He first emerged on the theatre scene in the late 1980s creating powerful soundscores blending original music and abstract sound design. His industrial music score for Sophie Treadwell's Machinal at the New York Shakespeare Festival earned him a Village Voice Obie Award in 1991. In 1996 he won a Drama Desk Award for his musique concrete soundscore for Caryl Churchill's The Skriker, directed by Mark Wing-Davey also at NYSF.
In recent years he has also become known for his lyrical, acoustic chamber scores, particularly for his work on the plays of Tennessee Williams. Williams plays he has scored include The Glass Menagerie, A Streetcar Named Desire, Sweet Bird of Youth, The Night of the Iguana, Camino Real, Cat on a Hot Tin Roof, Summer and Smoke, A Lovely Sunday for Creve Coeur, "The Milk Train Doesn't Stop Here Anymore"and Red Devil Battery Sign.
Gromada recently composed the theme music for the new Granada USA television series, The Interrogators, which will air in fall of 2008.