meet your doctor

meet your doctor

get to know us

Warrenton Pediatrics was founded in 2006, and Linton Hall Pediatrics was founded in 2019, by Dr. Michael Amster.

“Northern Virginia can be so fast-paced sometimes. I longed for a medical practice where I could really get to know my patients personally and feel like I was a part of their family.”

Michael S. Amster, M.D.

Dr. Michael Amster founded Warrenton Pediatrics in 2006 after practicing medicine for four years in Centreville, Virginia. Having moved out to Warrenton a few years prior, he felt a strong need to serve his local community. “I love being involved in the lives of my patients and their families. These are my friends and my neighbors.”

Dr. Mike, or “Dr. Hamster” as some of his patients address him, enjoys sharing his expertise with the community through teaching, both in the office and at the hospital. He is the founder of the Baby Cares Essentials Class currently being taught at Fauquier Hospital and is involved in organizations such as Child Nutrition, Inc. and the Fauquier School Health Advisory Board. “I feel it’s important to use my expertise to help the children in my community thrive.” Currently, Dr. Mike is on the Head Start board for Fauquier County.

As a board-certified Pediatrician since 2002, Dr. Mike has expertise in neonatal, childhood, and adolescent medicine. Promoting good health and development is the cornerstone to his practice, with special interests in developmental pediatrics, newborn care, adolescent health, and chronic illness management. He feels it’s vitally important to work with the whole patient and their family, including the mental, physical, nutritional, and developmental factors that make up every child. “One of my best rewards from practicing medicine is the partnership made between myself, the child, and their family.”

Dr. Amster initially graduated from Northwestern with Distinction with a Biology degree in 1994. He then earned his medical degree from the University of Illinois at Chicago School of Medicine in 1999. Having done his residency at the Medical College of Virginia, Richmond, he joined Union Mill Pediatrics in Centreville in 2002. He has held certifications in Neonatal Resuscitation and Pediatric Advanced Life Support.

Currently living in Warrenton with his wife and two children, Dr. Mike enjoys hiking with his girls in the Shenandoah and participating in school activities and events.

Cheryl Kemerer, M.D.

Dr. Cheryl Kemerer has been practicing pediatrics since 2000. Her previous practice was in Northeast Ohio and was affiliated with Akron Children’s Hospital. She was one of the “Lead Physicians” for Akron Children’s Hospital Physicians, a network of over 20 pediatric offices. She was also certified by the Ohio Bureau for Children with Medical Handicaps (BCMH) as a provider. With this certification, she was one of a select group of pediatricians able to serve as a primary care provider for children with complex medical conditions. She enjoys not only managing chronic and acute illnesses but also promoting health maintenance with preventive medicine. Dr. Cheryl has a wide range of special interests within pediatrics, including newborn care and lactation, developmental pediatrics, and adolescent health. She strongly believes in the importance of working with parents and families to provide the best care for her patients. “I love that as part of my job; I have the opportunity to watch children and families grow. I feel privileged to be a part of that growth.”

Dr. Cheryl has been board certified by the American Board of Pediatrics since 2000. She received her BS in Biology, with Honors, from Gannon University in Erie, Pennsylvania in 1993 and received her M.D. from Hahnemann University in Philadelphia in 1997. She completed her pediatric residency at Akron Children’s Hospital in 2000. She also held certifications in NRP, BLS, and PALS.

Dr. Cheryl lives in Haymarket with her husband, son and daughter. She enjoys reading, music, and being involved in her children’s school activities and sports.

Ashley Jeniec, MS, CPNP-PC

Ashley Jeniec is a board-certified Pediatric Nurse Practitioner and licensed through the Virginia State Board of Nursing and Board of Medicine.  She is credentialed through the Pediatric Nursing Certification Board.  

Ashley obtained her Bachelors of Science in Psychology from Virginia Commonwealth University and a Bachelors of Science in Nursing from Shenandoah University.  After obtaining her nursing license, Ashley gained extensive pediatric experience through neonatal and pediatric emergency care.  Ashley then went on to receive her Masters of Science degree as a Pediatric Nurse Practitioner from Old Dominion University, graduating with honors.  Prior to joining Warrenton Pediatrics, Ashley obtained further pediatric experience and training during her yearlong Nurse Practitioner Internship at Warrenton Pediatrics under Dr. Cheryl Kemerer’s supervision.  

With these skills and experience, Ashley has become a tremendous asset to the practice. She is a member of the National Association of Pediatric Nurse Practitioner, Sigma Theta Tau Honor Society of Nursing, and the Golden Key International Honour Society. In her spare time, Ashley enjoys spending time with her husband and children.  She also enjoys hiking, traveling, baking, and camping. 

Sooky Emmanuel-Frank, MS, CPNP-PC

Sooky Emmanuel-Frank is a pediatric nurse practitioner licensed by the Virginia State Board of Nursing and Board of Medicine. She is board-certified by the Pediatric Nursing Certification Board (PNCB).

Sooky began her nursing career as a licensed practical nurse prior to obtaining a Bachelor of Science in Nursing at Adelphi University. She continued her studies and obtained a Master of Science in Child Health Nursing at SUNY Stony Brook University. She was inducted into the Kappa Gamma chapter of Sigma Theta Tau International Honor Society of Nursing.

Sooky comes to Warrenton & Linton Hall Pediatrics with over 10 years of pediatric nursing experience, to include school health, neonatal intensive care, and pediatric intensive care. Prior to joining our practice, Sooky worked as a nurse practitioner in a practice specializing in pediatric primary and urgent care. Her interests include neonatal care and preventative medicine. She holds certifications in BLS, ACLS, NRP and PALS.

Sooky, a New York native, relocated to Virginia, settling in Culpeper County with her husband and son. On her spare time, Sooky enjoys spending time with family and friends, traveling, cooking, listening to music and dancing.

Ask The Doctors

We like to make sure that you have easy access to the answers for the hard to ask questions. Check out our videos here about gun safety, vaccines, and water safety.