On November 21-22, 2023, the School of Energy and Environment (SEEN), University of Phayao, underwent an assessment for ISO 14065: 2020 and ISO/IEC 17029: 2019 systems of the Greenhouse Gas Management Certification unit (GMC). This assessment took place at GMC unit as part of the follow-up process for the second certification cycle for the standards of the certification unit's usability and the review of greenhouse gases were revised and adjusted. The assessment was accompanied with the presence of Assoc. Prof. Dr. Torpong Kreetachat, the Dean, along with specialized members was welcomed the examining team led by Ms. Pacharaporn Phojaeng, the Head of the examining team along with Mr. Rattha Siricharoen from the National Standards for Quality Assurance Office, Ms. Jittima Boongerd, and Mr. Thada Worunchotikul from the private sector's Greenhouse Gas Management Organization. The purpose of this assessment was to maintain and enhance the quality standards of the GMC unit continuously.