MCCO Artistic Staff

Louise Gerdelmann

Associate Artistic Director and Conductor

Louise Gerdelmann served as Minister of Music at Gwynedd Square Presbyterian Church, where she conducted a 30-voice adult choir, two children’s choirs, an Orff ensemble, high school ensemble, and an inter-generational concert band. She provided organ music for all services. Louise taught elementary vocal music in North Penn, Pennridge, and Methacton School Districts.

Recently, Louise served as a member of the music staff at Doylestown Presbyterian Church. During her time at Doylestown she conducted the Alleluia Choir, assisted in the direction of the yearly children’s musical, served on faculty for the Summer Music and Arts Camp, and assisted in the planning of the Lessons and Carols Service and Spring concerts.


A graduate of West Chester University, she pursued graduate work at the University of the Arts and Westminster Choir College. During her career, she was named a semi-finalist in the State Teacher of the Year Award program and received a Citation of Excellence Award from the PA State Senate upon her retirement from Methacton.


Currently she teaches private piano and is a substitute organist in many area churches. Louise is a member of the board of directors for Lansdale Community Concerts and serves as their Campaign/Membership Chair. 

Gabriel Rebolla

Collaborative Pianist

Originally from Campinas (Brazil), Gabriel Rebolla has a career as a soloist, piano professor, collaborative pianist and Opera Coach performing in many concert halls throughout Brazil, Italy and United States.

Gabriel is on the faculty of Temple University's voice and Opera department, music director and organist of St Peter`s Lutheran Church in Chester Springs and piano professor at Philly Music Lessons.

Mr. Rebolla has played with important conductors such as Karl Martin, Ted Murray, Paul Rardin, Lance Inouye, Peter Marshall, Carlos Fiorini, Vasti Atique, Hermes Coelho and Eduardo Ostergreen.

As an opera coach Mr Rebolla worked for some important opera companies and educational programs such as “La Musica Lirica” (Italy), Fio Américas (Brazil/Italy), Russian Opera Workshop at Academy of Vocal Arts (AVA- Philadelphia) “La Boheme” (New Jersey), “Libera Opera” (Philadelphia), “Fringe Opera festival” (Philadelphia), Abal _ Association of Lyrics Artists (Brazil) and Delaware Valley Opera Company.

Mr. Rebolla also worked as an accompanist of several choruses. Some of them are Canarinhos da Terra (Brazil), Philadelphia Gay Men Chorus, Lucent Technology Choir (Brazil), Temple University Chorale and Thomas Jefferson University Choir.

As a soloist pianist, Mr Rebolla has received some national and international awards such as the Stegner Scholarship for best pianist at Georgia State University in 2008-2009, and Cadenza Piano Competition in Bauru in 2004 where he also received an award for best interpretation of Brazilian music.

Michael Kemp

Michael’s inherited musical legacy from parents, John and Helen Kemp, took him on a path of voice and viola performance, conducting, and composing and writing. In addition to institutional education at Oklahoma University, Westminster Choir College, and the Royal Conservatory of Music in The Hague, Holland, Michael also studied privately with renowned choral authorities Paul Salamunovich, Philip Brunelle, and Alice Parker, with extensive summer study with Robert Shaw.


Prior to fourteen years of teaching Upper School music at Germantown Academy, PA, Michael served as Director of Music Ministries of Abington Presbyterian Church in Abington, PA, after holding other significant church music positions in Nashville, TN and Arlington, TX. While in Texas, he also founded and conducted the Arlington Choral Society, which critics placed “on the top rung of choral music in the Dallas Metroplex.” During that time he was a choral and church music lecturer at SMU’s Perkins School of Theology.


Recognized for his exceptional ability to build programs, Michael founded and built from ground level many successful ensembles, including four church youth choirs and two high school choirs, two adult community choruses, and one adult community symphony orchestra, in addition to expanding and enhancing existing ensembles. Michael trained choral conductors throughout Jamaica, and his choirs toured internationally to the U.K., Austria, and Poland.


After Michael was diagnosed with ALS in 2019, he retired from conducting the two adult ensembles that he founded, the Academy Chorale and Orchestra (now known as the Montgomery County Chorale and Orchestra), as well as his position as music director at Trinity Presbyterian Church in Berwyn, PA. The last two years of his life was spent composing choral works, writing more books, and finishing his memoirs. Michael passed away in July 2021.