Former cinema student at the Sorbonne Nouvelle's school, Thomas Lambert began at Lumina Films in 2011, where he is assisting Marie Napoli in the production and broadcasting of shorts films and TV documentaries. Late 2012, he joins Rouge International's team where he works side by side with Julie Gayet and Nadia Turincev. During 5 years, he has been involved in the executive production of features french-initiative films ("The Boss’s Daughter" by Olivier Loustau, "Jailbirds" by Audrey Estrougo, "Raw" by Julia Ducournau) and to international coproduction ("The Treasure" by Corneliu Porumboiu, Mimosas by Oliver Laxe, "The Insult" by Ziad Doueiri). In 2018, he created his own production company, Tomsa Films.