Dr. Cheri Collins

Cheri Collins 
attended the Manhattan School of Music on full scholarship and was one of two freshmen violinists chosen that year to study with Raphael Bronstein. After graduation, Dr. Collins played first violin in the São Paulo Symphony in Brazil, the Florida Orchestra in Tampa, the American Chamber Orchestra, and has had a varied and successful freelance and teaching career in the Northern Virginia/Washington D.C. area for the past thirty years.
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Ms. Diana L. Chou

Diana Chou
, cellist and conductor, began her cello instruction at the age of four with Emily Hall through Buffalo Suzuki Strings. She progressed quickly and played with the advanced touring ensemble by the age of 12. Her orchestra solo debut was with the Orchard Park Symphony in 2000, playing the Lalo Cello Concerto. In the fall of 2014, she performed Vivaldi’s Concerto for Two Cellos with the Fairfax Chamber Players, and in the spring of 2016, she performed the Elgar Cello Concerto with the Manassas Symphony Orchestra. (continue reading)


Mr. Jake Harpster

Jake Harpster
currently holds the position of Percussionist/Assistant Principal Timpanist for The United States Army Band “Pershing’s Own” in Washington, D.C.  

As a performer, Harpster is known for his diverse background. In the Broadway idiom, Harpster has presented concerts across the globe. He was the featured marimba soloist and percussionist of the Tony and Emmy award-winning production “BLAST.” With this show, he toured the United States, South Korea, and all forty seven prefectures in Japan. As a soloist and chamber musician, Harpster has won many awards and international competitions, and has presented concerts throughout the United States, Canada and Europe. (continue reading)


Mr. Kenneth Lee

Kenneth Lee
is TCSYO's woodwind sectional coach. He has had many advantages in his musical life. Mr. Lee started clarinet with a wonderful first teacher named John Placca who early in high school sent him to his clarinet teacher, David Weber. In his senior year, his high school baseball tournament conflicted with Mr. Weber's approach ("You have to decide if you're going to be a baseball player or a clarinet player!"), his father found Joseph Allard. Joe Allard asked Ken if it might not be easier for him to articulate if his tongue weren't tucked behind his bottomteeth. After leaving the US Army Band in Washington, Mr. Lee found Leon Russianoff, whose approach to him, as a student and clarinetist had an enormous influence on his teaching.
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Please Welcome!

Mr. Dave Detwiler


Dave Detwiler, TCSYO Brass Sectional Coach, began his career at a very early age as he studied trumpet with his father and piano with his mother, both local musicians. He graduated from The University of Pittsburgh where he studied with Charles Hois and Tony Pascarelli then travelled with The Donald Bird, Nathan Davis Big Band throughout Europe before returning to the US to join The United States Army Band to begin his 27 year career. Dave performed as principle soloist with The Army Concert Band and both Lead and Jazz trumpet with The US Army Blues. During his time in The Army, Dave also became one of the top call show players in Washington DC and the lead trumpet with The National Symphony Orchestra Pops at The JF Kennedy Center where he also performed with The Kennedy Center Opera House Orchestra playing any musicals and special events for more than 35 years.
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Mr. John Kaboff

John Kaboff, B.M., M.M., studied with Janos Starker at Indiana University as well as Jacqueline DuPre’s teacher, William Pleeth, at the Holland Music Sessions in the Netherlands and at the Britten-Peers Summer School in England. In addition to serving as Mr. Pleeth’s teaching assistant, he studied at the International Academy of Chamber Music in Kronberg, Germany, with Arto Noras. (continue reading)

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