In order to become a CM, the RSES member must first pass an exam that tests them on knowledge required to install and service refrigeration and air conditioning equipment. "CM-level members are recognized industry-wide as having achieved a superior level of HVACR knowledge," the society said. The exam is based heavily on theory and practical applications.

The members awarded CM status include Willard L. Hamby, John Miller, Anzel Norman Jr., and Joseph S. Terranova, all of the First State Chapter, Wilmington, Del.