Complex sentence: His notable accomplishments are sustained development of the economy of Norfolk and Chair of the South Central Ontario Region (SCOR) which is a five-county economic development coporation consisting of Brant, Elgin, Middlesex, Oxford and Norfolk.
Split into simpler sentences: His notable accomplishments are maintaining a "sustained development" plan for Norfolk County's economy and becoming Chairman of the South Central Ontario Region (SCOR). The SCOR is a five-county economic development corporation consisting of Brant, Elgin, Middlesex, Oxford and Norfolk.