About CWT

IAGI’s Certified Welding Technician (CWT) program recognizes the knowledge, experience and skill of those technicians who hold the certification. 

Engineers benefit from IAGI's CWT program because certification verifies that the welders on their job have experience in geomembrane welding and meet industry standards of skill for those geomembranes they are certified in. IAGI encourages all engineers to require that any welding done on their jobsite be done with CWTs.

IAGI developed the Polyethylene, PVC, Reinforced and EPDM geomembrane welder's certification programs so installers could define standards of proficiency, recognize the knowledge, experience and skills of installers, and reward those who qualify with industry recognition.

Member companies who have invested resources in training and testing their welding technicians take pride in the skill of their welding technicians. IAGI encourages you to use companies that have made this commitment to quality on your next job!


Click here for a list of companies that employ CWTs.

Tenets of IAGI's Certified Welding Technician's Program (CWT):

  • Raising the level of professionalism in the geomembrane industry
  • Commitment to meeting high standards of field performance