Bridgett left to join Multiplex, the Australian construction firm in charge of the Wembley Stadium project (PRWeek, 31 Aug).
Dr Helen Hill has been promoted from manager of press and PA to director, filling the role left vacant by Bridgett. Hill's previous role has been split in two.
Meanwhile, Jeff Postlewaite joins as head of press from ad and design agency BSP creative, of which he was a founder partner.
The head of public affairs role has been filled by James Forde, who has moved from senior press and PA executive - a role he has held since he joined in November 2004.
Both Postlewaite and Forde report to Hill, who heads a full-time communications team of five for the Chamber.