Mario Coello was born in Valencia, where he studied fine arts at the San Carlos University, after which he decided to move to Milan to specialise in design at Istituto Marangoni.
He developed his career as a designer with a number of significant labels that have marked the history of fashion, ranging from Italian pret-à-porter to the delicate craftsmanship of French haute couture.
After his first experience as a design assistant for Gianfranco Ferré in Milan, he moved to Rome to join Valentino's design team for four years.
In 2013, he moved to Paris where he worked as Giambattista Valli's assistant. He later became a designer for Elie Saab and his work was split between Paris and Beirut.
In 2016, he decided to head home and settle in Madrid, where he founded his brand and premièred with his collection at the MBMFW.