Eric Dillner played Don Ottavio in Don Giovanni, Don Curzio in The Marriage of Figaro, Count Almaviva in The Barber of Seville, Gastone and Alfredo in La Traviata, and the Duke and Borsa in Rigoletto. Eric Dillner has also portrayed roles in The Tales of Hoffmann, The Abduction from the Seraglio, The Magic Flute, Die Fledermaus, Tosca, Candide, Salome, Madame Butterfly, The Mikado, and several other operas. Companies with which Eric Dillner has appeared include New York City Opera, Chautauqua Opera, Virginia Opera, and Opera Theatre of St. Louis.
In a concert capacity, Eric Dillner has appeared with the Milwaukee Symphony Orchestra, the Missouri Symphony Society, the Connecticut Chamber Choir, and the Lake Charles Symphony, performing works by Handel and Bach as well as opera arias and oratorios. Eric Dillner has also performed with the Swedish Radio Orchestra and the Brussels Festival Orchestra, and as well as in concerts in Denmark, Germany, and Holland.
As a recording artist, Eric Dillner was featured as a vocal soloist on the Orchestra of the Old Fairfield Academy's recording, Complete Mozart Wind Concerti Volume III - Horn. Eric Dillner is represented by Music Masters Classics/BMG.
Eric Dillner has won several vocal competitions, including the Mobile Opera Competition and several prizes offered by the National Association of Teachers of Singing, Great Lakes Region. Eric Dillner was also a finalist in the Bel Canto Opera Competition, the MacAllister Awards - College Division, and the Metropolitan Opera Competition - Mid-Atlantic All-District.
Eric Dillner has conducted vocal studios for V.O.I.C.Experience at Walt Disney World (2004 to 2009) and given masterclasses at the Classical Singer Convention (2006 and 2008) and at several universities, colleges, and high schools. Eric Dillner has also served as a festival adjudicator in the United States and in China.
Since 1998, Eric Dillner has pursued a career in opera/operetta direction, producing Albert Herring, Carmen, La Traviata, the Barber of Seville, and Cosi fan tutte, among other opera classics. Since 2009, Eric Dillner has dedicated himself to Strategic Nonprofit Analysis and Planning, an art-production consulting firm which he founded and operates.