France, 9th March 2026
Celestia Callisto has announced the appointment of Rémi Rayet as its new Chief Executive Officer.
Rémi steps up from the role of Chief Operating Officer of Celestia Callisto, specialists in radio frequency and cryogenics based in France’s Aerospace Valley near Toulouse, a position he held for four years. With responsibility for business management of cryogenic products and services including design and development, customer support, training and maintenance, he has been instrumental in delivering strategic growth to the business and building its reputation as a leader in the sector.
His career with Celestia Callisto has been characterised by a series of milestones achieved over a twenty-year period with the business. After joining as an intern in 2006, he was quickly promoted to Thermal Engineer and then Project Manager before becoming Business Unit Manager in 2012.
A cryogenics engineer by training, Rémi has amassed a deep understanding of Celestia Callisto’s core technologies that, whilst the business grows, has ensured engineering quality remains at its core.
Speaking about his new role, Rémi says, “It is a privilege to lead the company where I began my career two decades ago. My journey has always been driven by a passion for our engineering capabilities. As we move forward, I am eager to leverage our unique expertise in radio frequency and cryogenics, to drive innovation and contribute to the shared success of the Celestia group.”
