[1][2][3][4][5][6][7] Kirdahy's upcoming projects include the 2024 Broadway revival of Gypsy, starring six-time Tony Award winner Audra McDonald and directed by five-time Tony Award winner George C. Wolfe,[8] the new Broadway musical Just in Time, starring Tony Award winner Jonathan Groff as Bobby Darin,[9] and the film adaptation of the Terrence McNally, John Kander, and Fred Ebb musical Kiss of the Spider Woman, written and directed by Bill Condon and starring Jennifer Lopez.

[34] The advent of the AIDS crisis steered him towards dedicating his early professional career to fighting for LGBT causes and providing free legal services for people with HIV/AIDS.

[1] For many years, he was highly active at the Manhattan Lesbian, Gay, Bisexual, and Transgender Community Center, from its early days when ACT UP was forming to when he became a part of the Executive Board where he played a critical role in expanding its cultural programs.

[35][36] He was the co-Chair of the East End Gay Organization which would eventually lead him to meet his future husband, playwright, Terrence McNally, as well as LGBT figures like Edith Windsor, the plaintiff in the landmark Supreme Court case that led to the legalization of same-sex marriage.

[44] The New York Times described the Tony nominated play as "an ambitious attempt to dramatize the head-spinning changes in Gay America", and "a resonant elegy for a ravaged generation".

[48] The cast included Nathan Lane, Matthew Broderick, Megan Mullally, Rupert Grint, Stockard Channing, F. Murray Abraham, and Micah Stock.

[57] A portion of the play's profits were donated to PEN International, an association of writers working to promote literature and defend freedom of expression around the world.

[58] The idea of a new weekly guest star attracted a rotating cast of performers including Whoopi Goldberg, Nathan Lane, Martin Short, Darren Criss, Alan Cumming, Bobby Cannavale, Billy Porter, Cynthia Nixon, Tony Danza, Brian Stokes Mitchell, and many more.

[59] The creative team included Terrence McNally (Book), Stephen Flaherty (Music), and Lynn Ahrens (Lyrics), and was directed by Tony Award-winner Darko Tresnjak.

[69] After a sold-out run at the Young Vic, the production began previews on June 16, 2018, at the Playhouse Theatre in the West End and ran until November 3, 2018.

[70][71] His other productions in the West End include the 2012 revival of Terrence McNally's Master Class, starring Tyne Daly as Maria Callas, and Edward Albee's The Goat, or Who Is Sylvia?

[77] Kirdahy and the other lead producers were determined to move the show with the original cast intact, and they worked to overcome the travel ban.

[81] In the same year, Kirdahy produced a Tony-nominated revival of Frankie and Johnny in the Clair de Lune by Terrence McNally starring six-time Tony winning actress Audra McDonald and two-time Oscar nominated actor Michael Shannon.

[15][14][12] The 2019 production featured Jonathan Groff as Seymour, Tammy Blanchard as Audrey, and Christian Borle as Orin, with direction by Michael Mayer.

This revival made history as the first Broadway production of an August Wilson play to be directed by a woman[86] and garnered critical acclaim, with Helen Shaw of The New Yorker calling it “in a word, magnificent.”[87] On April 26, 2023, Kirdahy’s world premiere production of the new Kander and Ebb musical New York, New York opened at the St. James Theatre, with direction and choreography by Susan Stroman.

Grey House marked the Broadway debut of playwright Levi Holloway, and starred Laurie Metcalf, Tatiana Maslany, and Paul Sparks, alongside Sophia Anne Caruso and Millicent Simmonds.

In celebration of the Supreme Court's decision to legalize same-sex marriage in all 50 states, they renewed their vows at New York City Hall with Mayor Bill de Blasio officiating on June 26, 2015.