Trehy began his opera career in the 1950s singing roles with several leading opera houses in Germany for four years and also working extensively as a concert artist in
Austria. He also performed leading roles at several important International music festivals, including those in
Berlin, the
Netherlands,
Wiesbaden, and
Belgrade. After returning to the United States in the late 1950s, Trehy performed with opera companies and orchestras throughout North America up into the mid 1980s. He notably starred as Heathcliff in the world premiere of
Carlisle Floyd's
Wuthering Heights at the
Santa Fe Opera in 1958, and portrayed "The Son" in the world premiere of
Hugo Weisgall's
Six Characters in Search of an Author with the
New York City Opera in 1959. His other opera credits include performances with the
ABC Opera Company,
Opera Company of Boston, the
Central City Opera, and the
Washington National Opera among others. As a concert singer, Trehy has performed with the
Boston Pops under conductor
Arthur Fiedler, the
Detroit Symphony, the
Saint Louis Symphony Orchestra, the
Cleveland Orchestra, the
Pittsburgh Symphony, the
Denver Symphony, and in various concerts at NYC's
Town Hall and
Carnegie Hall. He also sang in the world premiere of
Earl Wild's
oratorio Revelations. From 1966–1969 he served as the
cantor at
St. Patrick's Cathedral, New York. In 1969 Trehy joined the voice faculty at
Pennsylvania State University where he taught concert and opera vocal repertoire. He worked there for fourteen years, and after retiring in 1983 was made a professor emeritus. He was also a fellow at the Penn State Institute for Arts and Humanistic Studies. He lived in retirement in
State College, Pennsylvania until his death on November 23, 2009, of pneumonia. ==References==