McNulty Kanadaning Britaniya Kolumbiyasi shtatidagi Pentikton shahrida tug'ilgan. U uchta aviatsiya filmida rol o'ynagan: "Falling from the Sky: Flight 174" filmida Uilyam Devane bilan, "Final Descent" filmida Robert Urich bilan va "Snakes on a Plane" filmida Samuel L. Jackson bilan. U Bill Kondonning "The Man Who Wouldn't Die" (1995) filmida Rodjer Mur va Nensi Allen bilan birga qo'shimcha rol o'ynagan. McNulty 2009 yilda "The Uninvited" filmidagi qayta ishlangan versiyasida ham paydo bo'lgan, bu yerda u "A Series of Unfortunate Events" filmining Emili Brauning bilan birga ishlagan. Shuningdek, u "Supernatural" teleserialining "Faith" epizodida Rev. Roy Le Grange rolini o'ynagan.
