He has acted on stage, on television and in several movies, including The Molly Maguires (1970), The Brink's Job (1978), Q (1982), Brewster's Millions (1985), The January Man (1989), Beyond the Pale (2000), and Ash Wednesday (2002).
He had appeared on three New York City-based soap operas: Ryan's Hope, Search for Tomorrow, and One Life to Live.
He is also known for his annual Christmas-time appearances on All My Children as Father Clarence, a priest who shows up to give inspirational advice to Pine Valley citizens.

In the 1970s he hosted a talk show on WMCA.

In 1970, McCourt released an album, And the Children Toll the Passing of the Day.

In recent years he has occasionally appeared on various programs on New York City's political radio station, WBAI.
Among the shows on which he has appeared has been Radio Free Éireann.
He is also a regular guest artist at the Scranton Public Theatre in Pennsylvania, having performed in Inherit the Wind, Love Letters and A Couple of Blaguards which he co-wrote with brother Frank McCourt.
Currently, Malachy has been hosting a call-in radio forum on WBAI, airing on Sunday mornings at 11 am.
He also had a short-lived role as a Catholic priest on the HBO prison drama Oz.
He was the owner of Malachy's, a bar on Third Avenue in New York.
One of his frequent patrons was actor, and friend, Richard Harris, who although famous worked for a short time behind the bar for McCourt.
McCourt played Francis Preston Blair in Gods and Generals (2003).
He has acted on stage, on television and in several movies, including The Molly Maguires (1970), The Brink's Job (1978), Q (1982), Brewster's Millions (1985), The January Man (1989), Beyond the Pale (2000), and Ash Wednesday (2002). He had appeared on three New York City-based soap operas: Ryan's Hope, Search for Tomorrow, and One Life to Live. He is also known for his annual Christmas-time appearances on All My Children as Father Clarence, a priest who shows up to give inspirational advice to Pine Valley citizens.
In the 1970s he hosted a talk show on WMCA.
In 1970, McCourt released an album, And the Children Toll the Passing of the Day.
In recent years he has occasionally appeared on various programs on New York City's political radio station, WBAI. Among the shows on which he has appeared has been Radio Free Éireann. He is also a regular guest artist at the Scranton Public Theatre in Pennsylvania, having performed in Inherit the Wind, Love Letters and A Couple of Blaguards which he co-wrote with brother Frank McCourt. Currently, Malachy has been hosting a call-in radio forum on WBAI, airing on Sunday mornings at 11 am. He also had a short-lived role as a Catholic priest on the HBO prison drama Oz. He was the owner of Malachy's, a bar on Third Avenue in New York. One of his frequent patrons was actor, and friend, Richard Harris, who although famous worked for a short time behind the bar for McCourt. McCourt played Francis Preston Blair in Gods and Generals (2003).
Malachy McCourt