MacMullan was a sequence director on The Simpsons Movie, and in 2009 she was a member of the Pixar team working on the animated film Newt prior to its cancellation.
mˈæk mˈʌlən wʌzɐ sˈiːkwəns dᵻɹˈɛktɚɹ ɔnðə sˈɪmpsənz mˈuːvi, ænd ɪn tˈuː θˈaʊzənd nˈaɪn ʃiː wʌzɐ mˈɛmbɚɹ ʌvðə pˈɪksɑːɹ tˈiːm wˈɜːkɪŋ ɔnðɪ ˈænɪmˌeɪɾᵻd fˈɪlm nˈuːt pɹˈaɪɚ tʊ ɪts kˌænsɪlˈeɪʃən.