Caitlin Williston and Rob Erickson are engaged to be married on May 5 in Oklahoma City. Caitlin, of Edmond, OK, is the daughter of Jim and Rhonda Williston, of Edmond. She is a graduate of the University of Oklahoma. She is currently a media buyer. Rob, of Austin, Texas, is the son of Sharon and Paul Erickson, of Woodinville, WA and Lisa and Dennis Griffith, of Kirkland, WA. He is a graduate of Arizona State University, Sandra Day O’Connor College of Law. He is currently an estate services liaison with Wells Fargo in Austin.