A resident of South Sioux City, he served part of a term in the Nebraska Legislature. Giese was mayor of South Sioux City. In 2008, he was elected to represent the 17th Nebraska legislative district in the Legislature.
He sat on the Education, Government, Military and Veterans Affairs, and State-Tribal Relations committees.
He resigned from his legislative seat after being elected Dakota County treasurer in 2010.
Married Nancy Ann Giese. Children: Jonathon R., Robert J. Junior, Benjamin A., Season A.