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Conductors & Coaches

Lawrence C. Markiewicz>>

Mary Barto>>
Woodwinds Coach

Anthony Morris>>
Lower Strings Coach

Marc Szammer>>
Upper Strings Teaching Artist

Kristen Drymala>>
Cello coach

Paul Brandenburg>>
Brass Coach

Megan Delatour>>
Viola coach


Thursdays, 4:45- 6:45 p.m.
Congregation Ramath Orah, 550 West 110 Street


Registration $75
Tuition $1,445
Program and Concert Fee $500

Financial Aid


Concert Orchestra

Concert Orchestra at JALC. Photo: Adam Hume

The ISO Concert Orchestra is a youth orchestra for musicians with advanced-intermediate level technical and sight-reading skills. Lead by Lawrence C. Markiewicz, the ensemble performs annually in halls like Symphony Space, Lincoln Center and throughout New York City.  This orchestra is perfect for the developing player who is ready to take on more challenging repertoire. An annual concerto competition is held each winter for members of the Concert Orchestra. The winners perform at Concert Orchestra’s final concert of the year.

An audition is required for membership, as are registration and tuition fees.

Photo & Video Release Form: CLICK HERE


Hear them perform:

G. Verdi, Overture from Nabucco
Eric Dudley, Conductor

G. Bizet, “Intermezzo” from Carmen
Lawrence Markiewicz, conductor