Complex sentence: In early 1988 he worked at Numeri Tech, a small machine shop located in Stockton, and from July to October as a boilermaker in Portland, Oregon, living in Sandy with his aunt.
Split into simpler sentences: In early 1988 he worked at Numeri Tech, a small machine shop located in Stockton. From July to October 1988 he worked as a boilermaker in Portland, Oregon, living in Sandy with his aunt.