Mailing Address: 9957 Moorings Drive, Suite 401 
Jacksonville FL 32257
Phone: 904-992-9101

Allen Henderson, Executive Director
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Allen Henderson holds degrees from Carson Newman College (BM), The University of Tennessee (MM) and the College-Conservatory of Music at the University of Cincinnati (DMA), where his minor was in Arts Administration and he was winner of the prestigious Corbett-Treigle Opera Competition.

Prior to his appointment as executive director in 2008, he served NATS as district and regional governor and was elected national secretary/treasurer from 2006-2008. He also served as interim executive director from 2007-2008. Henderson was a participant in the 1993 NATS Intern Program and later hosted the program in 1998. He was chair of the coordinating committee for the 2008 NATS 50th National Conference in Nashville, Tenn.

Henderson has held teaching positions at Oklahoma Baptist University, Austin Peay State University and Georgia Southern University. In these positions he has taught voice, foreign language diction, opera, choral techniques, choral literature, song literature and directed choirs. He also served as music department chair at Austin Peay and Georgia Southern.

As baritone soloist, Dr. Henderson has appeared in concert, opera, and oratorio across the country. A district winner and regional finalist in the Metropolitan Opera auditions, Dr. Henderson was winner of the 1995 National Federation of Music Clubs Artist Awards. He also was a regional finalist in the NATSAA competition.

Deborah Guess, Director of Operations
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Deborah Guess is director of operations in the NATS Executive Office, joining NATS in 1997. Before being appointed director of operations in 2006, she served as office manager for the Association and assisted the executive director. As director of operations, Guess is responsible for operations of the executive office, marketing and promotions for Association events, planning/coordinating national conferences and is managing editor of the Inter Nos newsletter.

Guess has more than 30 years experience in event and business management, as well as accounting. Before joining NATS, she held the position of public relations director at the Museum of Contemporary Art in Jacksonville, Fla. and before that served as assistant to the director of the Technology Resource Center at Santa Fe Community College in Gainesville, Fla., assisting with grant writing, promotions of events and computer training for other staff members. She also served as a teaching assistant at the University of North Florida and did several research internships at the Cummer Art Museum (in Jacksonville) and the St. Augustine Historical Society in St. Augustine, Florida.

Guess is a Magna Cum Laude graduate and holds a bachelor of arts degree from the University of North Florida in Jacksonville. She is also a lifetime member of The Honor Society of Phi Kappa Phi and Phi Theta Kappa. Guess holds an Associate of Arts degree in accounting and certification in Volunteer Management, Internal Revenue Income Tax Law, Business Management and Graphic Design. She has served on the Board of Trustees of the United Methodist Church and several local charitable organizations.

Tom Strother, Marketing and Communications Administrator
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Tom Strother is the marketing and communications administrator for the National Association of Teachers of Singing. He joined the NATS staff in September 2012.

Prior to joining the NATS team, Strother worked nearly five years as director of communications for Second Harvest North Florida, the Jacksonville-area Feeding America food bank. He also served simultaneously in the same role for Second Harvest's parent organization, Lutheran Social Services of Northeast Florida, Inc. While with Second Harvest and LSS, Strother provided oversight to marketing, branding, media relations, publications, web development and social media for both organizations.

Before beginning work in the Jacksonville nonprofit sector, Strother spent 10 years as an athletics administrator, serving as assistant athletics director for media relations at the University of North Florida from 2004-2008, as director of athletics media relations at Troy University from 1999-2004 and as sports information director at Auburn University at Montgomery for a year beginning in 1998.

A 1994 graduate of Auburn University with bachelor's degree in journalism, Strother also worked in the newspaper industry as a reporter and editor from 1994-98 for the Boone Newspaper Group and the Montgomery (Ala.) Advertiser. While at Auburn, Strother was a four-year member of the Auburn University marching band.

Strother is an active member of the North Florida Chapter of the Public Relations Society of America and secretary of the board of directors for America World Adoption in Florida. He and his wife, Kristy, have four children and reside in Jacksonville.

Susan Grizzard, Membership Services Coordinator
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Susan Grizzard is the membership services coordinator for the National Association of Teachers of Singing. Susan joined the staff at the NATS Executive Office in 2001. She was previously employed in the accounting departments of major corporations such as Maidenform and Crowley Maritime Transport. Her responsibilities in membership services include the processing of new memberships, dues renewal payments for all NATS members and maintenance of the membership and subscriber database. Susan is also in charge of all non-member subscriptions to Journal of Singing. The North Carolina native currently resides in the nation's oldest city, St. Augustine, Fla., with her husband and son.

Elizabeth Zettler, Program Administrator
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Elizabeth Zettler joined the National Association of Teachers of Singing Executive Office in May 2012. As the program administrator she is responsible for the administration of all NATS competitions and training programs. She also assists with administration of registration for conference and workshop events, manages advertising for the Journal of Singing, assists in maintaining areas of the national website and coordinates other NATS advertising sales.

Both her performing experience and years as a professional voice teacher give her a unique perspective in her position with NATS. Zettler also has a background in sales and was the owner of The Paisley Pup, an online store specializing in all natural and organic dog treats. She also has experience in arts management, event management, marketing and business administration.

Elizabeth received her MBA from Georgia Southern University, as well as earning both her master's and bachelor's degrees in music from Georgia Southern University, each with an emphasis in vocal performance.

Kimberly Ehrhardt, Bookkeeper/Executive Assistant
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Kimberly Ehrhardt joined the NATS team as the bookkeeper/executive assistant in January 2012. Her responsibilities include assisting with all financial areas, as well as day-to-day office administrative functions. She will also work with the team on coordinating workshops and conferences. A New Jersey native, she is a graduate of Rutgers University with a bachelor's degree in business. She has more than 20 years of experience working in the financial field, as well as experience with event planning and fundraising. Ehrhardt has worked with various choirs and has always had a passion for music. She relocated to Jacksonville in 2012, where she resides with her husband.

Mandy Ruddock, Special Events Assistant

Mandy Ruddock joined the NATS office as a part-time clerical assistant in 2002, working wherever extra help was needed during the busy season. Ruddock currently serves as the special events assistant and helps with planning/coordinating national conferences and Board meetings. She is experienced in retail management and event planning. Mandy a native of Florida, is married and enjoys going to NASCAR races.