Meet the team

Give Kids A Smile Staff

Kourtenay Green, DDS

Executive Director

Dr. Kourtenay Green holds a Bachelor of Science from Jackson State University in Biology, a Doctorate of Dental Surgery from the University of Missouri – Kansas City School of Dentistry, and many years of experience as a dental professional and nonprofit executive. Her passions lie in dentistry, health education, public health, and of course, serving children, their caregivers, and their support systems. Dr. Green is overly excited about leading the GKAS team into its future while preserving its history and roots.

Abby Clanin

Administrative & Program Support Specialist

Abby Clanin earned a B.S. in Human Ecology with a concentration in Child Life from Tennessee Technological University, where she studied how to support the emotional and developmental needs of children, particularly in healthcare settings. With this strong foundation in child development, she is passionate about helping every child who comes through GKAS feel safe, seen, and cared for. Originally from Tennessee, Abby moved to St. Louis in 2022 and was introduced to Give Kids A Smile shortly after. A few years later, she volunteered at the 2024 Fall Clinic—an experience that truly deepened her connection to the organization and its impact. She is proud to be part of the GKAS team and contribute to its mission of expanding access to quality dental care for children. Outside of work, Abby enjoys cooking, playing the violin, and spending time with her husband and their two dogs.

Give Kids A Smile Board of Directors

Craig Hollander, DDS, MS, FACD, FICD

President

Dr. Craig Hollander is a pediatric dentist who has been involved with GKAS since its inception. He assisted with the development of the Tiny Smiles Program which provides dental screenings for infants and toddlers, and counselling for parents with regard to proper feeding habits, dental caries prevention and proper home oral hygiene. He has received numerous awards for his continuous strives to improve access to dental care for children everywhere in Missouri.

Romana Muller, EdD, MSDH, BA, CEPH, RDH

Vice President

Dr. Romana Muller is an associate professor at A.T. Still University’s Missouri School of Dentistry & Oral Health (ATSU-MOSDOH). Dr. Muller holds a Bachelor in Healthcare Management degree from Webster University, a Master in Dental Hygiene from Eastern Washington University, a Certificate in Public Health and a Doctorate in Education in Healthcare Professions from A.T. Still University. She is the director of the grant-funded project “In Any Language, Improving Oral Health Translates into Better Lives”, and the recipient of the 2022 ATSU Underserved Community Scholarly Improvement grant. Dr. Muller is passionate about improving patient-provider communication and removing language barriers to dental care access. Since joining the board of the St. Louis Give Kids a Smile organization in 2023, she has worked diligently on improving access to linguistically appropriate care for children and their parents attending the free biannual dental clinic. In 2026, she was elected Vice President of the Give Kids A Smile Board of Directors.

Kelly Jobe, DDS

Secretary/Treasurer

Kelly Jobe is a St. Louis native and Pediatric Dentist. She’s been volunteering with Give Kids a Smile since before attending dental school. She loves helping kids achieve a beautiful smile. When not treating patients, she enjoys spending time with her family and traveling.

Tyler Crews, DMD

Member At Large

Dr. Tyler Crews has been a general dentist since 2013. He has a private practice located in Webster Groves. He understands that access to dental care for those who need it most is a huge problem. Give Kids a Smile organization is a passion for Dr. Crews as it strives to solve this problem in St. Louis.

Tiffani Dickey, RDH

Member At Large

Tiffani Dickey is a dedicated registered dental hygienist with a passion for pediatric dentistry. Since 2012, she has been actively volunteering with the Give Kids A Smile (GKAS) program, believing that every child deserves access to quality dental care. She is committed to creating positive dental experiences for young patients and promoting lifelong oral health. In her spare time, Tiffani enjoys spending time with her husband and dogs, hitting the golf course, and always looks forward to their next travel adventure.

Courtney Ethington, DMD, MSD

MEMBER AT LARGE

Dr. Courtney Ethington is a board certified orthodontist. She was born and raised in a small town in central Kentucky and obtained her undergraduate and dental degree from the University of Kentucky, GO CATS! She moved to St. Louis in 2017 and fell in love with the midwest while obtaining orthodontic training at St. Louis University. She loves being an orthodontist where she can interact with wonderful patients everyday all while creating beautiful smiles.Outside of the office, Dr. Ethington loves to travel, hike, ski, cook, try new restaurants, and spend time with her husband, Phillip, and their dog, George.

Mary Gan

MEMBER AT LARGE

Mary Gan started her career in dentistry as a dental assistant over 22 years ago. She is currently the Practice Administrator at Healthy Smiles of Saint Louis. Her first GKAS clinic was in 2010, after beginning to work with Dr. Flavin (former GKAS President). Prior to joining the Board. Mary has served GKAS as a lead volunteer and dynamic fundraiser. She feels very fortunate to work alongside many amazing dental professionals and community volunteers and extremely honored to be on the GKAS Board.

Michael J. Hoffmann, DDS, FACD, FICD, FAGD, FADSA

Member At Large

Dr. Michael J. Hoffmann received his dental degree in 1988 from The University of Texas Health and Science Center in San Antonio. He has also completed residencies in Hospital Dentistry and Dental Anesthesiology. Dr. Hoffmann is very active in organized dentistry. He is a past President and current Treasurer of the Greater St. Louis Dental Society and a member and chairman of various committees at the state and national level. Dr. Hoffmann enjoys CrossFit training, researching the Paleo Lifestyle, hunting, boating, and barbecuing in his spare time. He resides in Kirkwood, Missouri, with his wife and four children.

Nevin Mathai, DMD

MEMBER AT LARGE

Nevin Mathai is dental director at Delta Dental of Missouri. He is responsible for managing its dental networks, serving as an advocate for dentists, as well as interpreting dental policy and procedures. also serves as assistant clinical professor in operative dentistry at Southern Illinois University School of Dental Medicine. Previously, he practiced dentistry in the St. Louis metro area. He has received many honors in dentistry, including the Outstanding Achievement Award in Operative Dentistry from the Academy of Operative Dentistry. He earned this Doctor of Dental Medicine from Southern Illinois University School of Dental Medicine. He also earned a BS degree in health management and policy from Saint Louis University, and a Master of Arts degree in biblical and theological studies from Covenant Theological Seminary. Outside the office, he enjoys reading, trying new coffee shops, and spending time at the Art Museum with his wife and two boys.

Danielle M. Riordan, DDS

MEMBER AT LARGE

Dr. Riordan is a General dentist in St. Peters, MO who practices with her father at Family Dentistry of St. Peters. Dr. Riordan has been active with GKAS-STL since 2002, first as a volunteer, then as a dental student, and now as a board member. She enjoys not only giving back to the community through the program, but also working with dental students instilling that same passion of giving back to them. Aside from GKAS, Dr. Riordan plays an active role in the organized dental community holding leadership positions with in the local component, state, and national levels.

Director Emeritus

Jeffrey B. Dalin, DDS

Dr. Dalin is a general dentist in Creve Coeur. He started working with his father after graduating from Indiana University School of Dentistry in 1980 and now is practicing with his son and nephew. Jeff has been involved with St. Louis Give Kids A Smile since its inception back in 2001. He has also served on the advisory board of the American Dental Association Give Kids A Smile Program since they adopted GKAS as their national children’s dental access program back in 2002. One day, he hopes to see all children have access to dental care on a routine basis. Their dental health will be much better…they will be able to pay attention in school…they will have better self-esteem…they will eat and sleep better…they will no longer have to suffer with dental pain.