MARSHALL — Mike Holmberg and Carley Postma announce their engagement. Parents of the couple are Stan and Brenda Holmberg of Marshall and Delwyn and Corinne Postma of Ireton, Iowa. Holmberg graduated in 2013 from Gustavus Adolphus College in St. Peter with a degree in biochemistry. He is employed at Ralco Nutrition in Marshall as a product manager. Postma graduated in 2015 from Southwest Minnesota State University in Marshall with a degree in elementary education. She is a first-grade teacher at Park Side Elementary in Marshall. The couple plans a July 15, 2017, wedding at Living Word Lutheran Church in Marshall.