Andrew Brock


Andrew Brock is a finance & technology executive in Dallas. He currently serves as EVP & CIO of Associa, the nation’s largest residential property management firm, and is CEO of its Digital Services division. A native of East Tennessee, Andrew grew up immersed in the music of Appalachia and began playing piano at an early age. Through both middle and high school, he attended a conservatory of music affiliated with the University of Tennessee, on a piano performance scholarship.

While he ultimately chose a career in business, Andrew’s love for music has continued to play a significant role in his life. As his career moved him around the U.S., he has served as a worship leader for churches in Tennessee, Seattle, Chicago, and Texas.

Andrew received his Bachelor of Science in Finance from the University of Tennessee and his MBA in Marketing from DePaul University. He was recently named the 2019 Dallas CIO of the Year by the Dallas Business Journal.

He enjoys fly-fishing, hiking, hunting with his hound dog, and is an avid fitness enthusiast.

Joseph Lo

Vice President

Joseph Lo, a native of Pennsylvania, has lived in the Dallas/Fort Worth area since 2000. With his parents’ passion for classical music, Joseph developed an appreciation for music at an early age. His transition from passive listener to active performer started with piano lessons at the age of 6. In grade school, he sang in the choir and participated in school plays. A love affair with synthesizers and drums during high school eventually led to an 8 year stint with one of south Louisiana’s top cover bands. Since then, Joseph has participated in several church and community choirs and is currently a tenor at the Cathedral Guadalupe.

Although he considered a career in sound engineering, practicality led to the pursuit of an Electrical Engineering degree from Louisiana State University (Geaux Tigers!). Joseph is currently Sr. Manager of Business Intelligence and Data Warehousing at First American Corporation. He also freelances in audio and video production with his company, Three Media. Some of his projects include Dodge RAM (Texas State Fair Promotion) and the NCAA Final Four 2014.

Elizabeth Garcia


Elizabeth Garcia is a South Texas native who has lived in the Dallas area since 2008. She is in video-products marketing for AT&T and holds a bachelor’s degree from the University of Texas at Austin and an MBA from UTSA. Music has always been an integral part of her life, singing in various churches, schools, and community choirs. She was privileged to sing with the Corpus Christi Cathedral Pontifical Chorale at a papal audience for St. Pope John Paul II (1997), and with the San Antonio Mastersingers at both Carnegie Hall (2008) and in the Cavalleria Rusticana chorus for Andrea Bocelli (2008).

Elizabeth has previously served on the board of the Student Union at the University of Texas at Austin, Women of AT&T – San Antonio Chapter, St. Rita Fine Arts in Dallas, and currently sits on the parish council for Cathedral Guadalupe.

Patrick J. Gnage


Patrick J. Gnage studied voice at the Eastman School of Music and holds two degrees in Voice Performance and Literature. Mr. Gnage has been featured as soloist in all of the major oratorios of J.S. Bach, as well as the oratorios and choral works of Handel, Monteverdi, Carissimi, Mozart, Vaughan Williams, and Duruflé, performing with such ensembles as The Publick Musick, Orchestra of New Spain, Rochester (New York) Bach Festival Chorus, Concert Royal and the Dallas Bach Society. Recently noted for “a deep and resonant bass voice” (Christ, Membra Jesu Nostri by Schutz) and a “rich and full” tenor (Sancho Panza, Don Quichotte auf der Hochzeitdes Camacho by Telemann), Patrick’s flexibility yields him to perform a wide variety of Early Music roles. Other favorite parts portrayed with the Dallas Bach Society include La Discorde in M.A. Charpernier’s Les Arts Florissants and Testo in Monterverdi’s Combatimento di Tancredi e Clorinda. Patrick’s first performance of the bass arias in Bach’s St. John Passion was with the Rochester Bach Festival Chorus & The Publick Musick, the live recording of which was released by Sonabilis.

William Norcross

William Norcross is an Emergency Physician in the Emergency Department at Parkland Memorial Hospital for the University of Texas Southwestern Medical School. Born in Denton, Texas, William has Bachelor and Masters degrees in Mathematics from the University of Texas at Arlington and an MD from the University of Texas Health Science Center at San Antonio. His wife Glenda Norcross is a ballet dancer/teacher and a member of the New York Baroque Dance Company. They have no children and far too many cats; he is open to a trade.

