Mark Mullery has worked in various roles in both broadcast and feature animation, including as an editor, as a supervisor of both compositing and animation, and as an episode director for broadcast. He has worked for Cartoon Saloon since 2013 when he began as an animator on Song of the Sea. Since then he has also served as technical director and composite supervisor on Netflix’ Puffin Rock, technical director on Nora Twomey's The Breadwinner, and most recently as assistant director on Tomm Moore and Ross Stewart’s feature film Wolfwalkers.