James Mosher is a distinguished professional hornist and private instructor, based in Boston since 1984. Since earning his Bachelor of Music Education from the Boston University School For The Arts, and the Masters degree from the Yale School of Music, he has performed with virtually all of the leading professional orchestras in New England, including the Boston Symphony and Pops, Cape Cod, Boston Ballet, Boston Lyric Opera, Opera Company of Boston, New Hampshire, Portland, Vermont Symphonies, and Rhode Island Philharmonic. He is contracted as Principal Horn in leading regional orchestras, including the Claflin Hill Symphony, Hillyer Festival Orchestra, Simon Sinfonietta, and Symphony By The Sea. For seven years Jim served as Co-Principal Horn with the Sarasota Opera Orchestra, two years as Associate Principal Horn with the Orchestra Sinfonia do Estado de São Paulo, Brazil and two seasons with the Key West Symphony.  

An accomplished performer on natural horn, Jim has appeared with significant original instrumental ensembles, including Boston Baroque, Handel & Haydn Society Orchestra, New York State Baroque, Grand Band (NY), Newport Baroque Orchestra, La Donna Musicale and many other early music ensembles. He has made numerous recordings on baroque and classical natural horn, including the Musicians of the Old Post Road, a prominent Boston-based chamber ensemble. 

As a chamber musician, Jim is founding director of the Brass Consortium, a brass quartet and quintet, which performs frequently throughout New England. Jim is also a founding member of the NEC (New England Conservatory) Horn Trio, along with Liana Zaretsky, violin and Andrew Goodridge, piano. The NEC Horn Trio actively actively performs recitals at New England Conservatory, Music On The Hill, on the Max Reger Concert Series and many other venues.

In the world of jazz music, Jim is a long-time member of the Jazz Composers Alliance (JCA) Orchestra in Boston, with whom he has made numerous recordings. Their most recent CD, featuring music by founder of the JCA, Darrell Katz, will be recorded at WGBH Studios in Boston in December, 2016.