A 1995 graduate of the Faculty of Veterinary Medicine at the Université de Montréal, Dr. Cosimano set up an ambulatory veterinary service for companion animals as soon as she finished her studies. In 1998, she joined forces with her brother, Dr. Michel Cosimano, and together they created the Hôpital Vétérinaire de l’Est, after the existence of the Clinique Vétérinaire de l’Est.
In 2005, Dr. Cosimano and her brother became owners of the Clinique Vétérinaire À Mon Chat, and in 2006, they took over full management. Their association with Dr. Catherine Lavoie in 2012 led to the creation of Hôpital Vétérinaire du Richelieu, then with Dr. Émilie Piché-Rondeau in 2014, they transformed the clinic into À Mon Chat, À Mon Chien, Hôpital Vétérinaire Inc. In 2017, the three establishments officially founded Groupe Vétérinaire MONVET Inc.
Also in 2017, Dr. Cosimano, his brother, and Dr. Lili Bergeron, IPSAV, acquired Clinique Vétérinaire Bertomeu Inc. which they renamed Clinique Vétérinaire Au Pied du Mont Inc. bringing to four the number of establishments in the group.
In addition to her management, Dr. Cosimano is a passionate practitioner, specializing in general pet surgery at Hôpital Vétérinaire de l’Est Inc.
She shares her daily life with several animals, including Houdini, an Italian Levrette dog, Leila, a Great Dane bitch, Rose, a Siamese cat, Amen and Bulle, two Abyssinians, as well as her Canadian Quarter Horse, a pony named Cannelle, and numerous chickens.