Didier Wimmers joined Aehr Test Systems as Executive Vice President of Research and Development on March 3, 2025, succeeding Avi Ray Chaudhuri. Before joining the Company he held executive engineering management positions at Schlumberger Automated Test Equipment, NPTest, Inc., Credence Systems Corporation, FormFactor, Inc., Altera Corporation and Thin Film Electronics ASA. He brings extensive semiconductor test equipment engineering and research leadership experience to the Company's R&D organization.