Meet Our Team > Mary Kay Lafrenz Email Mary Kay Mary Kay is the office manager and joined the firm is January 2002. Mary Kay keeps the office sane and the staff on target. She is very efficient, multi-tasks well, and has an instinctive knowledge of what needs to be kept track of. Prior to joining Su, Mary Kay worked for Applied Industrial Technologies for 26 years and was collections manager for 37 stores in the Northwest.