Please click on the administrator’s name to get more information about him or her.

Mark Robertson, Music Director


Mark Robertson, Music Director, is originally from Fort Wayne, Indiana. Both parents were musical (piano & voice) which led to Mark to picking up the violin at the early age of five. After graduating from Boston University and The Juilliard School, Mark moved to Los Angeles in 1995, shortly after giving his New York Recital Debut at Carnegie’s Weill Recital Hall. His violin teachers have included Dorothy DeLay, Kurt Sassmansshaus, Piotr Milewski, and Martin Chalifour. A ten-year alumnus of the Aspen Music Festival, Mark served as concertmaster of both the Philharmonia Orchestra and the Concert Orchestra under such esteemed conductors as James Conlon, Junichi Hirokami, and Murry Sidlin.

While in Los Angeles, Mark has been guest concertmaster for the Riverside County Philharmonic, the New West Symphony, the Pasadena Pops, and the Culver City Chamber Orchestra. He has also recorded for over 500 movie & television soundtracks, most prominently as concertmaster and solo violinist for the award-winning shows House of Cards and Penny Dreadful. He also served as concertmaster for the upcoming films Shock and Awe, The Gracefield Incident, and Skid Row Marathon, in addition to previous films including Baywatch, Contagion, Much Ado About Nothing, Ride Along 1 & 2, Premium Rush, Blackfish, Merchants of Doubt, and Horrible Bosses 1 & 2. He has conducted ensembles at the Aspen Music Festival, the Coachella Music Festival (Wu-Tang Clan), and for Access Hollywood (Carly Rae Jepsen)   On the pop music side of things, Mark has worked with Logic, A Great Big World & Christina Aguilera, Billy Childs, Daughtry, OneRepublic, the Fray, and Kelly Clarkson, among others. He recently served as concertmaster for Il Volo‘s performance at the Dolby Theater (Hollywood), and for Idina Menzel’s performance at the Hollywood Bowl.

Noah Gladstone, Music Director

Noah Gladstone, Music Director, is a multi faceted musician from Los Angeles. A trombonist at his core, he has performed professionally with the Chicago Symphony Orchestra, Los Angeles Philharmonic, Opera Santa Barbara, New West Symphony, The Hollywood Bowl Orchestra, Juilliard 415 as well as many other world class ensembles. In addition to his orchestral experience, he is a regular figure in the Hollywood studio music scene as a trombonist and a music contractor and has produced music for Showtime/CBS, Riot Games, Microsoft, Imagine Dragons, The Weinstein Company, Brand X Music, as well as other media for TV, film, recording artists, video games and advertising. He also manages the musical personnel of the West Los Angeles Symphony Orchestra, The San Bernardino Symphony and Opera Santa Barbara. He holds a Bachelors and Masters of Music degree from The University of Southern California.

Tim Davis, Director of Choral Activities


Tim Davis has been a force in the Nashville and Los Angeles vocal scenes since 1996. His work as a studio singer, vocal contractor, and vocal arranger has made its mark on hundred of multi-platinum records, network television shows, national commercials, and box office hits.

Tim’s unparalleled standard for excellence and ear for LA’s top vocal talent is seen most notably in his work as vocal contractor and arranger on Fox’s hit series GLEE.

Anthony Parnther, Cover Conductor

headshot-anthonyMaestro Anthony Parnther has conducted orchestras throughout the U.S. and internationally in virtually all mediums – Symphonic, Opera, Pops, Chamber, Ballet, Contemporary, and in Hollywood Studio sessions for motion pictures and video games.

His versatility has placed him onstage alongside luminaries in all genres including Frederica von Stade, Jessye Norman, Madonna, Hillary Hahn, the Canadian Brass, Doc Severensen, Jackie Evancho, Maynard Ferguson, Arturo Sandoval, Beyonce, Edgar Meyer, Jon Faddis, Limp Bizkit’s Wes Borland, Imagine Dragons, and Rihanna.

Anthony has also served as conductor for the most played video game on earth – League of Legends – which has presented sold out concerts at Staples Center in Los Angeles (live audience of 20,000) and the World Cup Stadium in Seoul, South Korea (live audience of 45,000). Each event garnered live streaming viewership of over 35 millions viewers.

Anthony is the Conductor and Music Director of the historic Southeast Symphony Orchestra in Los Angeles which is recognized as being the oldest predominantly African American symphony orchestra established in the US, as well as one of the most culturally diverse symphonic institutions in the world.

Since his appointment in 2011, Anthony has passionately advocated for and premiered new works by living composers of African descent including Emmy-winning John Wineglass, Gary Powell Nash, Marian Harrison, Renee Baker, Adolphus Hailstork, and bringing renewed attention to black female composers like Zenobia Powell Perry, Margaret Bonds and Florence Price.

Prior to the Southeast Symphony, Anthony served as Music Director and Conductor of the Orange County Symphony in Anaheim, California and the Inland Valley Symphony in Temecula, California. In 2008 he founded the critically acclaimed Orange County Wind Symphony which was invited to perform at Carnegie Hall. He established the popular “Symphony on Birch Street” summer series which generated unprecedented crowds of over 15,000 Orange County residents throughout the annual 3-day festival.

Niki Giermasinski, Director of Social Media

headshot-nikkiNiki Giermasinski is a flutist currently residing in New York City. She received her B.M from Berklee College of Music before joining INDMUSIC as a rights manager in the summer of 2015. During her ten-year career as a musician, Ms. Giermasinski has had multiple performances at Carnegie Hall, Jordan Hall, and Boston’s Symphony Hall both as a soloist and orchestral musician. In addition to performing, Ms. Giermasinski is an enthusiastic traveller with a keen appetite for Asian cuisines. Her recent travels have taken her to Sri Lanka, India, Indonesia, Thailand, Japan, the Seychelles islands, South Africa, and Oman. She is planning a move to Los Angeles in the near future. She can be contacted at ngiermasinski at

Alexandria Grace Williams, Director of Social Media

headshot-alexandriaAlexandria Grace Williamssocial media director, is a classically trained soprano and actress, residing in New York City.  She recently graduated from the Manhattan School of Music, earning her Bachelor of Music Degree in Vocal Performance.  She has also studied at the Stella Adler Studio of Acting and has sung as a soloist at St. Martin-in-the-Fields in London, the Cathedral of St. John the Divine in Manhattan; and has performed with the New York Philharmonic and at the Kennedy Center with the Manhattan School of Music’s Chamber Choir. Alexandria‘s recent credits include Bridgette in “Lizzie Borden: A New Musical”, and Susan in the Theatre Project’s “Plan Alternate Route”.  This past summer, Alexandria performed 9 classic musicals and operettas with the College Light Opera Company in Cape Cod, MA. She is represented by American Talent Management. She is very excited to be part of the HCO’s new family, maintaining their social media presence.

Music Advisory Board

Tree Adams
Tyler Bates
Mike Barry
Jeff Beal
Bruce Broughton
Kenji Bunch
Billy Childs
Scott Clausen
Elia Cmiral
Julia Gaskill
Mark Graham
Christopher Guardino
Tim Huling
Matt Hutchinson
Jason Johnson
Christopher Lennertz
Christian Linke
David Low
Deborah Lurie
Joey Newman
Anthony Parnther
Mike Patti
Alison Plante
Lucas Richman
James Sale
Jeffrey Schindler
Tim Simonec