Nardi made his stage debut in a 1978 production of Solzhenitsyn, directed by Alexander Hausvater. Since then, he has performed in over 60 plays including For Those in the Peril on the Sea, Sandinista, Nineteen Eighty-Four, La Storia Calvino, A Flea in Her Ear and The Lesson.
He received a Montreal Gazette Critic's Award in 1979 for his role in an adaptation of George Orwell’s Nineteen Eighty-Four, a Dora Mavor Moore Award for Artistic Excellence – Collective – in 1985 for La Storia Calvino, garnered a Dora Award nomination in 2001 for his role in A Flea in Her Ear, and a Dora Award in 2002 for Outstanding Performance for his role in The Lesson. In 2007 he received a Best Actor Thespis Award for Two Letters.
A four-time Genie Award nominee, he has won twice for Best Actor for roles in The Saracen Woman (La Sarrasine) (1992)[8] and My Father's Angel (2001), for which he had also received a Best Actor award at the Sonoma Wine and Country Film Festival in 2000. He received the Guy L’Écuyer Award for his role in La Déroute in 1998. In 2010, the year marking the 30th Genie Awards, he made the Academy's 30th Anniversary Top 10 list in the Lead Actor category in Canadian cinema – a ranking based on the number of wins and nominations over the 30-year period.
Nardi is co-author with Vincent Ierfino of the play La Storia dell'Emigrante. Written in Calabrian, English and French, the play was the first in Canada (on record) written by an Italian-Canadian and addressing an Italian-Canadian reality. In 1982 La Storia dell'Emigrante received the first James Bullet Award for Best Original Canadian play at the Ontario Multicultural Theatre Festival.
A Modo Suo: A Fable, written in Calabrian in 1990, received a Dora Award nomination for Best Play. An English translation was published in its entirety in the Canadian Theatre Review in 2000.
He collaborated on the screenplays for La Sarrasine and La Déroute.
Two Letters (2006), two theatrical monologues based on two actual letters sent to a film/television producer and two theatre critics,[9][10][11] received a 2007 Dora Award Nomination for Outstanding New Play. "...And Counting!" - a postmortem of "Two Letters" and journey into the state of culture and funding in Canada[12] was presented in 2008 in Toronto and Montreal, at Factory Theatre and McGill University, respectively and in 2010 at the Festival TransAmeriques in Montreal. In 2008 he was nominated for a Siminovitch Prize in Theatre for playwriting.[13]
"Letter One", "Letter Two", and "...And Counting!" were filmed in front of a live audience and released respectively in 2011, 2013 and 2014.[14] "Letter One" was screened at Les Rendez-vous du cinéma québécois in Montreal in 2011,[15] at Hot Docs in Toronto in 2012 and the Italian Contemporary Film Festival at the Toronto International Film Festival (TIFF) in 2012.[16] "Letter Two" was screened at the Italian Contemporary Film Festival at TIFF in 2013.[17] "...And Counting!" was screened at the 2014 Italian Contemporary Italian Film Festival at TIFF.[18]
Nardi began teaching acting and directing courses in Autumn of 2017. He has instructed courses at the University of Toronto and University of Toronto Scarborough, and directed courses at York University.[7] He is a PhD candidate in Performance at the University of Toronto,[19] specializing in “the impact of cultural background and first language on performance in Canadian theatre, film and TV."
In 2001, Nardi received a "Toronto Italian Filmfest Award for Major Contribution to Italian-Canadian Cinema" at the Toronto Italian Film Festival (Frank. A. Caruso, co-founder and head programmer)
In 2002, Nardi was included in "Canadian Who's Who," "the standard reference source of contemporary Canadian biographies, listing 13,000 notable Canadians selected on merit alone."
^"e-TALENTA". www.e-talenta.eu. Retrieved March 5, 2020.
^Lamey, Mary (November 5, 1999). "The little condos that couldn't: Buyer fights developers of Darcy McGee project over defects". The Gazette. Montreal. p. C1. ProQuest433540723.
Canadian Film Awards 1968–1978, Genie Awards 1980-2011, Canadian Screen Awards 2012–present. Separate awards were presented by gender prior to 2022; a single unified category for best performance regardless of gender has been presented since.