But he insists that he is not looking for 'squad' players, and says: "We don't want to bring in loan players that only make up the numbers, because if you go down that road and they have to play, they don't bring anything to the team. I want loan players that can play in the first team.
"With Rigobert Song going to Cologne until the end of the season that has freed up some money that we can use on wages to bring a couple of players in, and I am working hard on it."
It is a costly operation even though there is no transfer fee involved and Glenn adds: "No one in Europe loans out a player without what they call a 'rent', so you have to pay that on top of the wages.
"And quite often there is an agent involved somewhere who wants paying a commission for bringing the whole thing together.
"So that's the way the system is in Europe and it is an expensive business.
"You can't loan Premiership to Premiership and, although you can take players from Scotland, I don't think there are too many of those available that are what we would be looking for unless it was a Rangers or a Celtic player.
"But both those clubs rightly want to keep all their best players around them, so the only option really is to go into Europe and you are looking at players that have probably fallen out with the coach or the president and they want to move on until the end of the season.
"If it is just a player that they don't think is good enough for their club quite often you would find we had the same problem and the player wasn't up to what we would want.
"What seems an easy job just to go out and get a couple of quality loan signings is far from that, but it doesn't mean I'm not working as hard as I can.
"The deals are difficult to pull together because it is about one - finding them, two - affording the rent and three - paying the agent.
"Generally speaking we look at our own scouting system to target some players and you have to speak to as many reputable agents as you can, and see what they can bring to the table."
Various players have been mentioned in recent days as being West Ham targets, including Chris Bart-Williams, who has joined Charlton on loan, but Glenn insists: "I didn't see who we were linked to but I don't think there was anything I have been told about that there was very much truth in, so there's nothing to say."
As for Luis Ramis, the Spanish defender who played in the reserve team's 1-1 draw against Coventry City on Tuesday night, Glenn says: "We will make a decision on Ramis later in the week."
Glenn hopes a win over Aston Villa will disperse the gloom he felt after the defeat at Sunderland.
He says: "Sunderland was particularly disappointing. As much as we wanted to keep a clean sheet, we should have been able to handle Kevin Phillips' goal late on because we should have been out of sight and, to be fair to Peter Reid, he said the same thing.
"It wasn't good viewing watching the video of the game on Monday and seeing four glorious chances go by without hitting the back of the net.
"There was one good save from Michael Carrick but with the other three efforts we didn't hit the target, and we need to sharpen up in front of goal - when the chances come we have got to take them."
Glenn pinpoints Paul Merson as a potential threat even though he hasn't necessarily been starting games of late, and Glenn says: "Paul Merson is a wonderful talent. I have worked with him before with England and to be able to call someone up like him is an enviable position to be in.
"But I think he has been injured recently and was getting himself fully fit."