If you've watched Alien 3 real close, you will notice two commandos that look strange and stick out from the rest. You first come across these two commandos during the Company's arrival. They are seen behind Bishop II carrying a large cage. These two commandos have been nicknamed "The Dog Catchers" by myself and a few others. A bit of a strange name to dub these two right? Well, there is a reason for this and here's why:
First, let us look at what these two are wearing:
At first glance, you will notice that they are both wearing a chain-mail sort of padded suit, mainly around the Shoulder, arm and leg areas. This resembles a Dog trainer's bite suit. These bite suits are worn by Dog trainers and are designed to withstand bite attacks, protect and prevent injuries to the trainer.
Notice that they are also carrying a pole device with a rope hoop on the end. This is a Dog Catchers Lasso. This is used to catch dogs by putting the looped end over the dog's head. The other end of the pole are the ends of the rope which they pull on to tighten the hoop. This isn't to strangle the dog but to restrain it and to manoeuvre the dog into either a cage or van. Seeing how the commandos brought a cage with them it seems obvious what they intended to do.
You'll notice the strange cage-like helmet the Commandos are wearing. This looks like a form of Bite helmet dog trainers also use to protect their heads from bites and other injuries. Looking at their helmets it doesn't look like it would protect them from the Alien that much. The Aliens inner jaw could easily make the gaps killing them.
Judging from their uniforms and equipment they planned to corner and capture the Alien like a stray Dog and cage it. However, this is just a theory. If this was the case, then IMO this shows how little the Company knows about the creature. If they knew what they were up against, they would have come properly prepared and better equipped, as Ripley said, "They can't control it, they don't understand it, it will kill them all" and by looking at their methods of capturing the Alien this would be stating the obvious.