Complex sentence: Conway entered the polling business with Wirthlin Group, a GOP polling firm and also worked for Luntz Research Companies before founding her own firm, The Polling Company, in 1995, in which she consulted on consumer trends, often regarding women.
Split into simpler sentences: Conway entered the polling business with Wirthlin Group, a GOP polling firm. She also worked for a period for Luntz Research Companies before founding her own firm, The Polling Company, in 1995, in which she consulted on consumer trends, often regarding women.