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Science Faculty


Erica Richardson graduated with her BS and MS in biology from The University of Texas at Tyler. Her thesis study was an electron microscopic study of the largemouth bass virus. She continued her studies in cancer biology at The University of Texas Health Science Center/M.D. Anderson Cancer Center in Houston where she researched tumor suppressor genes relating to grade IV GBM brain cancers. Ms. Richardson started teaching at TVCC in 2007 on the Terrell campus. She transferred to the Athens campus upon being hired for the Division Chair position in the fall of 2017. She teaches general biology, anatomy and physiology, and microbiology both in the classroom and online for TVCC. Ms. Richardson can be contacted via email at or in her office at 903-675-6262.

I’ve always had a love of nature and science. I received a B.S. and M.S. in Biological Sciences from the University of Houston- Clear Lake where I had the opportunity to pursue undergraduate research that led to a research publication as an undergraduate. I went to Texas A&M University for my Ph.D. in Biochemistry where I continued my research in plant molecular biology. After graduation I switched to molecule neurobiology at Baylor College of Medicine and later developed genetically engineered viruses for use in experimental gene therapy. I have published 20 peer-reviewed research articles and presented at numerous research conferences across the country. My hobbies are SCUBA diving, travelling, hiking, hunting, and tending my cows, chickens and goats.  Dr. Baumgartner can be reached at or in his office at 903-675-6363.

Thomas Booth began his college career at TVCC in 1995 and earned his AS in Biology in 1998. From there he attended Texas A&M Commerce and earned his BS in Biology in 2001. Thomas continued his education there, and earned his MS in Biology in 2004. His teaching career began at TVCC in the fall of 2012. Since then he has been teaching general biology and microbiology classes. Thomas teaches both traditional face to face classes and online classes.  Mr. Booth can be reached at or in his office at 903-670-2681.

Regina Weaks Clary is a graduate of Texas A&M University with both a B.S. and M.S. in genetics.  While at A&M, Regina studied the process of apoptosis in mouse embryonic stem (ES) cells.  After completing her master’s, Regina worked in the transgenic core at UT Southwestern Medical Center in Dallas where she was responsible for the generation of transgenic mice by gene targeting in mouse ES cells, microinjection, and blastocyst injection.  Regina went on to earn a Ph.D. in molecular carcinogenesis from UT MD Anderson Cancer Center and UT Health Science Center Houston-Graduate School of Biomedical Sciences in 2010.  Her dissertation research focused on the role of the E2F1 transcription factor in tumor suppression.  Regina has been with TVCC since 2010 teaching anatomy & physiology and microbiology classes on the Palestine campus.  She also serves as a Phi Theta Kappa advisor.  In her spare time, Regina loves to bake and enjoys all Aggie sports.  She and her husband Colby live in Palestine with their three dogs, Daisy, Liza, and Rosie.  Dr. Clary can be reached at or in her office at 903-729-7048.

Karla Clifton currently teaches Introduction to Anatomy and Physiology and General Biology for Trinity Valley Community College. She is originally from Texas but now lives in Southeastern Oklahoma with her husband and 2 daughters.  They raise stocker steer yearlings and the girls have horses they show in 4-H, and they also show exhibition poultry nationally.

Karla has an Associates of Applied Science Degree in Veterinary Technology from Murray State College.  She worked as an Equine Anesthetist before  going back to school at East Central University and earned her Bachelor of Science Degree in  Biology with Minors in Chemistry and Education.  While working at Paris Junior College, she went back to school again at Texas A & M University - Commerce and completed her Master of Science Degree in Secondary and Higher Education / Biology.

Karla taught Human Anatomy and Physiology I and II for Paris Junior College for 12 years and The Virtual College of Texas for 10 of those years. She taught Human Anatomy and Physiology I and II and General Biology for Grayson College for 3 years.  Mrs. Clifton can be reached at 

Sheree Daniel-Huddleston attended Eastfield college from 1985 to 1987. She earned her AA degree from TVCC in 1993. While attending TVCC, Sheree made the Dean’s list and earned honorable mention in a poetry contest. In 1998, Sheree earned her BS in Animal Science/Agriculture from Texas A&M Commerce. She made the Dean’s Honor list, was a member of Alpha Chi and the Honor Students Association, and a Houston Livestock Show Official while attending Texas A&M Commerce. In 1989 Sheree was a Regents Scholarship finalist. Sheree earned here MS degree in 2007 in a double major of biology and counseling.

Sheree began teaching nutrition as an adjunct professor at TVCC in 2008 and was hired on as a full-time instructor in 2010 on the Terrell Campus of TVCC. Sheree received the Ray Williams Teaching Excellence Award in 2016. Her favorite course to teach is here summer semester zoology course which is taught as a field biology study.

Sheree is married and lives at Cedar Creek Lake. She enjoys water sports, camping, and gardening.  Ms. Daniel can be reached at or in her office at 972-563-4946.

Brian Keith Duplechain, Jr., "BJ" has been married for 17 years to his wife, who is an internal medicine physician.  They have one son, Drake, who is in the 6th grade. BJ is currently a full time HS Biology teacher and also teaches online classes for another community college.  He graduated from the University of Mary Hardin - Baylor with a BS in Biology and has a MS in Biology from Texas A&M - Commerce.  BJ enjoy hunting, fishing, and shotgun sports.  

