In the 1990s, he entered the film industry, with his producing, arranging, orchestration, and pianistic work being featured on soundtracks for "Mulan", "What's Love Got to Do With It?", "The Birdcage", "Licence to Kill", and "Pocahontas". His first film score was for the 2002 film "John Q," which won a BMI Film Music Award. This led to his first major television score, for the 2004 Showtime production "Crown Heights", and to his first film score for a major motion picture "The Notebook", for which he won multiple BMI Awards. In March 2020, Billie Eilish revealed 32 songs which inspired her Grammy-winning album "When We All Fall Asleep Where Do We Go?." "Jesse's Bridge," a song composed by Zigman from his soundtrack for the Disney movie Bridge to Terabithia, was listed as one of the inspirations for Eilish's ILOMILO. Zigman has composed both chamber and full orchestral works on commission, including a viola sonata; "Impressions", a suite for wind ensemble (premiered by the USC Symphony Orchestra); the 1994 tone poem "Rabin: An Orchestral Work in Five Movements" (premiered at Los Angeles' Westside Pavillion on December 25, 1997, repeated in Spring 1999 by the Los Angeles Jewish Symphony under the direction of Noreen Green in memory of Yitzhak Rabin, and recorded live on the Bernard Milken Jewish Community Campus in March 1999); "Martyrology: A Tribute to Those Who Have Died in the Face of Persecution"; "Vis Vitae" (mixed octet, featured at the historic Beverly Hills Presbyterian Church on Rodeo Drive as part of the "Voices of Hollywood" concert at the Third Annual Beverly Hills International Music Festival in 2006 and in Zigman's score for "Flash of Genius"; and a "Rhapsody for Cello and Piano" (premiered/recorded in 2015 by Andrew Shulman and Robert Thies). His vocal music includes a setting of "Shir L'Shalom" (also recorded live on the Bernard Milken Jewish Community Campus in March 1999); two "Ave Maria" vocalises (one written with bassist Abraham Laboriel, Sr., composed as the main title song for the film "Virgin of Juarez" and one written for the main title song of the film "John Q", featuring Joshua Bell on violin); an Emmy Award-winning setting of the Hebrew prayer for peace"Sim Shalom" (from the Showtime TV film "Crown Heights", with Alex Brown); and an Italian aria with chorus ("La Donna in Viola," setting a translation of Ntozake Shange's poem “Pyramid”, for 3 soprano soloists and SSAAT choir, also featuring Joshua Bell) featured in the film "For Colored Girls" (2009-2010).