Alfa Romeo have appointed Alessandro Alunni Bravi as team representative following Frederic Vasseur's exit to Ferrari.
Part of the Sauber Group since 2017, Alunni Bravi's new role effectively fills that of a team principal and he will "represent the team in all official functions at race weekends and away from the track".
The appointment marks one of the first major tasks completed by Andreas Seidl, who joined as the new CEO of the Sauber Group last month from McLaren.
"I am delighted to confirm the appointment of Alessandro Alunni Bravi to the role of team representative, in addition to his existing duties of managing director of the Group," Seidl said.
"His vast experience in motorsport has equipped him with all the tools he needs to succeed, and his intimate knowledge of the team, of which he has been part for more than five years, will ensure stability and continuity in our progression.
"Alessandro representing the team during the Formula One championship will allow me to focus on growing the Group and preparing for the challenges and opportunities that await us.
"I thank Alessandro for his belief in our vision and I welcome him to this additional position: I am convinced this is another valuable addition to what is without any doubt a very strong team, from the drivers to the management team, to each one of our employees, capable of building on last year's success and creating a bright future for Sauber."
The team is entering a transitional period this year, with the Alfa Romeo naming deal expiring at the end of the 2023 season and will be replaced by Audi, who officially enters F1 in 2026.
Testing ahead of the new season begins in Spain next month, with the first race taking place in Bahrain on March 20.