Sexton will take on Rogan at the Odyssey Arena, Belfast, in a challenge for the Commonwealth heavyweight title on May 15.
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And the Norwich banger has called up former Commonwealth cruiserweight champion Corbett in a bid to be in fighting form next Friday.
Corbett, 36, has previously sparred with Rogan and is a well known figure on the Northern Ireland boxing scene.
"Darren has been a great help, every time he steps through the ropes he gives 100%," said 24-year-old Sexton.
"He's worked with Rogan in the past, and just like him he is rough and tough, so I will be in fantastic shape for my title challenge.
"I've been having some real battles with Corbett in the gym, and I'm ready for a war with Rogan on May 15. I don't think this fight is going to be for the faint hearted.
"The only way to beat Martin is to take the fight to him, and you won't see a backward step from me.
"I've been going over and over this fight in my mind, and the more I think about it, the more confident I get.
"I've got lots of respect for Martin, but I've felt great in sparring and there's no way I'm going to lose this fight."
Sexton, the Southern Area champion, has an impressive 11-1 (4) record, and like Rogan is also a former Prizefighter tournament winner.