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.  Dr. Cooper has been practicing here in Seguin for over 25 years.  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.


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.  She is anxiously awaiting the arrival of her first granddaughter  Addison in July of 2020.  They also have 3 dogs Maci, Molli and Mia.  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.



Lydia Montoya, Front Office Specialist

Lydia joined our office in August, 2017.  She has been in the dental field for 20 years and before joining our team she had experience working for an orthodontist and a periodontist.  Lydia is married to Tommy and has three sons and two precious grandchildren, Landon and Isabella.  She loves spending time with her grandchildren. Give Lydia a call and she will be more than happy to help you with any dental needs or questions that you may have.


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