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Galveston County Health District - Providing Credible Service since 1971

9850-A Emmett F. Lowry Expwy, Suite A102, Texas City Texas 77591 - Phone 409-938-2401

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Mailing Address:
P.O. Box 939
La Marque, TX 77568
Boards of Health Phone: 409-938-2401
 (Ex-Officio) Member

Harlan "Mark" Guidry MD, MPH
Chief Executive Officer & Health Authority
Galveston County Health District
1207 Oak Street, La Marque, TX 77568
Phone: 409-938-2401

Dr. Guidry is a board-certified family physician with ten years of experience as chief executive officer, public health official, and medical director.  He currently serves as the Chief Executive Officer of the Galveston County Health District - a position appointed by both health boards and which functions as the chief executive officer and as the district health authority.


  • University of Texas (UT) School of Public Health, Houston, Texas
    Master of Public Health (MPH), 1991-1992
  • UT San Jacinto Hospital Family Practice Residency Program, Baytown, Texas; 1988-1990 (Chief Resident 89-90)
  • Louisiana State University (LSU) Moss Regional Hospital, Family Practice Internship, Lake Charles, Louisiana; 1987-1988
  • University of Texas Medical Branch (UTMB) at Galveston, Texas; Doctor of Medicine (M.D.); 1983-1987
  • University of Texas at Austin, Texas, B.A. Biological Sciences; 1979-1983
  • Thomas Jefferson High School at Port Arthur, Texas; Graduate of 1979


  • Texas Department of Health; Regional Director, Public Health Region 6/5 South (a sixteen county area of southeast Texas), Houston Headquarters; 1997-2002
  • Texas Department of Health; Interim Associate Commissioner of Family Health, Austin Headquarters; May - October 2001
  • City of Beaumont; Public Health Director & Health Authority; 1993-1997
  • Various clinical practice settings; 1990-1993

  Selected Honors and Accomplishments

  • Board Certification: Diplomat, American Board of Family Practice; 1990, 1996, 2002
  • Certification of State Emergency Management Training: Department of Public Safety; 1997
  • Governor's Executive Development Program (Class XVII): Texas leadership development program for top state executives; LBJ School of Public Policy; 1998
  • Texas Board of Health Award; 2001.  While Regional Director, Public Health Region 6/5 South was awarded for its exceptional response to Meningococcal Disease Outbreaks in Southeast Texas in the Winter of 2001.
  • Texas Board of Health Award; 1998.   While Regional Director, Public Health Region 6/5 South awarded for "a performance record that exemplifies strong leadership, innovation, measurable performance outcomes, documented savings, human resource development, and exceptional customer service."
  • Various scholastic, literary, & historian
  • Various publications and manuscripts

  Selected Appointments

  • Statewide Health Coordinating Council; TDH agency representative; 2001-2002
  • TDH Commissioner’s Council of Local Public Health; Founding member and First TDH Executive Sponsor; 1998-2000
  • State Advisory Committee for Texas Preventive Health Service’s Federal Block Grant; TDH Regional Representative; 2000-2002
  • Advisory Committee for The Texas Public Health Training and Leadership Institutes; 2000-present
  • Regional Advisory Committee for Medicaid Managed Care & Children’s Health Insurance Programs (Chair); 1999-2002
  • ouse Concurrent Resolution 44 Workgroup and Subcommittee on developing a "Model Public Health Practice;" 1998

  Academic Affiliations

  • TDH Preventive Medicine Residency Training Program; Faculty Preceptor; 1997-2002
  • UT School of Public Health, Community Advisory Committee & Intern preceptor; 1997 - present
  • Baylor Family Practice Residency Program and San Jacinto Methodist Family Practice Residency Program; Preceptor for Resident and Fellow Physicians; 1997 – 2002
  • Texas Women’s University; Advisory Board Member & Intern Preceptor; 1999 – 2002
  • UTMB Galveston Preventive Medicine Residency Program; Residency Advisory Committee; 2000 – Present

  Professional Memberships

  • Texas Association of Public Health Physicians: President (1999-2000); Board Trustee (2000 – present); American Association of Public Health Physicians
  • Texas Association of Local Health Officials
  • Texas Public Health Association; American Public Health Association
  • Galveston County Medical Society; Texas Medical Association; American Medical Association
  • Texas Academy of Family Physicians: Director of Resident Chapter; (1989-1990); American Academy of Family Physicians, Family Practice Resident Scholar (1989)