Complex sentence: He was a lecturer at Keele University from 1958 to 1963, a fellow at Yale University in 1963-4 and then moved to the University of Essex in 1964, where he founded the Department of Government.
Split into simpler sentences: He was a lecturer at Keele University from 1958 to 1963. He moved to the University of Essex in 1964, where he founded the department of Government.