Robert William Koer, 80, of Peoria, AZ passed away July 11, 2010. Born in Salt Lake City, UT, Mr. Koer served in the US Marine Corps in Korea. A Civil Service Engineer, he retired after 29 years of service at Hill A.F.B. in Ogden, Utah, moving to Peoria in 1998. Survivors include his daughter Suzanne Schilffarth of Sebring, FL, sons Joseph Koer of Portland, OR and Michael Koer of Wittmann, AZ; brother Jacob (Jean) of Ogden, UT; 6 grandchildren and 7 great grandchildren. He was preceded in death by wife Mae Koer. Memorial services will be held at 1:30 p.m., Friday, July 16, 2010 at National Memorial Cemetery of Arizona, 23029 N. Cave Creek Rd., Phoenix, AZ.