He roars, and whistles! He even plays music? Oh well, this guy is one can short of a six-pack, that alien. With a huge amount of hitpoints, matching it's size, he makes the biggest of commanders look like rag dolls. Not one commander can survive alone. It is recommended for every Juggernaut, 4 people fight it. He can fire over map features with eye gun and blast his way through with his arm cannons. He does have short range radar, and getting close to him is suicide.
The only way to beat a Juggernaut is not going head on!
Or perhaps there is a way...