Grzegorz Chlewicki

External Consultant - Satellite Software and Engineering

Grzegorz Chlewicki is an external consultant with long-standing experience in spacecraft system engineering, with particular expertise in AOCS, avionics, and on-board autonomy. He holds a Ph.D. in Astrophysics from the University of Leiden and has been active in the European space industry for more than three decades, contributing to major scientific and commercial missions. His experience covers all phases of spacecraft development, including system and subsystem design, specification and implementation of on-board software and FDIR functions, AIT/AIV, launch campaigns, and in-orbit operations support. He has held senior engineering and system roles on major missions such as Euclid, Galileo, Herschel–Planck, BeppoSAX, and ASTRA 1K. His technical contributions include the definition of onboard autonomy, FDIR, and contingency-handling concepts for science missions with stringent reliability requirements, as well as the resolution of critical AOCS and avionics design issues. He was the design leader of the gyroless AOCS for Beppo SAX (safe and science observations mode), which allowed the spacecraft to continue operations after multiple gyroscope failures and to exceed nearly three times the planned duration of the mission.