Liam P. Mulligan has music directed, conducted, and/or performed in the pit orchestra for dozens of musicals and new musical workshops in Pennsylvania, New England, and New York City. Some highlighted shows include In The Heights, Godspell, Something Rotten, Cabaret, Mamma Mia, Guys and Dolls, South Pacific, Rent, 9to5, Preludes, The Drowsy Chaperone, Cinderella, Kiss Me Kate, The Little Mermaid, Nice Work If You Can Get it, Suessical, The 25th Annual Putnam County Spelling Bee, and The Addams Family.