Raef Bjayou believes The Apprentice turned him into a "great leader", despite being axed from the show.
Bjayou, 27, said he was fired by Sir Alan Sugar because he was not "gritty" enough.
The ever-confident entrepreneur said he was dropped by the business tycoon because he was not as "in your face" as his rivals.
He said: "I learnt a lot about myself on The Apprentice, about how I can improve myself as a businessman.
"I learnt that as a leader if you are put in charge of a group of people, to use the legal jargon, the burden of proof is on you to prove what other people's skills are.
"It's important when leading a team to draw out the skills of other people, even when they might not be so forthcoming with those skills.
"A good leader inspires confidence in him, but a great leader inspires others to have confidence with themselves. That's what I did.
"Before going on The Apprentice I didn't give people the time of day if I believed their first impressions.
"That didn't bring out their skills. Now I try to prise those skills out of them."
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