Nan has designed costumes for opera, ballet, film, television and theatre productions. Her costume designs have been seen in David Mamet's feature films House of Games, Things Change and Homicide as well as in Mamet's Broadway production of Speed The Plow and the Pulitzer Prize-winning Glengarry Glen Ross, for which she received a Hollywood Dramalogue Award. She has designed costumes at Goodman Theatre, Court Theatre, Northlight Theatre, Steppenwolf Theatre, Lincoln Center, Alliance Theatre (in Atlanta), Kansas City Repertory Company, McCarter Theatre in Princeton, Manhattan Theatre Club, Hartford Stage Company, Arena Stage, Seattle Repertory Theatre, A Contemporary Theatre (in Seattle), the Kennedy Center, New York Shakespeare Festival, Oregon Shakespeare Festival and Chicago Shakespeare Theater, where she received a Joseph Jefferson Award for Best Costume Design for Much Ado About Nothing. Nan is the recipient of the Michael Merritt Award for Design and Collaboration. ​​​​​​​​​​In 2017, >DePaul University granted her the Via Sapientiae Award, the institution’s highest recognition for excellent service and accomplishment.