WY-Hazmats are Weyland Personnel in service for Weyland-Yutani on LV426. They first appear in the level Battle for Sulaco as they battle against Winter, O'Neal and Bella, while others try to flee the USS Sulaco.
There are two different WY-Hazmats, WY-Hazmat Soldiers who carry guns and WY-Hazmat Scientists who are mainly found in the Facility.
Reference stats table.
Appearances in the following;
Aliens: Colonial Marines
WY-Hazmat Scientists wear yellow Hazmats suits are unarmed and are mainly found in the Derelict or cocooned in various locations.
WY-Hazmats Soldiers battle against Marines and the Xenos in the game Aliens: Colonial Marines, they appear in the levels Battle for Sulaco and Sulaco Falls aboard the USS Sulaco and on the surface of LV426 in The Raven, For Bella, One Bullet and Rampart. WY-Hazmat Scientists appear in both single and multiplayer (in multiplayer they are mainly cocooned).