significant contribution as CEO.
“Angela has led the business with passion, energy and a relentless focus on building on the group’s industry leading fit specialism, as well as building N Brown’s on-line capability and expertise.
“She has had to contend with significant legacy issues and a challenging retail backdrop, and has brought her great personal qualities and values to the way she has led our business.”