Complex sentence: His first broadcasting job was in the late 1960s with KMSC radio station in Clear Lake City, Texas and moved to Houston radio station KTRH, where he hosted a nighttime call-in show.
Split into simpler sentences: His first broadcasting job was in the late 1960s with KMSC radio station in Clear Lake City, Texas. He moved up to Houston, Texas, radio station KTRH, where he hosted a nighttime call-in show.