US wine and spirits group Brown-Forman has announced that its chief winery officer Steve Dorfman is to step down from his post, after 25 years' service.

Brown-Forman has appointed Tim Nall, currently director of the company's processing and bottling operations, as general manager of its winery operations, with effect from 1 June. The company said that Nall will oversee the full integration of Brown-Forman's winery operations into its Global Production Organization.

Dorfman joined Fetzer Vineyards as a winemaker in 1982 and stayed with the company after its acquisition by Brown-Forman in 1992, working initially in grower relations and later becoming head of Brown-Forman's Wine Estates Group. Since 2003, he has been responsible for the company's overall wine production as chief winery officer.

Dorfman will remain with the company until 30 June to assist with the transition.