Staff
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Director of Instrumental Music
Performing Arts Department Chair

Gary Coartney:

  • Graduated from Chandler High School (AZ) May 1987

  • Attended Diablo Valley College Focus in Music (Jazz Studies) 1988-2008. AA Degree 1997

  • Attended CSU Hayward (East Bay) Major in Music Theory & Composition. BA 1999

  • Attended CSU Hayward (East Bay) Major in Music Theory & Composition. MA 2005

  • Attended CSU Hayward (East Bay) Single Subject Credential in Music. 2003

  • Private Music (Trumpet) Teacher for 22 years in Bay Area and Phoenix Area.

  • Performed throughout the Bay Area in most music genres.

  • Recorded 5 CD’s with both Diablo Valley College Night Jazz Band and the Cal State Hayward Jazz Ensemble.

  • Written over 100 compositions for almost every musical setting.

  • Teacher in Fremont Unified School District Elementary 2001-02

  • Teacher in Mount Diablo Unified School District Elementary & High School 2002-Present

  • 3 years of Elementary Instrumental & Vocal Teaching At Ayers, Sequoia, Meadow Homes and Westwood Elementary. 2002-2005

  • 2 years as Marching Band Instructor at Northgate High School 2003-2005

  • Currently Director of Instrumental Music at Concord High School 2005-Present

  • Member of California Music Educators Association (CMEA)

  • Member of the California Teachers Association (CTA)

  • Member of Northern California Band Association (NCBA)

  • Member of the American Society of Composers and Publishers (ASCAP)

  • Member of the Mount Diablo Music Education Foundation (MDMEF)
  • Auxiliaries/Winter Guard

    Andrea Riley-Sorem:

  • Alumni of the Concord High School Music Program and Auxiliaries. Grad 91

  • Attended Santa Clara University Major Elementary Education and Minor in Dance. Grad 95

  • USA (United Spirit Association) 2000-01

  • Started Winter Guard program in 1999

  • Currently a 5th Grade Teacher at the Pittsburg Unified School District.

  • Trained at Contra Costa Ballet Center 1980-87

  • Dance team at SCU 1992-93

  • Central Junior High School Cheer Coach from 2000-2004

  • CHS Auxiliary Coordinator since 1993
  • Alexandra Riley-Sorem:

  • Alumni of the Concord High School Music Program and Auxiliaries. Grad 99

  • Member of the very 1st Winter Guard Team at Concord High School 1999

  • Attended Santa Clara University Major English Minor Communications Grad 2003

  • CHS Auxiliary and Winter Guard Instructor since 2001

  • Current Employed with Seneca Center Facility in San Francisco General Hospital with Disadvantaged Youth.

  • Trained at Contra Costa Ballet Center
  • Annie Petersen:

  • Alumni of Concord High School Music Program and Auxiliaries. Grad 2001

  • Studied Music at LMC

  • Northgate Auxiliary Coordinator from 2002-2007

  • Currently Orthodontic Assistant

  • CHS Auxiliary Instructor since 2007
  • Alison Curtis:

  • Alumni of Concord High School Music Program and Auxiliaries. Grad 2007

  • Currently Attending BYU Idaho Majoring in Health Science Minor in Dance.

  • CHS Auxiliary Instructor since 2008
  • Percussion

    Rod Stoltz:

  • Alumni of Clovis West High School Music Program. Grad 1988

  • Member of the Blue Devils “B” (Percussion) 1988

  • Member of Blue Devils “A” (Percussion) 1991

  • Drummer in the Needleman blues & rock band.

  • Instructor (Percussion) at Clovis High School 1989-1990

  • Instructor (Percussion) at Beyer High School 1993-1994

  • Instructor (Percussion) Blue Devils “C” 2007-Present

  • CHS Percussion Line & Winter Percussion Coordinator since 2007
  • Gary Caldwell:

  • Member of the Blue Devils (Percussion) from 1970-1976. World Championship 1976

  • Instructor of the Blue Devils “C” corps (Percussion) since 2007

  • Currently employed as a Senior Systems Analyst for Verizon Wireless.

  • CHS Percussion Instructor since 2008
  • Chriss Robinson:

  • Alumni Colligate Vocational Institute Music Program. Grad 1984

  • Attended University of Las Vegas Majoring in Music Performance (Percussion) 1988-89

  • Member of the Concord Blue Devils (Percussion Line) 1984-87. World Champions 1986

  • Instructor of Blue Devils “B” Percussion Caption Head 1991-1992

  • Instructor Lodi High School Percussion. 2008-Present.

  • CHS Percussion Instructor since 2009
  • Hoyt Weller:

  • Alumni of the Clayton Valley High School Music Program. Grad 1974

  • Attended Cal Poly, San Luis Obispo Majoring in Business Admin/ Secondary Focus in Music Performance (Percussion). Grad 1982 B.A.

  • Since College Hoyt has been involved in numerous performances and productions throughout the Bay Area from musicals, church groups, etc.

  • CHS Percussion Instructor since 2007
  • Julia Howe:

  • Alumni of the Concord High School Music Program. Grad 2009

  • Member of the Concord Blue Devils “B” (Percussion Pit) 2009. World Champions 2009

  • Attending Diablo Valley College.

  • CHS Percussion Instructor since 2009
  • Brass

    Mike Snow:

  • Alumni of the Concord High School Music Program. Grad 2009

  • Attending Diablo Valley College Majoring in Music

  • CHS Brass Instructor since 2009
  • Woodwinds

    Zach Lambson:

  • Alumni of the Concord High School Music Program. Grad 2009

  • Attending BYU Idaho, Majoring in Music Education.

  • CHS Woodwind Instructor since 2009
  • Marching & Visuals

    Sarah Burgstahler:

  • Alumni of the Concord High School Music Program. Grad 2007

  • Attending Los Medanos College Majoring in Music Performance

  • CHS Drum Major Instructor since 2007

  • CHS Marching Instructor since 2009
  • Brad Fujizawa:

  • Alumni of the Concord High School Music Program. Grad 2006

  • Attending Diablo Valley College Majoring in Music Performance

  • CHS Marching & Visual Instructor since 2007
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