Voting closes at 5pm, click here for the last chance to cast your vote.
While easyJet's Peter Duffy was the favourite to win a week ago, those who have been following the odds on Paddy Power will have seen that both BT's David James and Paddy Power's own Christian Woolfenden have overtaken him as favourites for the top award.
The winner will be presented with the award at The Marketing Society's Awards for Excellence on 5 June.
The full list of nominees:
Abi Comber, head of brand and marketing, British Airways
Peter Duffy, group commercial director – customer, marketing and product, easyJet
Michael Inpong, marketing and R&D director, Muller Dairy
Catherine Kehoe, managing director, retail brands and marketing, Lloyds Banking Group
David James, marketing director, Consumer Division, BT
Sheila Mitchell, marketing director, Public Health England
Rupert Thomas, marketing director, Waitrose
Christian Woolfenden, global marketing director, Paddy Power