Harry D. Seibert has been appointed head of sales for Mettler-Toledo Safeline in the U.S. Mr. Seibert is an experienced sales executive with a diverse background in industrial business.   He joins the company from Polypore International, Inc., where he served as vice president of global sales and business development for the Daramic lead-acid separator business. Prior to joining Polypore, Mr. Seibert progressed through a number of sales, marketing and management positions at Avery Dennison and w...