Waltham - Mr. Joseph G. LeBlanc, of Waltham, died Saturday, August 30, 2008 at Lahey Clinic Medical Center in Burlington. He was 75. Born in Rumford, Maine a son of the late Emile and Alice (Cormier) LeBlanc, Joe was an engineer for the Raytheon Corporation for many years until his retirement. He had lived in Waltham for over fifty years and served with the United States Air Force during the Korean War. He leaves his wife, Peggy (Lally) LeBlanc; one son, David M. LeBlanc and his wife, Maria, of Barcelona, Spain; one daughter, Judith A. Hall and her husband, Daniel, of Sudbury; three brothers, J. Eric LeBlanc of Randolph, Ernest LeBlanc and Paul LeBlanc both of Gardner; three sisters, Helen Walsh of Feeding Hills, Doris Comeau of Manchester, Connecticut and Diane Lupazck of Gardner; five grandchildren, David J. Hall, Matthew R. Hall, Brian D. Hall, Tracy M. LeBlanc and Kaley M. LeBlanc and many nieces and nephews. Joe was also a brother of the late Cecile Cormier. Relatives and friends are invited to attend the Funeral at 9:30 a.m. Wednesday from The Joyce Funeral Home, 245 Main Street (Rte.20), Waltham followed by a Funeral Mass in Saint Jude Church, 147 Main Street, Waltham at 10:30 a.m. Burial will be in Calvary Cemetery, Waltham. Visiting hours will be held on Tuesday from 4 to 8 p.m.