Dr. Manuela Murray received her medical degree from Instituto de Ciencias de la Salud Medical School in Medellin, Colombia in 2002. She completed her residency in Pediatrics at UTMB in 2008.

After finishing this training, she was promoted to the rank of Assistant Professor and currently serves as the Medical Director for Pediatric Urgent Care Centers and Ambulatory Operations. She is Co-Director for General Academic Pediatrics.

Her goal is to provide excellent patient care at every encounter and to make sure every patient and parent leaves the clinic with all their concerns addressed and questions answered.

My name is Nyajuok Wur. I am originally from South Sudan, born in Ethiopia, raised in Minnesota and currently living in Houston, TX. My passion for medicine began at a young age and my desire to help others continues. I chose family medicine because of the variety as well as the opportunity to work with people from all ages and backgrounds.

Hobbies outside of medicine include reading mystery books, international travel, and singing.

Dr. Uzoma Obi-Nwankwo is a Board-certified Family Physician with specialized training in Geriatric Medicine. She received her medical degree from Ebonyi State University, Nigeria. She completed her Family medicine Residency training at DeTar Healthcare system-Texas A&M university program and her Geriatric Medicine Fellowship training at the University of Texas Medical Branch.

Dr. Obi as she is fondly known by her patients and staff is passionate about tailoring individualized quality and compassionate care to her patients and their family’s unique needs through timely value-based care and shared decision making. She loves that she can provide medical care for all age groups and relate and serve them in a one stop, shop all manner. She funnily describes her role as PCP as that of the postal services such that she helps her patients address and bring together all information in their various aspects of health care to clarity and perspective with the goal of a healthier and functional status.

When she is not doctoring, she loves to spend time creating good memories with family and friends. She enjoys volunteering both locally and internationally, traveling, watching wrestling or action and adventure movies, learning American football and crafts and trying out new cultures and food.

Dr. Crystal Sierra joined UTMB Health in November 2010.  After completing her undergraduate studies at The University of Texas - Pan American in Edinburg, Texas, Dr. Sierra earned her medical degree from The University of Texas Medical Branch in Galveston in 2006. In 2009, she completed her Residency in Pediatrics at UTMB. Prior to working for UTMB, Dr. Sierra worked as a pediatrician in Clear Lake.

Dr. Sierra is board certified by The American Board of Pediatrics. She is also certified in Basic Life Support and Pediatric Advanced Life Support. She has her Texas medical license, and is a member of The American Academy of Pediatrics.

Dr. Sierra is married to Dr. James T. Sierra, a dentist in Friendswood, and they have two beautiful daughters, Gabriella and Francesca.  Dr. Sierra is fluent in Spanish and also enjoys reading and traveling with her family in her spare time.  She has enjoyed living in the area, and is excited to be giving back to the community!

Married for 36 years to Dr. Tommy Sim, an allergy/immunology specialist in Friendswood, TX. Dr. Sim is a proud mother of 3 children; Tom, diagnosed with Autism, graduated from University of Houston in HRM, currently employed at UTMB Health Clear Lake Campus hospital; Timmy, graduated from Baylor University with a BS in Biology, currently schooling in Computer Science at UHCL; and Theresa, graduated with a BS in Chemical Engineering from UT Austin. I feel empathetic to parents with children with disability. I feel a need to share my family's story about my eldest son with Autism and maybe can inspire somebody like him to strive and succeed.

I am grateful for the opportunities that came my way. I am honored for the trust that parents have given to me to take care of their children's health. I feel rewarded when I see my patients grow up healthy and become good citizens.

Her professional associations include the Texas Pediatric Society, Bay Area Pediatric Society and the Harris County Medical Society.

She believes that good listening leads to good care and appreciates the opinions of parents.

In her spare time, she enjoys playing the piano, reading and traveling with her family.

Dr. Mariam Khan’s journey into medicine began with a passion for primary care, driven by the desire to build enduring relationships with patients from childhood through their golden years. While completing her medical degree at UTMB, she was initially drawn to pediatrics, and ultimately found her calling in UTMB’s Family Medicine residency program, influenced in part by her husband’s great experience within UTMB.

Dr. Khan's commitment to UTMB didn't end with her training; she chose to stay on as a practicing physician after completing her residency in 2023 and lives in the area. This decision was influenced by the camaraderie among UTMB graduates who have chosen to remain at the institution. She appreciates the stability and strong connections that come from this tight-knit community of medical professionals.

In her clinical practice, Dr. Khan's special interests lie in preventative health and evidence-based medicine, and during residency, was recognized for her dedication to compassionate care with the Arnold P. Gold Foundation Humanism and Excellence Teaching Award. She thrives on the daily challenges of her role and takes an approach involving motivational interviewing to empower her patients in managing various health issues, whether related to mental health or chronic conditions like diabetes. Her persistence and ability to connect with her patients shine through as she helps them navigate their health journey. Outside of her medical career, she cherishes family time, enjoys traveling, and has a passion for cooking.

Dr. Jean McAtee joined UTMB Pediatric Community Based Clinics in 1995 after completing her pediatric residency at Baylor College of Medicine.  She earned her medical degree from the University of Texas Health Science Center in Houston.  With a commitment to ongoing continuing medical education, she maintains board certification by the American Academy of Pediatrics. She also serves on the school health advisory board for CCISD.

Dr. McAtee's practice focuses on preventative care, including maintenance of childhood immunizations, promoting safety measures and encouraging families to help their children maintain a healthy body weight.  As a mother of four children, she understands the concerns of parents; therefore, she encourages active involvement from them regarding their children's health care.  Her scope of practice includes patients from birth through 18 years of age.  In addition to treating common childhood illnesses, she has experience in caring for children with allergies, asthma, atopic dermatitis/eczema and attention deficit disorder.

Brittany Menefee was born in the great state of Texas and was raised in Galveston County. She obtained her Bachelor of Science in Nursing from Texas State University in 2012. Brittany started her nursing career as an Emergency Room RN in Round Rock, Texas. She then moved back to the Houston area, to be closer to family, and began working as an Emergency Room nurse at Ben Taub Hospital. Brittany continued working at Ben Taub throughout her Master's degree program. She graduated from the University of Texas Medical Branch in Galveston, Texas in December 2017. Brittany is board certified as a Family Nurse Practitioner by the American Academy of Nurse Practitioners.

Brittany enjoys spending time with her family and her rescue dogs.

Dr. Amber Hairfield joined UTMB Pediatrics as faculty in 2011. She is an Associate Professor of Pediatrics and board certified by the American Board of Pediatrics. Dr. Hairfield received her doctorate from the University of North Texas Health Science Center in Fort Worth, Texas. She also completed her residency in Pediatrics at the University of Texas Medical Branch in Galveston, TX.

Dr. Hairfield has a special interest in medical education and is currently serving as the Pediatric Residency Program Director at the University of Texas Medical Branch (UTMB) in Galveston.

In addition to serving in various medical education committees, Dr. Hairfield also serves in a few UTMB Quality Improvement committees for academic pediatric clinics

Dr. Michael Binder received his MD from Texas Tech University Health Sciences Center in Lubbock, TX and completed his pediatrics internship and residency at the University of Texas Medical Branch in Galveston. Dr. Binder is Board Certified in Pediatrics by the American Board of Pediatrics. His clinical interests include all aspects of pediatrics and seeing his patients develop through the physical, emotional and social health through infancy through adolescence and young adulthood.