Complex sentence: He is MSNBC and NBC News Chief Meteorologist, Prior Working on NBC, He was a Meteorologist at KSNT in Topeka, KS and also a Meteorologist at WTCI-TV.
Split into simpler sentences: He is MSNBC and NBC News Chief Meteorologist. Prior to working at NBC, he was a meteorologist at KSNT in Topeka, Kansas and at WTCI-TV.