The Caltech Orchestra, under the direction of Music Director Allen Robert Gross,is a full seventy-piece symphony orchestra comprised of undergraduate and graduate students, faculty, and staff at Caltech. The orchestra rehearses once per week and gives four concerts annually on the Caltech campus at Ramo Auditorium. Recent concert programs have included symphonies by Mahler, Brahms, and Beethoven, as well as the contemporary compositions. The Caltech Orchestra has collaborated with such artists as Martin Chalifour, Danielle Belen, Steven Vanhauwaert, Samuel Fischer, and Lawrence Sonderling.

  • music director


    Allen Robert Gross,
    The Caltech Orchestra Music Director and Conductor


  • orchestra members


    • audition information 

      305 S. Hill Avenue

      Saturday, September 23, 2017
      4 :00 pm to 6:00 pm and
      7 :00 pm to 10:00 pm

      Sunday, September 24, 2017
      7:00 pm to 10:00 pm

      Sign-up sheets will be posted in the Music House during the week prior to auditions.

      Auditions are friendly and low stress. If you have a very short (2-3 minute) prepared piece that represents the level of your playing, bring it, but don't hesitate to audition if you do not have anything prepared. If you haven’t played your instrument in some time, please come and audition anyway. There may also be some sight reading.

      If you have questions, please contact Allen Gross at

      For more information about auditions, please contact Cindy de Mesa via email.

  • rehearsal schedule
    A PDF version of the 2017-2018 orchestra rehearsal schedule will be available online soon. 

    concerto competition

    The Caltech Orchestra sponsors an annual concerto competition to give exceptionally accomplished soloists the opportunity to perform with the orchestra. 

    For more information about the concerto competition, please contact the COSO music director via email.