About Us


Marylin Cooper, DDS

Dr. Cooper was born in Pleasanton, Texas, and grew up in Jourdanton, Texas. After graduating from Jourdanton High School in 1984, she completed a bachelor’s degree in biology from Texas A&M University in College Station. Dr. Cooper received her Doctor of Dental Surgery (DDS) degree from the University of Texas Health Science Center in San Antonio in 1992. She completed a one-year residency in Advanced Education General Dentistry, after which she practiced in an associate position with a general dentist in Boerne, Texas, while also working at the Dental School as a part-time instructor in the Department of Oral Diagnosis and also the Department of Esthetic Dentistry. In 1995, Dr. Cooper purchased her current practice in Seguin. She met her husband, Carl Jenkins, in Seguin and was married in 1998. Her stepson, Colton, is six years older than their son Carson, who was born in 2001. Her private practice and family keep Dr. Cooper busy, but she enjoys fishing, hunting, cooking, church activities, and sports in her leisure time. She is a member of the Seguin Chamber of Commerce, American Dental Association, Texas Dental Association, and the River District Dental Society (in which she has served in several officer positions).

Tonya Hajek, RDH

Tonya was born in San Antonio and then moved to La Vernia where she graduated high school in 1996. She then attended the Dental Hygiene Program at the University of Texas Health Science and graduated in 2000. She joined our team in 2002 and in 2003 got married to her high school sweetheart, Jeff. Her daughter, Reagan, was born in 2004. In 2006 she took a break from hygiene to spend more time at home, rejoining our team in 2008. She now also has a son, Aden, who was born in 2007, and a daughter Harper who was born in 2012. She enjoys volleyball, fishing, and spending time with family. Tonya enjoys taking care of our patients and looks forward to seeing you.

Karyn Netardus, RDH

Karyn joined our office in July, 2014.  She graduated from the UTHSCSA dental hygiene program in 1993.  She is married to Hank Netardus and they have 2 sons Kory and Matthew.  When Karyn is not quilting, most of their free time is spent on weekend baseball tournaments or spending time with family.  Karyn looks forward to seeing you.

Jennifer Gutierrez, RDH

Jennifer joined our office in November, 2015.  She is a graduate of Coastal Bend College in Beeville and has been practicing Dental Hygiene since 2004. Jennifer is married to Jason and has two children, Jaxon and Jadyn. In Jennifer’s free time she likes to spend time with her family.  She enjoys getting to know all of the patients she meets and looks forward to seeing you.

Dawn Brown, RDA

Dawn joined our office in  November, 2014.  She was born and raised in Seguin, Texas.  She has been in the dental field since 1995.  She is married to Joseph “Scott” Brown and they have 2 sons Garrett and Ty.  They also have 4 dogs Max, Millie, Maci and Molli.  They love spending time together in Rockport and spending time with family.  Dawn looks forward to meeting you all and getting to know our patients.

Julie Stewart, Office Manager

Julie joined our office August, 2011. She was born in San Antonio and graduated from La Vernia in 1999, then attended Texas Lutheran University for Medical Assisting School. Julie is married to Jason her high school sweetheart and has one son, Jordan. She enjoys fishing, hunting, and spending time with family. She also enjoys getting to know our patients and looks forward to seeing you. Please call with any dental needs or questions you may have.

Debra Williams, Front Office Specialist

Debra joined our office in August, 2014.  She was born and raised in Seguin, Texas.  She is a 1994 graduate of Seguin High School.  She is married to Christian Williams and has one son Tyler.  They love going to Rockport, camping, going to the movies and eating out with friends.  Give Debra a call and she will be glad to help you with any dental needs or questions that you may have.