1. violin and string pedagogy at the University of Maryland in College Park. He has appeared as soloist and chamber musician throughout North America, Europe, Australia, and New Zealand and is in demand as workshop clinician, adjudicator and guest conductor around the world. He served as 1984–86 president of ASTA and directs the International String Workshop. His vibrato method book Viva Vibrato!, coauthored with Robert Frost, was recently published by the Neil A. Kjos Music Company.