Joe Moran has stood down from his role as non-executive chairman of the IFG group. The new chairman is John Gallagher.
Mr Moran said: "He has managed and led businesses across many sectors."
Cara Ryan was also co-opted to the board.
Mr Moran said the structures had undergone significant change within the past 18 months, beginning with the appointment of Evelyn Bourke and following those of Robin Phipps and David Paige.
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Mr Moran and his family owned Manor Park Homes before it entered receivership.
He announced his intention to step down last June.