'I hired Dan as a trainee when I was joint-MD of Countrywide Porter Novelli.
As he developed his skills, his confidence grew.
'He would frequently crash his way into my office after coming back from a credentials meeting, saying: "We can win this. You need to get involved.
We need to do something. Now."
'He is both an entrepreneur and a salesman. I have not worked with anyone with such an infectious will to win or with an intuitive feel for a stand-out idea.
'He was never fazed - for him, the bigger the client name, the more he believed we were going to win it. Want to be challenged? Hire your own Dan The Man. Just be brave enough to light the fuse, be prepared for the odd fire - and see what happens.'
Dan Holliday is joint founding partner of The Fish Can Sing.