Leonard Hayes

Pianist Leonard Hayes is the prize winner of numerous piano competitions including first prize in the 2015 National Piano Competition sponsored by the National Association of Negro Musicians. As recitalist and chamber musician, Mr. Hayes has performed across the U.S. and abroad. Mr. Hayes received a High School Diploma from the Interlochen Arts Academy. He holds a Bachelor of Music Degree from Lawrence University and a Master of Music from the Eastman School of Music. Currently, Mr. Hayes is pursuing a Doctor of Musical Arts (D.M.A.) at the Flora L. Thornton School of Music within the University of Southern California.

James Dixson

A native of Southeast Oklahoma, from an early age James Dixson loved classical music, including opera.  As a teenager, James' Walter MItty dream was to be an symphony/opera conductor.  He entered the University of Oklahoma on a music scholarship but quickly recognized that this was not a career path that was realistic for him. He entered medicine and had a fantastic career as an internist and physician leader in a large health care organization. Even though not a performer, his love for music has never abated, and he has been a faithful participant and contributor to the arts.  Prior to moving from Oklahoma City to Dallas about four years ago, he served for several years on the Board of the Oklahoma City Philharmonic.

Scott N. Davidson

Dr. Scott Davidson is a Dallas dentist who is native to the area.  He received his Doctor of Dental Surgery from Baylor College of Dentistry.

Dr. Davidson has had a lifelong interest in music and performing. While in dental school he was a singer at Six Flags Southern Palace, and later at the Gran’ Crystal Palace Dinner Theater.  Following graduation, he worked as a singer aboard the Royal Odyssey cruise ship before starting his dental practice.

Dr. Davidson has continued his avocation in music, singing with Dallas Bach Society in the 2019 Handel's Messiah, and also with the Christ the King Singers professional choir.  He is a frequent singer at wedding/funerals/events in the area.  He and his two brothers sing together as The Davidson Brothers, and they have made three CD recordings of sacred music. He also serves on the board of Dallas Summer Musicals and Preston Center Rotary Club.

Arend Julius Koch

Arend Julius Koch moved to Dallas in 1965.  His objective was to learn more about the cotton business, in which his family had been involved since 1868.  Here he became active in many business and cultural organizations.  He served on the boards of the German Day Council, the German American Chamber of Commerce in Atlanta, and was President of the German American Chamber of Commerce, North Texas Chapter.  Arend was Board member of the Wagner Society of Dallas, and for 10 years he served as President and is the Honorary President of the Dallas Goethe Center.  Since 1991 he serves on the board of the Dallas Chamber Music Society of which in 1998, he became First Vice President, and then served 3 consecutive terms as President.  He was elected  President Voices of Change, and in May 2006 was voted to the Executive Board of the Dallas Bach Society and in 2007 was elected 2 terms as its president.

Arend also is a member of the American Council on Germany in New York and is actively involved in its Texas Warburg Chapter. In 1990, the German government awarded him the Federal Republic of Germany Friendship Award.

Arend is married and has two children.

Luis Lafer-Sousa

Luis Lafer-Sousa is passionate about technology and entrepreneurship. As the President of TownSq US, he has helped grow the startup from its first user in North America to the now millions on the platform today. While never blessed with musical talent (outside a short stint as a bassist in a high-school garage band), he was blown away by his first Dallas Bach Society performance and is humbled to serve alongside the rest of the Board.

A graduate in Mathematics with Computer Science from MIT, Luis enjoys volunteering with his alumni association, including admissions interviews, sponsoring internships, and attending local DFW STEM events. He also serves as Communications Director for the Old Lake Highlands Neighborhood Association. Finally, he is an active participant in the Dallas Startup Ecosystem, attending many events and working with local startups in their early stages.

Larry McCain

Larry serves as organist of Northaven United Methodist Church in Dallas. Larry joined DBS and the Board in the early 1990’s shortly before James Richman came as Artistic Director.

Larry McCain is a native of Tyler, Texas, and grew up in Arlington, Texas.  He is an accomplished pianist and is an adjunct piano instructor at Brookhaven College where he also accompanies the Brookhaven Choral Society. Larry serves as Secretary of the Dallas Chapter of American Guild of Organists, and has served as Board President of the Dallas Bach Society.  He is a Sales Consultant for Church Organ Associates, representing Allen Organs. 

