He replaces Jonathan Goring who has become partnerships director for the group.
Coleby brings with him over 24 years of experience at Laing O’Rourke where he started as a trainee.
He spent time as managing director of UK Infrastructure to later become the managing director of UK construction and most recently commercial director for Europe and Middle East.
John Morgan, chief executive of Morgan Sindall Group, said: “I am excited to welcome Steve Coleby to the team at Lovell and the Group.
“Steve will bring with him some fantastic experience including his knowledge in both building and infrastructure.”