Westcon acquired Crane in 2007, and Grant remained with Westcon's Convergence division after the integration.
Reporting to group president and CEO Dean Douglas, Grant will take on responsibility for driving the growth of the firm's European strategy.
"[The] European business is developing in a positive way," said Douglas.
"We are expanding into the Nordics, Baltics and southern Europe, and we continue to strengthen our vendor portfolio overall," he continued.
Grant added: "We will continue to help vendors and resellers increase their productivity to drive competitive advantage.
"Our strong relationships with key convergence vendors and a skilled reseller community sets us apart from our competitors. We intend to drive a strategic plan and investment model that allows us to continue to maintain this competitive advantage," he said.