85, of Sun City, Arizona went to our heavenly Father, Sunday, December 16, 2012. Mr. Walker was born in Casper, Wyoming, September 22, 1927. He grew up in Aruba and was a graduate of Blair Academy and Cornell University. Throughout his lengthy and successful career Mr. Walker held positions as both a chemical and nuclear engineer. A beloved father of six children, he is survived by his wife of 58 years, Betty and his son Dr. John Walker (Kathy), Sally Cable (Alex), Ann Walker (Joe Brykalski), Beth Hughes (Paul), Jennifer Fritsch (Steve) and 13 grandchildren. He is pre-deceased by his parents, brother and oldest daughter, Mary Katherine Costello. Memorial services will be held at 11:00 a.m. Friday, Dec. 21, 2012 at Menke Funeral & Cremation Center Chapel. Memorials may be sent to Covenant House, 461 Eighth Avenue, New York, NY 10001 or at www.covenanthouse.org. The family of Vincent A. Walker wishes to thank Hospice of the Valley and Nightingale Homecare.