The search for a new Denver fire chief is expected to get under way immediately following Wednesday's announcement that Chief Larry D. Trujillo's last day is Saturday.

Trujillo, 47, was granted an occupational disability retirement Tuesday by the Fire and Police Pension Association of Colorado. The staff made its decision after three independent physicians unanimously agreed Trujillo should be given the early disability because he suffers from numerous back ailments, said Bill Morris, the association's chief executive officer.

Deputy fire Chief James A. Sestrich will take over as interim chief of the department.

According to the city charter, the mayor could replace Trujillo from a pool of Denver's 38 assistant chiefs, including the deputy chief and the six division chiefs.

Spokeswoman Sarah Moss said Mayor John Hickenlooper plans to start the selection process immediately.

Trujillo said he applied for occupational disability in June after he was told by his doctor last November that his back trouble, which includes three herniated discs, could cause him to lose his ability to walk. He was hurt on the job seven years ago .

"What can I say, I'm leaving the most wonderful career in the world, but I had to do what's best for my family," the outgoing chief said Wednesday.

Trujillo said he would like his permanent replacement to continue his policy of trying to ensure a diversified department.

"I have nothing but excellent things to say about Larry Trujillo," fire Capt. Kevin Duncan, president of the Colorado Black Professional Firefighters Association, said. "As president of our organization I really appreciate all the help he's given me and our organization in trying to achieve more diversity."

Contenders

Three names have emerged as possible front-runners to replace Fire Chief Larry Trujillo.

• James Sestrich, deputy chief. Sestrich, who has worked for Denver Fire since July 1976, has been named interim chief. He said he's "definitely" interested in the job but that more than 30 people in the fire department are eligible.

• Joseph Gonzales, division chief. When asked if he was interested in being chief, the 35-year veteran said he would "cross that bridge" when the time came, "but I'm holding out hope that (Trujillo will) stay around because he's been a good man to work for."

• Nick Nuanes, division chief. Nuanes, another 35-year veteran, said he was among the top three candidates being considered for the job last time. He said he's still interested, but "nobody's described any kind of a process yet. It's ultimately up to the mayor."