Born in Lebanon, Mohamed Haidar obtained a first Bachelor's degree in Computer Science at the American University of Beirut, before studying singing at the National Conservatory of his country in the class of Kévork Karamétélian. He pursued his music studies in Switzerland at the universities of music of Geneva and Lausanne in the classes of Marcin Habela and Stephan MacLeod, earning a Master degree in Vocal pedagogy and a Master degree in music interpretation. During his studies, he received the Colette Mosetti Foundation Scholarship. At the Opéra de Lausanne, he made his debut as Ramirez in La belle de Cadix by Francis Lopez. Among the roles he played on stage: Il conte Almaviva in W.A. Mozart's Le nozze di Figaro, Escamillo in Georges Bizet's Carmen, Belcore in G. Donizetti's L’elisir d’amore, John Sorel in Gian Carlo Menotti's The consul, as well as several roles in contemporary opera creations. In concert, he regularly performs sacred music repertoire including works by Johann Sebastian Bach, Joseph Haydn and Felix Mendelssohn.