Membership & Certification
Certified Commissioning Specialist (CxS) Certification Program
In addition to the Certified Commissioning Authority (CxA), ACG offers an entry-level certification, the Certified Commissioning Specialist (CxS), for those who do not yet have sufficient experience to qualify for the CxA. (Note: From its inception in 2007 until May 2026, this certification was called the Certified Commissioning Technician (CxT).)
CxS candidates must work for an ACG member company for a minimum of 6 months, under the supervision of a CxA who recommends them for the CxS certification. Additional prerequisites for CxS certification include a minimum of two years of commissioning or other relevant experience (e.g. field testing, controls verification, or other aspects related to verification and testing of building systems). (Note: licensed P.E.s or architects need only one year.)
The CxS exam is a 4-hour, closed-book, 115 multiple-choice question examination based on the ACG Building Systems Commissioning Guideline (Part I only) and ASHRAE/IES Standard 202-2024 — The Commissioning Process Requirements for New Buildings and New Systems. The test is available through ACG’s network of testing centers across the world. (Please note: all certification candidates must complete and submit a CxS application with all supporting materials and meet the prerequisites before they will be entered into the system to schedule their exam.)
Click here to complete the online version of the CxS Application.
Click here to download a pdf version of the CxS Application.