Ottawa | University of Ottawa | London Symphony Orchestra | Philadelphia Orchestra | orchestra | Chicago Symphony Orchestra | Royal Philharmonic Orchestra | Cleveland Orchestra | San Francisco Symphony | London Philharmonic Orchestra | Boston Symphony Orchestra | BBC Symphony Orchestra | National Symphony Orchestra | Electric Light Orchestra | Ottawa Senators | National Symphony Orchestra (United States) | Melbourne Symphony Orchestra | Boston Pops Orchestra | Sydney Symphony Orchestra | Ottawa River | Royal Concertgebouw Orchestra | Minnesota Orchestra | Jerusalem Symphony Orchestra | Dallas Symphony Orchestra | Symphony Space | Toronto Symphony Orchestra | Cincinnati Symphony Orchestra | Yellow Magic Orchestra | Philharmonia Orchestra | Royal Scottish National Orchestra |
In January 2007, Marks performed the World Premiere of Steven Gellman's Viola Concerto with the Ottawa Symphony Orchestra to critical acclaim.