The TSAOHN Board of Directors is composed of the following:
- President: Hilda Wist
- President Elect (Membership/Parliamentary Process ): Dr. Levinda Walpole
- Secretary (History/ Archives): Julia Reyes
- Treasurer:
- Election Advisor: Mary Garison
The Directors are appointed to the following positions:
- Director I (Governmental Affairs/Bylaws/Policy and Procedure): Henry Guevara
- Director II (Communications/Publicity ): Marsha Vanlandingham
- Director III (Professional Affairs/Conference/ Vendor Relations):
- Director IV (Awards/Recognition/Benevolence): Karen Parker
The Board of Directors meet three times a year and an invitation is extended to each of the local chapter presidents to attend.

I am honored to serve as President of the Texas State Association of Occupational Health Nurses, where I have also held various positions on the board of directors over the past decade, including President of the local Houston chapter. My 55-year nursing journey, driven by a deep passion for healthcare, began with a Bachelor of Science in Nursing from Texas A&M University and continued with a Master of Science in Nursing, specializing as a Family Nurse Practitioner, from Prairie View A&M University. Currently, I am an Occupational Health Nurse Practitioner at Prime Occupational Health Services. I also dedicate my time to medical missions overseas and to Casa El Buen Samaritano here in Houston. Previously, I managed the on-site urgent health clinic for Enbridge Corporation, served as a Registered Nurse at St. Joseph Medical Center, worked as an Occupational Health Nurse at Shell Oil Company (contractual), and led the Occupational Health Department at Goodman Manufacturing Company. Serving as President is a profound privilege. I am inspired by the opportunity to lead our profession to new heights and am grateful for the dedication and support of our members. Together, we are not just meeting standards—we are setting them, paving the way for a future where our impact on occupational health is transformative and far-reaching.

I hold the position of Director of Governmental Affairs, Bylaws, and Policies and Procedures. Additionally, I work as a Nurse Practitioner for the Neuralink Corporation and serve as an Adjunct Professor at the University of Texas at Austin, teaching in the graduate nursing program. Over the years, I have held various leadership positions, including President, and served as a Director for TSAOHN, AAOHN, and ATAOHN. As occupational health nurses, we continue to face challenging times, and I am eager to contribute to our professional organization in ways that benefit our entire group. Henry Guevara, PhD,MPH,APRN,FNP-C

I have worked as a public health nurse, and school nurse before retiring as a senior occupational health nurse at Texas Children’s Hospital. I worked at TCH for a total of 14 years. I started at the Texas Medical Center location and worked there for 10 years. I then opened the Employee Health office at the new TCH in The Woodlands. I worked at The Woodlands location for 4 years. What a blessing this was as I truly enjoyed the position! I am happy to serve and looking forward to my time as the Director of Communications. Thank you Marsha Vanlandingham, BSN, RN Retired Senior Occupational Health Nurse

My name is Karen Parker and I am the Senior Corporate Occupational Health Nurse at Phillips 66. I currently serve as the Election Advisor for the Houston Chapter of Occupational Health Nurses. As a director on the Texas Board of Occupational Health Nurses, I will work tirelessly with the board to help provide the members with tools that will help to grow the membership as well as offering other strategies needed to maintain the sustainability of our organization. I also see this as an opportunity to learn and grow within my profession to help it prosper.

