Director and shareholder Peter Cameron has been appointed executive director. His former roles include fleet sales manager at Fiat Auto UK.
Bryan Phillimore has become chairman of both Network and Forester Grant.
Lee Paice is sales executive for the southern region. He joins from Sixt Rent a Car and has several years' experience, including nine years as branch manger at Hertz Rent a Car.
Mario di Maria, the new sales director, joins from Italy, where he was a senior Alfa Romeo area sales manager.
Matthew Clarke, the group's new fleet director, brings several years' fleet industry experience and joins from Citroen. Raffaella Zapparoli has also joined the UK team to work on dealer marketing programmes with Culkin.
Chris Howell, founder of Fleetsafe subsidiary DriveTech, becomes chairman of the Fleetsafe group after 15 years at DriveTech. Jim Kirkwood is now managing director at DriveTech and Steve Harris has been appointed chief executive of Data Programmes, another Fleetsafe subsidiary. Kirkwood joins DriveTech from Fujitsu-Siemens Computers, where he was responsible for consumer business.