More than 80% of his practice is devoted to legal matters concerning clients involved in art including auction houses, museums, artists, art galleries, art collectors and dealers, appraisers, banks, insurance companies, and foundations. He represents clients in both litigation and transactional planning and counsels them on a variety of art-related matters. He also chairs the Art Law Committee of the New York City Bar Association. The Court accepted Mr. Cahill as an expert in art transactions and received his written report into evidence as his direct testimony.