Dumond Chemicals Inc. has added Frank Ritter and Hans Klinck to its sales management staff. The two new hires follow the appointment of John J. Petroci III as vice president, sales and business development. Ritter was named director of sales for Northeast and target markets. He most recently served as director of commercial sales for Zinsser Co. Klinck was named regional sales manager, Western region. Prior to joining Dumond, he worked for Pratt & Lambert. Dumond Chemicals Inc. manufactures paint and coating removal products. For more, visit www.peelaway.com or call (212) 869-6350.