[2] He performed in productions of The White Album Project, Fornes's The Conduct of Life, Brecht's Threepenny Opera, Shakespeare's Titus Andronicus, Shaw's Man & Superman, Durang's Naomi In The Living Room and Maeterlink's The Intruder.
After graduating from NYU, Cummings began performing as a company member in two of New York City's downtown theater & dance companies, Big Dance Theater and The Builders Association, with whom he toured extensively, performing in festivals across US, the UK, and Europe.
[3] He later performed with The Flea Theater,[2] in Mac Wellman's Sincerity Forever, Cleveland, and Three Americanisms, as well as the melodrama Billy the Kid written by Walter Woods in 1903.
He was an understudy in the Off-Broadway play The Guys and in the Broadway revival of Frankie and Johnny in the Clair de Lune'.
[5] Cummings subsequently relocated to Los Angeles to work in television and film in addition to theatre,[4] where he is best known for playing Ned Weeks in Larry Kramer's The Normal Heart, Patsy in The New Electric Ballroom by Enda Walsh, Mitch in Reunion at South Coast Repertory, and Mitchell in Daniel's Husband at The Fountain Theatre.