Barber has a brief to spearhead a Chelsea FC-style commercial and marketing effort for the famous London football club.
Barber will join in July in what is understood to be an executive director post, PRWeek can reveal.
The club wants to better compete with London rivals Arsenal and Chelsea, on and off the pitch, and is to confirm Barber's hire this Friday.
He will be charged with better exploiting the Spurs brand in the UK and overseas and will manage all the club's commercial and marketing activities.
Barber was first linked with the Spurs job late last year (PRWeek, 26 November 2004).
The lifelong Spurs fan will remain on the board of parent Ogilvy & Mather as a non-executive director.
Barber joined Ogilvy 13 months ago. He has also held comms jobs at Barclays, Inchcape, Bhs and Abbey National.
He will sit on a four-strong board alongside chairman Daniel Levy, executive director Matthew Collecott and sporting director Frank Arnesen.
Spurs posted pre-tax profits of £1m for the six months to 31 December 2004. Although turnover dipped from £33.2m to £32.9m, operating profits of £5m, prior to player trading, were an improvement on £3m losses the previous year. The club lies 14th in Deloitte's list of Europe's richest clubs.