Sinéad began a career in acting in New York City, appearing in Hugh Leonard’s Da and The Country Boy both directed by the late Chris O’Neill for the Irish Bronx Theatre Company. Off-Broadway appearances include Sharon directed by the veteran stage and screen actress Geraldine Fitzgerald at the 91st Street Playhouse, Brian Friel’s Lovers Losers with Chris O’Neill at the Irish Arts Centre and Our Lady of Sligo, a joint production of the Irish Repertory Theatre and Out of Joint, London, with Sinéad Cusack. Regional American theatre appearances include Dancing at Lughnasa at the Asolo Repertory Theatre in Sarasota, Florida and Indiana Repertory Theatre, Indianapolis. Sinéad has appeared at the acclaimed Mabou Mines Theatre & Abrons Arts Centre in New York City in various experimental theatre productions.
Sinéad founded Banba’s Crown Theatre Company with her husband Michael and four other New York based Irish actors. For Banba’s Crown she directed and performed in alternative adaptations of JM Synge’s Riders to the Sea and The Tinkers Wedding presented at the first New York International Fringe Festival. Also for Banba’s Crown, Sinéad directed Samuel Beckett’s Catastrophe and Micheál macLiammóir’s The Importance of Being Oscar for the New York Irish Festival of the Arts in Soho, NYC, and has directed her husband Michael in the current highly acclaimed production.