Before 2001, Jack spent ten years as a director at Weber Shandwick Scotland.
Trimedia’s Edinburgh-based director Nicky Hawkins will replace him in the post of Scotland MD from 1 July, taking on additional control for the Glasgow office.
Hawkins reports to Trimedia UK chief executive Vickki Stace.
As well as Robert Wiseman, the agency’s clients in Scotland include Ernst & Young, KLM Royal Dutch Airlines and the John Lewis Partnership.
Trimedia International chief executive Michael Murphy said it would be making ‘significant new hires’ in the coming weeks.
The agency’s Scottish operation reported annual growth of 30 per cent in 2005.
Robert Wiseman sold 1.4bn litres of milk last year in the UK.