John Sumerlin has performed in the US, Canada, Mexico and Europe as soloist through Artistry Associates Management. As first violinist of the Harrington String Quartet he was a finalist in the Banff International String Quartet Competition, and with the Harrington played over 60 concerts a year in the US and Mexico. He has been a first violinist in the Dallas, Cincinnati, American, and Honolulu Symphony Orchestras, as well as the Santa Fe Opera Orchestra, and Concertmaster of the Amarillo Symphony Orchestra, with which he was the featured soloist in over forty concerts with conductor Thomas Conlin. He has been Artist in Residence at Dalhousie University (Halifax, NS) and the West Texas A & M University (Canyon), and on the faculty at S.U.N.Y Purchase. Since 1989 Sumerlin has taught violin, viola, and chamber music at Rhode Island College, as well as conducting the Rhode Island College Chamber Orchestra. He also serves as Concertmaster of the RIC Symphony Orchestra. In 2010 he and colleagues Samuel Breene, Susan Culpo and Steven Laven co-founded the Proteus String Quartet, which is now in its sixth season.