HDI Certification Testing
HDI is the world’s largest membership association for the service and support industry. HDI’s mission is to lead and promote the customer service and technical support industry by empowering its members through access to timely and valuable industry information, encouraging member collaboration through events and online forums; and establishing internationally recognized, standards-based industry certification and training programs.
Program Information
HDI Membership
Become a part of the largest worldwide network of support professionals, or to obtain further information on the benefits of becoming a member
HDI Industry Events
In addition to certification, HDI produces the highest-rated industry event, the HDI Annual Conference and Expo, offers regional training, and publishes a wide range of training publications and research materials. Membership exceeds 7,500 with members from every continent worldwide.




