 MINNEAPOLIS--BUSINESS WIRE--Tennant Company Tennant NYSE: TNC, a world leader in the design, manufacture and marketing of solutions that help create a cleaner, safer, healthier world, today announced a succession plan in which Chief Operating Officer Dave Huml will become chief executive officer on March 1, 2021, and will join the Companys board of directors. Current CEO Chris Killingstad will serve as a strategic advisor until the end of 2021. Senior Vice President of Technology and I 