Bulldoozer

"Bulldoozer" Flange (Red helmet) is seen talking to Modem Doozer (Yellow helmet)

A "bulldoozer" is a Doozer bulldozer operator. The word itself is a combination of those two words. The term is first heard in Season Two episode "The Doozer Contest." After the Architect, a Bulldoozer is the head of the construction crew. An unnamed Bulldoozer performed by Tim Gosley appears in the episode "Sprocket's Big Adventure."