Complex sentence: McDade took charge and brought back Michael Gelband and Alex Kirk, who had previously been pushed out of the firm by Gregory for not taking risks, while Fuld remained CEO he soon became isolated from McDade's team.
Split into simpler sentences: McDade took charge and brought back Michael Gelband and Alex Kirk, who had previously been pushed out of the firm by Gregory for not taking risks. Although Fuld remained CEO, he soon became isolated from McDade's team.