Complex sentence: Parmer also served as head of the Humanitarian Response Bureau of the U. S. Agency for International Development where he was responsible for emergency U. S. response to over 80 declared disasters both natural and man-made around the world.
Split into simpler sentences: Parmer also served as head of the Humanitarian Response Bureau of the U. S. Agency for International Development. He was responsible for emergency U. S. response to over 80 declared disasters both natural and man-made around the world.