Polk Mechanical Company, Hits 3 Year Injury Free Milestone - Apr 22, 2011 Jon Grime Promoted to DFW Commercial Group Manager - May 2, 2011 Polk Mechanical Company Receives ASME “R” Stamp - May 18, 2011 Polk Mechanical Company, is proud to announce the accomplishment of achieving 3 years without an OSHA recordable injury in it’s Houston office... Polk Mechanical Company, is proud to announce the well deserved promotion of Jon Grime to the position of DFW Commercial Group Manager. Jon will be responsible for Polk Mechanical Company, is proud to announce the receipt of their Certificate of Authorization and R stamp ...