White-Smith starts at Newsquest, which is the UK's second-largest regional newspaper publisher, this week as the managing director of Newsquest Media Sales. He replaces Lisa Bourne, who left last year.
Newsquest is owned by the US media company Gannett and operates 300 newspapers, including 17 daily titles.
Last September, the publisher acquired Exchange & Mart and Auto Exchange from United Advertising Publications.
White-Smith left the Telegraph Group following its acquisition by the Barclay brothers in 2004.
He said: "My role is primarily to grow revenues, get Newsquest up the agenda and broaden its appeal."
Daily publications in the Newsquest portfolio include the Evening Times in Glasgow, The Argus in Brighton, the Southern Daily Echo, the Oxford Mail and The Northern Echo. It also publishes The Herald and the Sunday Herald in Scotland, in addition to owning a number of specialist magazines and website properties.
White-Smith is the latest national newspaper sales director to move into the regional press following the decision in 2004 of Lawrie Procter, the commercial director of The Independent, to join the sales house MediaForce.