Bam Construct and Bam Nuttall have both appointed new chief executives from their existing boards.
Graham Cash will replace from Richard Gregory as chief executive of Bam Construct on 1 April. Gregory will retire from the firm after 43 years.
Stephen Fox will become chief executive of Bam Nuttall, also on 1 April. Current chief executive Martin Rogers will retain his executive board roles at parent company Royal Bam Group.
Bam Construct and Bam Nuttall have a combined annual turnover of approximately £1.75bn.