Ms. McClintock has appeared in film and television as well as on Broadway and Off, in London's West End, at Israel's National Theatre - the Habimah, and at major regional theatres across the country. She portrayed passenger Marion Ruth Britton in Paul Greengrass's universally acclaimed film United 93 and was subsequently honored with her castmates by the Boston Society of Film Critics which named them the Best Ensemble Cast of 2006. She recently completed filming the role of Big Sister Thomas in Our Lady of Victory scheduled for a Spring 2008 release. She performed on Broadway as Cathleen in Sir Jonathan Miller's production of Long Day's Journey Into Night with Jack Lemmon, Kevin Spacey, Peter Gallagher, and Bethel Leslie; a role she reprised on film for both Showtime and PBS' American Playhouse. She was a guest member of the Royal Shakespeare Company during their Broadway and Kennedy center rotating repertories, and she also worked with the RSC's artistic director Adrian Noble on The Art of Success with Tim Curry at the Manhattan Theatre Club. She appeared Off-Broadway to great critical praise as Mrs. Purdy in D.H. Lawrence's The Daughter-In-Law (named by the NY Times as one of the top-ten productions of 2003.) Her television credits include featured roles on Law and Order: Criminal Intent and The Naked Brothers Band for Nickelodeon.

Directorial credits include: Richard III in conjunction with the opening of Al Pacino's film Looking for Richard for Fox Searchlight; a national tour of Tartuffe for the National Theatre of Performing Arts, All the World's a Stage (a compendium she created on Shakespeare's views of a life in the theatre), Wooing and Wedding (a similar piece at Studio North), The Heiress at Theatre Virginia and A Celtic Midsummer at the Angel Orensanz Center. Film directorial credits include:  Public Service Announcements for The Million Mom March and the Brady Center for Gun Control that were shown on national TV as well as on the mall in Washington DC and PSA's for the National Center for Human Rights. At NYU, she created a curriculum for Shakespeare on Film and directed shorts of Macbeth and A Midsummer Night's Dream.

She has taught at the British-American Drama Academy in both London and Oxford and at various universities including Carnegie-Mellon, Duke, Adelphi, Pitt, and Alabama (in the Alabama Shakespeare Festival's MFA program) as well as the Circle Repertory School of Theatre, the Fieldston School for the Performing Arts, the T. Schreiber Studio, and NYU: Stonestreet Studios. She currently operates the Queens Studio in Sunnyside where she privately coaches and holds classes and workshops.