MARSHALL - Joanna Stern and Corey Jerzak announce their engagement. Parents of the couple are the Rev. John and Susan Stern of Apple Valley and Daniel and the late LuAnn Jerzak of Ivanhoe. Stern is a 2001 graduate of Murray County Central High School, a 2005 graduate of Southwest Minnesota State with a degree in business management and finance and a 2010 graduate of SMSU with a master's degree in leadership. She is employed as a state and local tax analyst at US Bank in Marshall. Jerzak is a 1997 graduate of Lincoln HI and a 2001 graduate of South Dakota State University in Brookings with a degree in ag systems technology. He is employed as a territory manager for Ziegler CAT in Marshall. The couple plans a Dec. 14, 2013, wedding at St. Stephen Lutheran Church in Marshall.