Comlan de Souza graduated from the University of Geneva in 2021 with a Bachelor's degree in law and in 2023 with a Master's degree in civil and criminal law. He also holds a Certificate of specialisation in legal practice from the University of Geneva, which he earned in 2022. Comlan de Souza joined the firm in October 2023 as a trainee lawyer under the supervision of Lionel Halpérin, Anouchka Halpérin and Dominique Burger.