About Us

our board of directors

Bill McAdoo, President

Bill comes to the organization with various and meaningful skills to lead the organization.  As an insurance professional for 35 years, Bill brings organizational and time management skills.  He has also served in multiple leadership positions; President of Church congregational council at the Lutheran Church of the Good Shepherd in Coatesville, PA (for multiple terms), board member and treasurer of the Bear Creek Camp in Bear Creek, PA, managing a budget of $750,000, and president of Chester County Life Underwriters.  Bill and his wife, Jo, live in Glenmoore, PA.


Theresa Moss Witmyer, Vice President of Artistic Development

Theresa Moss Witmyer headshotTerri has been a member of Concordia since the spring of 2013. She has sung with Concordia Voices, Masterworks, Chamber Choir and Ariana Women’s Choir, and has appeared as a guest instrumentalist on accordion!  She is currently serving her first term as Vice President of Artistic Development. Terri studied for her Bachelor of Music in Piano Performance at West Chester University.  She has been teaching piano lessons in the Chester County area since 2001 and enjoys teaching students of every age.  She earned her Master of Divinity degree from Palmer Theological Seminary and in 2014 was ordained at Cornerstone Christian Fellowship in West Chester.  She currently ministers there as a member of the Elder team and as an ordained reverend. Terri was recently married to Ben, and has lately been enjoying the adventure of their first year of marriage.  She enjoys reading, playing the piano and baking, and especially playing table-top games with friends. Terri volunteers as a worship leader at Cornerstone Christian Fellowship’s various ministry meetings on a regular basis.


Peter Clarke, Vice President of Business Development

Peter Clarke HeadshotJoining in the Fall of 2013, Peter sings Tenor in both Concordia Voices and Orpheus Men’s Choir.  He has also kept himself busy by participating in most of CCA’s outreach performances.  Peter previously served as our Treasurer for 4 years. Peter earned a Bachelor Degree in Architectural Engineering from Penn State and is continuing his studies there as a Graduate Assistant pursuing a Master’s Degree in Architectural Engineering.  He currently works for Precis Engineering as a Mechanical Engineer designing heating, ventilating, air conditioning, and control systems for buildings.  His background in engineering and his love of spreadsheets has earned Peter the unofficial title of “The Number Wrangler”. Peter enjoys brewing beer, cooking, engaging in various nerdy hobbies, and general merriment.  He likes picking apples in the Fall, is the youngest child, and his favorite dog is hot and covered in chili.


AJ Clarke, Treasurer

AJ is a Tenor in Concordia Choral Arts and serves as Treasurer for the group. He is retired from a career in the Pharmaceutical industry where he lead groups in Research and Development.

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Holly Branham, Secretary