Complex sentence: Barlow entered the inteligence community with two years of work at the Arms Control and Disarmament Agency; he then, in 1985, entered the CIA, where he collated and examined information about nuclear programs in the Third World.
Split into simpler sentences: Barlow entered the inteligence community with two years of work at the Arms Control and Disarmament Agency. He then, in 1985, entered the CIA, where he collated and examined information about nuclear programs in the Third World.