Mr. Michael Harman earned his BS in Biology with minors in both Chemistry and Oceanography in only 3 years from Edinboro University of PA and remained there and earned his Master’s in Biology with concentrations in Genetics, Ecology, and Cell Biology the next 2 years. He then spent 3 years of post-grad at Penn State University where he worked on gene cloning, enzyme kinetics, monoclonal antibody production, and gel electrophoresis. Returning to his alma mater, he earned a PA teaching certification (6-12) in biology.

Mr. Harman started as an adjunct for Gannon University before taking a FT position at Southern West Virginia Community and Technical College for two years. From there he moved to Saudi Arabia where he taught Anatomy & Physiology at King Faud Military Medical College for three semesters before being hired at Lone Star College in Houston TX. He remained at LSC for 14 years until Mr. Harman took his current position at TVCC. Mr. Harman mostly teaches Anatomy & Physiology, teaching traditional face-to-face, online, hybrid, Interactive Television, and dual credit classes.

While in West Virginia Mr. Harman created 2 protocols for testing and treating coal mine effluent, one for dissolved iron, aluminum, and manganese, the other for suspended solids. These methods were used nationally by the EPA until they were replaced by new methodologies. While in Houston, he and his students carried out a 2 year study on mosquito populations in northern Harris County, later presenting the results at a state conference alongside major TX universities.  Mr. Harman can be reached at or in his office at 903-675-6368.

Jan Jennings received a BS in Biology with an emphasis is microbiology and a MS in Freshwater Biology from SFASU.  Ms. Jennings worked in the health care field as a medical technologist for 15 years before moving to Athens in 1991.  She began teaching  at TVCC in  1995 and has taught freshman biology courses, microbiology, and anatomy & physiology courses on both the Palestine and Athens campuses.  She is a sponsor for the TVCC Science Club and has a passion for bringing the fun of science to children and adults.  Mrs. Jennings can be reached at or in her office at 903-675-6382.

Charles Nunnally was an Instructor of Agriculture at Wharton County Junior College, 1978-84.  In conjunction with this work, he also served as director of WCJC’s Hutchins Research Farm, 1983-84,  and for a brief period of time during the summer of 1980. During this time that he was teaching in the South Texas area, he also had summer employment with the Texas Agricultural Extension Service as a demonstration aide. Charles served as an Instructor of Horticulture, Trinity Valley Community College, 1984-98 and in Agriculture, 2000 – 2014. Charles has also served as a Professor of Biology, 1998 – present. Mr. Nunnally can be reached at or in his office at 903-729-7038.

Vernon L. Price graduated from Athens High School and from HCJC, now TVCC. He received his BS from East Texas State College with major in Biology and minor Broad Field Science (Chem, Physics, Earth Science). Vernon earned his MS from East Texas State University with major in Biology and received Ph.D. from Texas A & M Commerce. Vernon worked five years in food industry in Research and Product Development: Division of General Mills and has been teaching at HCJC/TVCC since 1969.  Dr. Price can be reached at or in his office at 903-675-6250.

Gary Reid is an Anatomy and Physiology I and II instructor. He has biology and MBA degrees from the University of Texas at Austin, graduate courses from Texas A&M Commerce and the University of Texas at Dallas.

Gary has 30 years corporate experience at Atlantic Richfield, a major integrated oil company specializing in planning and evaluation, operations research, crude future and options hedging, and lobbying.  In addition, he worked at Bank of America as a software testing manager and a project manager.

Gary is especially interested in cell biology, cardiac physiology, and endocrinology.

He enjoys fishing, golfing, and travelling.  Mr. Reid can be reached at or in his office at 972-563-4948.

Mary Van Cleve holds a B.S. Agricultural Sciences and a M.S. Biological Sciences/ Education. Mary has worked in other areas including bookkeeping for agricultural based businesses, regional service manager for fortune 500, Monitronics Intl before entering education. She taught high school prior to teaching community courses in Chemistry, Physics, IPC, Biology, and Environmental Sciences.  Ms. Van Cleve can be reached at or in her office at 972-563-4921.



Travis Dungan is from Florida, Pensacola to be exact. He now lives on Lake Palestine because it reminds him of home.

Mr. Dungan’s career started over 40 years ago as a Food Chemist for Campbell Soup Co, where he moved up the ladder to QC Mgr. Before entering the teaching field, he was R&D/QC Mgr for a Pharmaceutical Co for 2 years. 

Mr. Dungan has been a faculty member at six Colleges/Universities in East Texas before spending the last 15 years here at TVCC. He taught Chemistry, Meteorology, Geology and Astronomy the early half of his academic career, offering Chemistry the last few.

Mr. Dungan is an Organic/Analytical Chemist by training, specializing in Spectroscopic Identification using IR, UV-VIS, NMR, MS, GC, HPLC and other methods. He also has a strong personal and professional interest in water and wastewater treatment, starting with a lab tech job at the Environmental Protection Agency while in undergraduate school and growing up along the Gulf Coast. Mr. Dungan can be reached at or in his office at 903-729-7051.

Jim Guillory earned his BS in Physics with minor in Mathematics 1975. He completed his MS in Physics with a minor in Environmental Science 1978. Jim was a Semiconductor Process Engineer with Texas Instruments 1977 to 1983. He serves as a Trinity Valley Community College Instructor in Physics, Physical Science and Mathematics 1983 to present. Jim has completed additional graduate work in Physics and Education at University of Texas at Dallas, East Texas State University, Texas A&M University and University of Texas at Tyler.  Mr. Guillory can be reached at or in his office at 903-675-6365.