Quest Gates Partnership is set to recruit a further 12 senior executives - mainly from Capita McLarens.
And a selection of Capita's major clients may follow suit.
Quest Gates senior property director, and ex-Capita executive, Chris Hall said: "After carrying out extensive research into the marketplace we found clients were unhappy with the service from big loss adjuster companies. We have secured a few key clients, some from Capita, who we will announce shortly."
Since Capita acquired MacLarens Toplis two years ago, 36 of the original 39 senior managers have left.
Quest Gates is offering senior executives the opportunity to buy shares in the business.
"McLarens always maintained long-term relationships with clients, but when it was acquired by Capita the personal touch was lost."
Capita Insurance Services managing director Bill Dye said when Capita bought McLarens Toplis it was a "financially stressed business".
He said: "In January we integrated MacLarens and Eastgate into a single operating unit. We have created three divisions, pure outsourcing, specialist service division and claims services. We have retained the historic components of Eastgate and MacLarens and, as far as I am aware, present staff are not leaving."
Quest Gates Partnership and Gates Adjusting Partnership are merging to form a limited company.