Since coming out of the Conservatoire d’art dramatique of Montréal in 2007, Cynthia has accumulated primary roles in numerous TV series such as Trauma, Tactik, L’Appart du 5e, Mémoires vives, Plan B, L’Âge adulte, Alix et les merveilleux, Virage, Le 422, Une autre histoire and Classé secret. She was part of District 31’s seven seasons, where she played the role of Da-Xia Bernard, which won her a nomination at the Prix Gémeaux in 2018 for «Best supporting female role : annual drama series». On the web, we have seen her in Vidanges. She is also part of the cast of Bête noire.

In theatre, we have been able to see her on the stage of the Théâtre Denise-Pelletier among others, in the plays  L’Avare, La princesse Turandot, Médée, puis Prouesses et épouvantables digestions du redouté Pantagruel. She was part of the creation process of the play Yukonstyle, put on in 2013 at the Théâtre d’Aujourd’hui. She was also puppeteer for the show Alice au pays des merveilles, from the Tout-à-Trac company. In 2019, she was part of the cast of Consentement performed at the Théâtre Jean-Duceppe, directed by Frédéric Blanchette. Cynthia makes a comeback to theatre on the stage of the TNM with Le rêveur dans son bain  and Projet Polytechnique and at the Théâtre d'Aujourd'hui in Beau gars.

On the big screen, she embodied Jade Bossé in the film L’Empire Bo$$é, directed by Claude Desrosiers. More recently, she played Julie in L’Origine des espèces from director Dominic Goyer. This role won her a Gala Québec Cinema nomination for «Best supporting actress» in 2017.