Rev. Zimmerman was born in Heidelberg, Baden, Germany, in 1858. Orphaned at the age of eight, he later came to the United States when he was 25, and he graduated from Eden Seminary. A family man with eight children, he was a man of strong determination.
He was conscientious and sincere. During his short time at Bethel, the local prohibition movement divided the community and the congregation. Zimmerman was asked to sign a petition preventing the local saloon from obtaining a license, but he declined refusing to become involved. In May 1912, he resigned.
His last congregation was in North Dakota where he died in 1918.