Management Team

We are privileged to be part of the ministry of Bethesda.

Management Team

Each member of the management team supports our core values and serves our customers, patients and one another with enthusiasm.

John English, MD

John English, MD

Chief Executive Officer

Dr. John English is board certified by the American Board of Family Medicine and has been practicing medicine since 1993. Prior to becoming the Medical Director of Bethesda Health Clinic, he practiced medicine at Trinity Clinic in Tyler, Texas. John holds a M.D. degree from U.T. Southwestern Medical School. He completed his residency at John Peter Smith Hospital.

Diane Thomason

Diane Thomason

Chief Development Officer

Diane Thomason is Bethesda’s Development Director, and she handles all donor relations and fundraising events. Diane served on the very first board of directors for Bethesda in 2002, and joined the organization officially in 2009. Diane studied Fine Arts at the University of Texas at Austin, and has a background in technology. She has served in leadership positions with many local organizations, including UT Tyler’s College of Business & Technology, Tyler Executive Women’s Network (TEWN), Christian Women’s Job Corps, The Women’s Fund and GetIT. 

Melissa Briscoe

Melissa Briscoe

Chief Financial Officer

Melissa absolutely loves the mission of Bethesda and is grateful everyday she can be a part of it. She has worked or supported Bethesda Health Clinic and Hangers of Hope since 2014. Melissa earned her BBA in Accounting and has worked in healthcare accounting and management since 1995. Melissa loves her community of Whitehouse and has volunteered for WISD Education Foundation and Keep Whitehouse Beautiful, along with serving on the Parks and Recreation Board and committee.

Matt Humphries, MD

Matt Humphries, MD

Medical Director

Dr. Matt Humphries is board certified in Family Practice, and he has been practicing medicine since 1996. From 1996 to 2015, Matt served as a Medical Missionary in East Asia with the International Mission Board.  Matt holds a M.D. degree from the University of Texas Southwestern Medical School, and he completed his residency at the University of Alabama.  Matt also holds a B.S. in Biology from Baylor University.

Christine Wilson, RN

Christine Wilson, RN

Clinical Director

Christine Wilson is passionate about health and helping others, and she serves as Clinical Director. She has 29 years of nursing experience, with 10 being spent at a rural hospital in Southern Colorado and 15 in the missions’ field working with mobile medical teams and Community Health Evangelism in developing nations. 

Taylor Holland, DDS

Taylor Holland, DDS

Dental Director

Dr. Taylor Holland joined Bethesda fulltime in 2016 following 47 years in private practice. Taylor is a member of the Smith County Dental Society, East Texas Dental Society, Texas Dental Association and American Dental Association. Taylor holds a D.D.S from Baylor University College of Dentistry. He also graduated from Tyler Jr. College and holds a B.A. in Biology from North Texas State University.

Olga Ohrbeck

Olga Ohrbeck

Dental Manager

Olga Ohrbeck oversees the Dental office and staff. Olga has a BA in Hotel/Restaurant Management, and she worked over 40 years in restaurant management prior to joining Bethesda in 2018.

Chelsea Cohen

Chelsea Cohen

Patient Care Manager

Chelsea manages and develops the volunteer program, recruits volunteers and serves as the liaison between clinic staff and volunteers. She is regularly involved with the Bethesda Alliance and assists with Dr. Luke and the Birthday Bash. She also serves on the planning committee for Dia de las Madres. Chelsea holds a MA in Strategic Leadership and a BA in Business Administration from LeTourneau University. Prior to joining Bethesda in 2019, Chelsea worked in the veterinary industry for 7 years doing everything from managing a clinic and recruiting veterinarians to pharmaceutical and equipment sales.

Megan Riaz

Megan Riaz

Director of Community Relations

Megan Riaz joined Bethesda in March of 2018 and serves as Director of Community Relations. She earned her BA and MA degrees in English literature from UT Tyler and has a background in Public Relations, Marketing and Communications. Megan is a graduate of Leadership Tyler Core Class 31 and serves on the boards for SPORTyler and Rose Capital West Little League. Megan is a member of South Tyler Rotary and enjoys giving back to her community through service projects.

Don Bristow

Don Bristow

IT Director

Don Bristow came to Bethesda as a Database Consultant in 2013, then became IT Director in 2014. His background includes 20 years in the software development industry, 5 years as a fulltime professional photographer, and 13 years in the website design and hosting business.  Don received a BA in Liberal Studies (Elementary School Teacher Program) and a BA in Mathematics from Sacramento State University, Sacramento. He currently serves on the boards of the BBB of Central East Texas and Operation Go Quickly. He previously served on the boards of Greater East Texas IT Professionals, Innovation Advancing Education and Parent Services Center.

Broderick McGee

Broderick McGee

HR Director

Broderick McGee was born and raised in Tyler and attended public schools in the Tyler Independent School District. Upon graduating from John Tyler High School (class of 88), he received his Associates Degree from Tyler Junior College, a Bachelors Degree in Business Administration from Le Tourneau University, and a Master’s Degree in Human Resource Management from Columbia Southern University. Broderick served as the founding President of the Rose City SHRM Chapter and currently serves on the board of the Alzheimer’s Alliance of Smith County. He is also a graduate of Leadership Tyler Core Class 27. Broderick serves at the New Life Community Church and Liberty Baptist Church as the Minister of Music.

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