RSM Tenon has lost six partners to East Midlands rival Mazars, including Nottingham managing partner Alistair Wesson and Leicester office managing partner Chris Darlington.
Julian Clough, Steve English, David Hoose and Bob Johnson have also joined Mazars, with the firm planning on opening a new office in Leicester.
Phil Varty, UK senior partner at Mazars, said: “We welcome such a strong set of talented individuals into the firm to help expand our business in the East Midlands. Mazars in the UK has experienced strong growth in recent years, despite the difficult economic background.
“We have ambitious plans to further build on this success and bringing in these individuals is very much in line with our growth strategy for the next four years.”
Mazars has 116 partners and over 1,250 employees working across 17 offices in the UK. The firm has yet to confirm to which offices the new hires will be appointed.
Last month, Mazars completed the acquisition of UK immigration services provider Sarah Butler Associates. It also announced in late 2012 that it would be opening a new office in the North East following substantial contract wins within the public sector.
RSM Tenon has suffered mixed fortunes recently. The accountancy firm announced a £5.5m arbitration settlement in early May that could lead to profits of £2.8m for 2013.
However, RSM Tenon confirmed that the company has not yet reached agreement with its sole lenders, Lloyds, to reset the terms of its lending facility.