Calvin and Patricia Duffield of Grand Ridge are pleased to announce the engagement of their daughter, Rachel, to Shawn Monahan, son of Kevin and Joy Monahan of Rockwell City, Iowa. Rachel is a 2009 graduate of Marquette High School and a 2015 graduate of Drake University in Des Moines. She works as an outpatient clinical pharmacist at the VA Medical Center in Des Moines. Shawn is a 2010 graduate of Rockwell City-Lytton High School and a 2014 graduate of the University of Iowa. He works as an accountant for John Deere Financial in Johnston, Iowa. The wedding will be held at St. Ambrose Cathedral in downtown Des Moines on October 26, 2019.