Larry received his Bachelor of Music from Texas Christian University, his Master of Music from Midwestern University, and has done post-graduate study.  His compositions are published by Alfred Music Publishing and Myklas Music Press.  Larry has served as organist and director of music for many churches, most recently serving 26 years at Central Lutheran Church of Dallas.Larry, his wife Diane and their cat J.T. live in the Lakewood area. 

Sonya Merrill

A native of the Berkshires, Sonya Merrill, MD, PhD, often attended concerts at the Shed at Tanglewood as a young child. This early exposure to classical music prompted her to start violin lessons at age three. After moving to Dallas, Sonya continued her studies with Melvin Baer of the Dallas Symphony Orchestra and later joined the Greater Dallas Youth Orchestra. She returned to her home state of Massachusetts to attend Wellesley College where she majored in philosophy and continued her musical interests. She also was fortunate to be able to play with a number of college orchestras while studying philosophy for five years in England, first as an undergraduate at the University of Cambridge and later as an MA and PhD student at the University of London.

However, her professional path ultimately led not to musical performance or to an academic career in philosophy but rather to medicine. She graduated from Harvard Medical School and completed residency training in Dallas in internal medicine followed by a fellowship in sleep medicine. She started her private practice, Dallas Sleep Medicine Specialists, in 2007. She served for twelve years as the associate program director of the internal medicine residency program at Texas Health Presbyterian Hospital Dallas where she enjoyed mentoring young physicians." She is an avid traveler and is particularly drawn to India and Southeast Asia.

Robert Preece

Rev. Dr. Robert Preece is Senior Pastor of Zion Lutheran Church and School of Dallas.  He was born and raised in Austin and came to Zion in 1990, having served previously for 17 years at Immanuel Lutheran Church of Waterloo, Illinois (metro St. Louis).  A 1973 graduate of Concordia Seminary, St. Louis, he earned a Doctor of Ministry degree in 1981 from Drew University, Madison, New Jersey.

Pastor and his wife Linda, she with roots in San Antonio and Austin, have two married sons, Justin and Matthew, and three grandsons. Linda is a retired fundraiser, having served Southern Methodist University for 22 years.  She had a professional soprano career in St. Louis as co-Principal of the American Kantorei under the direction of The Rev. Robert W Bergt.  Pastor Preece also sang in the American Kantorei and keeps his copy of J. S. Bach – 371 Four-Part Chorales, Edition Breitkopf, on the home piano and plays regularly for pastoral inspiration, rest, and peace.

Rosalind de Rolon

While a journalism graduate student, Rosalind de Rolon managed marketing public relations for the University of Missouri’s system-wide concert series featuring artists such as the Guarneri Quartet, Beaux Arts Trio, Itzhak Perlman, Vladimir Ashkenazy, Isaac Stern and London Symphony.

She then directed marketing public relations and publications at the Modern in Fort Worth, substantially growing membership and media coverage and conducting the American Museum Association’s national professional-development programs for PR practitioners.

Recruited by Canada as a diplomatic officer, Rosalind opened U.S. cultural markets, ran Canadian performing arts tours from Canada to Mexico and managed academic, cultural and media programs. She later consulted for U.S. nonprofits in the areas of marketing public relations, strategic planning and fundraising.

Author of The Feminine Face of God in Christianity and The Earth as a Sacred Realm, Rosalind has lectured widely on Primordial Wisdom, the forgotten common vision of the world’s religions.  A native Californian, she holds degrees from the University of California, Berkeley, the Sorbonne and the Graduate School of Journalism at the University of Missouri.

Wolfgang Schmidt-Nowara

Wolfgang Schmidt-Nowara MD is a Board-certified specialist in pulmonary and sleep medicine. He has worked at university, the VA and in private practice in Albuquerque, Dallas and Santa Fe, and he is now retired from practice. His affiliation with the Dallas Bach Society began in 1997 and continues through the present with enthusiasm. Highlights have been Board leadership by his wife, Ellen Marder, concerts at their Dallas residence and attendance at most events, continuing after the move to Santa Fe.

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