In the wake of the climate crisis and the need to achieve global climate goals, the transition to renewable energies needs to happen at a faster pace, including in Thailand.  In order to ensure that no one is left behind and to protect the well-being of affected workers and their families, a Just Energy Transition is crucial.  The workers of Thailand’s largest energy producer, EGAT (Electricity Generating Authority of Thailand) feel uncertainty about their employment situation, which requires swift and well-informed long-term strategies by their employer and related authorities.  This paper presents the essential findings and recommendations of an in-depth study in Thai conducted in 2021.  The study is inspired by the evolving discourse of a just energy transition in Thailand and highlights its critical dimensions, with a specific focus on the electricity generation sector.  It explores the pivotal role labor unions play in shaping organizational strategies for job restructuring and gathers insights from union members on the ongoing transition towards sustainable energy practices.