Complex sentence: Galbraith was a professional staff member for the U.S. Senate Committee on Foreign Relations from 1979 to 1993, where he published many reports about Iraq and took a special interest in the Kurdish regions of Iraq.
Split into simpler sentences: Galbraith was a professional staff member for the U.S. Senate Committee on Foreign Relations from 1979 to 1993. During that time, he published a number of reports about Iraq and took a special interest in the Kurdish regions of Iraq.