Complex sentence: John W. Dorsey (b.1936) served as the acting President of the University of Maryland, College Park from 1974 to 1975 and as the acting chancellor of the university from August 1974 to June 1975.
Split into simpler sentences: John W. Dorsey (b.1936) served as the acting President of the University of Maryland, College Park from 1974 to 1975. Dorsey was acting chancellor of the university from August 1974 to June 1975.