Donald was born July 26, 1934, in Newton Township of Buchanan County, IA to L.J. and Rose (Burke) O’Brien. He was the last survivor of five children.

In 1955, he enlisted into the U.S. Air Force and was honorably discharged in 1958. Shortly thereafter, Donald married his love, Berneta Godard on August 1, 1959, at the Immaculate Conception Catholic Church in Cedar Rapids, IA. With this union came 5 children: Connie, Margaret, Teresa, David and Janice. In 1960, he attended Iowa State Veterinary Medical College then went into practice in 1966 in Allison, IA for 22 years. Afterwards, he worked for the USDA until his retirement. Donald and his wife, Berneta moved to Marshalltown, IA in 2000 to be closer to their beloved family.

Donald enjoyed playing cards, fishing and volunteering for Meals on Wheels. He was a member of Knights of Columbus, AVMA, Lions, Elks, AMVETS and Optimist Club.

He will be missed by his wife of 56 years, Berneta; his children, Connie O’Brien, Margie (David) Jass, Teresa Johnson, David (Lynde) O’Brien and Janice (John) Morrin; 11 grandkids and 3 great-grandkids.

He was preceded in death by his parents and siblings, Robert, James (Rosie), Fr. Joseph O’Brien, and Patricia (Butch) Green.

In lieu of flowers, memorial contributions may be made to the American Lung Association of Iowa. The family would like to express their gratitude towards Mercy Hospice for their extraordinary care and support during this time.