She quickly landed a Vogue cover, a magazine in which she was featured numerous times throughout her professional life.

After several years in the United States, Montserrat returned to Mexico City where she appeared in Ramona, the first of many telenovelas for the Spanish-language broadcast network Televisa, which included "Sin Pecado Concebido", "Mujeres" and "La Madrastra".

After Ramona, Oliver starred in her own Televisa show, "Las Hijas de la Madre Tierra", which she co-produced and co-hosted with close friend Yolanda Andrade.

During this time, Montserrat also served as national spokesperson and brand image for selected global companies, like Coca-Cola, L’Oréal Paris, and Lancôme among others.

[3][4][5] In addition to her high-profile media presence in Mexico, Montserrat Oliver owns several businesses: a clothing line called Royal Closet, Barbara Coppel used to be her business partner ;[6] a line of sunglasses called MO Lunettes du Soleil;[7] a talent agency, Jerry ML, which represents artists for commercial work throughout Mexico; and, a production company which specializes in producing commercials.