Mr. and Mrs. Jay R. Bondgren of West Seneca announce the engagement of their daughter, Jill R., to Mark B. Blersch, son of Mr. and Mrs. George L. Blersch Jr. of West Seneca. Miss Bondgren is a graduate of West Seneca East High School and attended University at Buffalo. Her fiance was graduated from West Seneca West High School and New York State Police Academy. He is a state trooper stationed in Newburgh. An Aug. 12 wedding is being planned.