Dilling is proud to have earned accredititation from the organizations listed below. You can rest assured that our skilled, professional employees will deliver service that is second to none.

• American Society of Mechanical Engineers (ASME)
  • Certified for fabrication of: process/power piping (PP) , repair of pressure vessels (R), and fabrication of unfired vessels (U)
• American Society of Heating, Refrigerating & Air Conditioning Engineers (ASHRAE)
• American Welding Society
• Associated Builders & Contractors, Inc. (ABC)
  • Winner of multiple Awards of Excellence
• Environmental Protection Agency (EPA)
  • Licensed for: backflow preventor testing and refrigeration handling
• Medical Gas Certification
• National Society of Professional Engineers (NSPE)
• Staff engineers are degreed and licensed
• We hold all required state and local licenses for: boiler installation, electrical work, HVAC, plumbing and process piping
• Federally approved apprenticeship program
• Licensed plumbers
• Licensed electricians
• Certified welders
• Member of National Fire Protection Association (NFPA)