Spencer Pratt is heading from "The Hills" -- and has quit filming the MTV show for the rest of the season so he can be an online crime fighter.
Spencer, who's studying software engineering at USC, says his new plan is to take on the "cyber threat" and to do his part "in maintaining the technological superiority of the U.S. military."
Pratt tells PEOPLE he'll be working for American Defense Enterprises in cyber security.
Heidi's role in the series remains intact.
