Mr. Hartman has sung with virtually all of North America’s major opera companies,orchestras and festivals, mixed with frequent appearances in Italy, Germany, Spain, Norway, Austria, France, Japan and elsewhere. Among his best-known portrayals are Rigoletto, Scarpia (Tosca), Don Giovanni, Germont (La Traviata), Falstaff, Marcello (La bohéme), Gianni Schicchi, Amonasro (Aïda) Pentheus (H. W. Henze’s The Bassarids), Michele (Il tabarro) and Emile de Becque (South Pacific). Known in the Pioneer Valley for his work with UMass Opera Workshop, Mr. Hartman most recently directed his new adaptation of Carlo Goldoni’s play The Servant of Two Masters for Smith College. Next month he will sing the title role in Verdi’s Nabucco in Chicago. Mr. Hartman first appeared with the SpringfieldSymphony in 1993 as Escamillo in Carmen, and most recently performed Copland’s A Lincoln Portrait for the SSO’s opening gala in 2011.