"I think it has been a tough baptism for him but I don't think anyone following Harry was going to find it other than difficult because he was popular with fans," says Trevor, who was appointed a director of the club in the summer shortly after Glenn took over as boss.
"There was naturally a lot of speculation at the time with Steve McClaren and Alan Curbishley, then talk about Glenn's profile, but gradually he has won the fans over and organised the team well.
"The training is good, the players enjoy it, and I think he has shown people what he wants to head towards and what his ambitions for the club are.
"The difficulty, which I think everyone has accepted, is that the depth of squad was not strong enough and we have all got to work to help him change that.
"But in a difficult situation, with a squad that has been thin on the ground, I think he made the maximum of the available resources.
"We have got to help him to move things along and I think the contract will give that bit of confidence that everyone is trying to head in the right direction."
Trevor thinks good British managers are thin on the ground and adds: "I was on a commercial trip with Graham Taylor about three weeks ago when he was talking about John Gregory. There had been one or two public spats but he said the fact is, if John left, who is there to replace him?
"It is not easy to find the ready solution, and of course you are locking yourself into big contracts with big compensation, so that is why perhaps it was felt a good coach like Glenn should be given the opportunity."
Trevor says there is already an eye on the 2002-2003 campaign, and adds: "In the first half of the season he has shown he can do a good job for the club, and there is continuity there. The players have responded and now everyone has to try to help, between now and the start of next season, give that extra depth so we can go into the season much more confident right from the off that we have a squad that can compete."