He had run Ateed but resigned after the Audit office's report into the V8 races in Hamilton criticised councillors and Redman for steep cost blowouts.
Redman felt his work with the Blues would be heavily weighted towards the commercial and leadership part of the business.
"We are blessed by a highly credentialled rugby coaching staff led by Sir John Kirwan and others and it is my job to create an environment for them to be successful," Redman said. "There are plenty of experts in rugby. They don't need another one sitting at the CEO's desk."
Redman had been consulting for private clients since his last public appearances.
His name was synonymous with the V8 event in Hamilton and there was a report into that which he felt was "fundamentally flawed" but he decided then to step down from his Ateed role.
"I resigned as a result of the Audit New Zealand report that was critical of the V8 experience in Hamilton and my view was that it was difficult to run a major events agency in Auckland with that controversy."