Breaking NewsNames in the News Donald Leo Mulligan March 1, 2010 Tennant Co. has appointed Donald Leo Mulligan to its Board of Directors.Tennant Co. has appointedDonald Leo Mulliganto its Board of Directors. Mulligan has extensive experience in international financial management and operations. Share This Story You must login or register in order to post a comment. Report Abusive Comment Thank you for helping us to improve our forums. Is this comment offensive? Please tell us why.