Artistic Team


Mary Cunningham, Artistic Director

Now in her fourteenth year as Artistic Director of the Halalisa Singers, Mary leads the ensemble in reaching out to wider audiences and performing an ever-widening repertoire.

Following her vision to share their music across the Boston area, Halalisa has now performed for audiences in the communities of Acton, Arlington, Bedford, Boston, Cambridge, Concord, Hanover, Hingham, Harvard, Littleton, Melrose, Roxbury, Wellesley, & Winchester. With their special sound and mission, the Halalisa Singers have been sought after to perform at Multicultural and Diversity events, Benefit concerts and International festivals in the Northeast and Europe. Ms. Cunningham earned her Masters in Music at the Cleveland Institute of Music after degree training at the Mozarteum in Salzburg, Austria. She is well known in the Boston area as an active conductor, vocalist, and flute soloist. She is the Choir Director at the Unitarian Universalist Church of Reading, is a member of the American Choral Directors Association and the UU Musicians Network. A frequent performer with the Christmas Revels, Mary is on the faculty of the Powers Music School in Belmont, and has a private teaching studio in her Lexington home.


Trevor Berens, Accompanist

As a pianist, Trevor plays in many different styles, specializing in avant-garde classical music, traditional classical music, and free improvisation.

Trevor holds degrees from Loyola Marymount University (BA: Music—Piano, Composition and Psychology), California Institute of the Arts (MFA: Performer/Composer), and Lesley University (MA: Expressive Therapies with Music Therapy specialty). As a collaborator, he enjoys working with solo vocalists and instrumentalists, chamber groups, choruses, and with dancers and actors. Trevor is the founder, pianist, and resident composer of the newly formed nine member new music ensemble, Sonic Liberation Players. He is a licensed music therapist who currently works with the elderly, young children, and as a supervisor with master’s level interns. With his wife, Jessica, he runs the Berens Voice and Piano Studio out of Lincoln, MA. 


Bertram Lehmann, Percussionist

With a supple and fluid style of drumming, Bertram has become a sought-after player in the region and beyond, performing Jazz, Latin and World music.

Bertram has performed at Jazz at Lincoln Center, Symphony Space, Columbia University, Brooklyn Academy of Music, the Jazz Gallery in New York City, Boston Symphony Hall, the Boston Globe Jazz Festival, Scullers, the Regattabar, MIT, the Museum of Fine Arts in Boston, and has appeared on over 65 public television stations nationwide. He is an Assistant Professor in the Percussion and Ear Training departments at Berklee College of Music, and also teaches at Phillips Academy in Andover