Served on the Iowa Supreme Court from February 1, 1929, when he was appointed in compliance with a legislative Act increasing the personnel from eight to nine members, until he resigned September 15, 1932.
Born in Henry County, Illinois, December 21, 1866, In 1877 the family moved to a farm near Williamsburg, Iowa. He was graduated from the Law Department of the University of Iowa in 1890 and began the practice of law at Cedar Rapids where he formed a partnership with a son of former Justice Rothrock. For six years he was County Attorney of Linn County.
After his retirement from the bench he returned to private practice of the law at Cedar Rapids.
Justice Grimm died at Cedar Rapids December 22, 1943.