The LSG Group provides end-to-end onboard products and services for the travel industry.
Bühner ran the la vie restaurant in Osnabrück from 2006 to 2018, and was awarded three Michelin stars in 2011. He now travels the world as a consultant, keynote speaker and guest chef.
As brand ambassador for the LSG Group, he will take a close look at the range and quality of the company’s culinary offering and make improvement suggestions.
Bühner said: "I am looking forward to an exciting exchange of culinary experiences.
"Enriching the gastronomic experience on board an airplane is an attractive and complex task. I am proud to be able to contribute with my experience as a brand ambassador and would like to thank everyone for the trust they have placed in me."
Jörg Hofmann, head of global culinary excellence at the LSG Group, said: “Collaborating with Thomas Bühner will be of great benefit for the entire LSG Group.
“I am personally impressed by his enormous passion for quality, his creativity and his extensive knowledge about the highest culinary standards. He will help us to refine our premium offering and host high-level customer events.
“In addition, I am delighted that he will inspire and motivate our young culinary talents with his years of experience and knowledge."