Complex sentence: Once CEO, Powell rehires Henry Masterson to use his Headmaster units to begin Sumdac Systems' entry into military weapons making, using loopholes to keep Masterson from being arrested.
Split into simpler sentences: Once CEO, Powell rehires Henry Masterson to use his Headmaster units to begin Sumdac Systems' entry into military weapons making. Porter even used loopholes to keep Masterson from being arrested.