Piezoelectric actuators provide high positioning accuracy and rapid dynamic response, making them well suited for ap-plications requiring non‑magnetic behaviour, radiation compatibility, high force‑to‑volume ratio, reliable unpowered holding force, and resistance to vibrational environments. However, during high‑frequency or continuous operation, these actuators may experience significant self‑heating, particularly when operated in vacuum or elevated‑temperature envi-ronments. To address these challenges and enable reliable operation of piezo actuators in extreme conditions, the Euro-stars-funded PROOFED project was launched. It brings together Cedrat Technologies (CTEC) as project Coordinator working on the piezo motor design, CSEM for thermal modelling and thermal drain development, and CTS for the de-velopment of high temperature piezo stacks. Results include experimental validation of 10 billion of actuations at tem-perature up to 200°C, thermal drain with 41% thermal resistance reduction and new definitions of RSPA Rotary Stepping Piezo Motors offering wide operational thermal range and resistance to magnetic fields as well as vibration and shocks.