Upon further receiving a bursary from the Ministère de l'Éducation (Québec) [fr],[6] Denise Massé went on to study piano and accompaniment for the next three years with Dieter Weber and Erik Werba in Vienna, and with Gerald Moore in London.

From her early interest in opera, Denise Massé continued on as repertory pianist at Ottawa University, Orford Musique [fr], and the National Arts Center, working with Mario Bernardi.

[7] In 1994, Denise Massé began working at the Metropolitan Opera under music directors James Levine and Yannick Nézet-Séguin, and shortly afterwards became a Vocal Arts faculty member at the Juilliard School (1998-2018)[8] in New York City.

As an accompanist or vocal coach for many artists throughout the years, including Maya Plisetskaya,[3] Vincent Warren, and singers–Lorraine Hunt Lieberson, Cecilia Bartoli,[3] and Renée Fleming;[9] Denise Massé also worked with young singers of the MET's Lindemann Young Artist Development Program (2012-2018), taught at the Curtis Institute (2006-2012) in Philadelphia, and was involved in programs at Ravinia's Steans Music Institute in Chicago, the Music Academy of the West in Santa Barbara, the Internationale Meistersinger Akademie in Germany, the Sociedad Internacional de Valores de Arte Mexicano (SIVAM), and the Canadian Vocal Art Institute[10] in Montreal, among others.

Stage director Fabrizio Melano dedicated his production of Charles Gounod’s Faust at the Savannah Voice Festival in memoriam.