Demko Smiles Staff

Trustworthy. Empathetic. Efficient. Invested.

At Demko Orthodontics, we want patients to feel at ease when they walk into our office. Our team is experienced, accessible and authentic, and they will take your treatment as seriously as you do.

Dr. Demko hand picks and cross trains her entire staff, resulting in an extremely informed, well-versed, and capable team that can address all patient needs and questions. Because of their talent, passion, and synergy, the Demko team is ready and able to handle all orthodontics issues, no matter how challenging they may be.

Chesterfield Location

Holly Klaesner

Holly Klaesner

Treatment Coordinator

Since 2005, Holly has been helping patients achieve beautiful smiles, and she has loved every minute of it. As a treatment coordinator, she assists Dr. Demko during new patients’ visits and walks them through the treatment process.

Holly is married with two girls and a dog.  Her family enjoys spending time together swimming, boating, and vacationing in Florida.

Heather Openlander

Heather Openlander

Office Manger

Since joining Demko Orthodontics in March of 2007, Heather has devoted herself in making the Demko Orthodontic experience for every patient the best it can be.  Having been in the orthodontic field since January 0f 2004, she knows what is important to the patient and will work to have those needs met.

Heather enjoys life away from work, as well.  Whether it’s her annual trips to Walt Disney World or relaxing with a good movie, she makes the most of her off-time.  She keeps herself busy with family commitments, her cat Walter and spending time with her husband Kirk.

Brandy Dean -Patient Coordinator

Brandy joined the team at as a Patient Coordinator in 2016. She enjoys getting to know our patients and their families.  She loves the warm and caring environment that our office provides to our patients and happy to be a part of this staff.

Brandy also has 2 daughters and a wonderful family. She enjoys spending time with her children and family during her off time. Her family enjoys going on road trips, swimming, and going to the beach.


St. Charles Location

Donna Moore

Donna Moore

Treatment Coordinator

Donna has been with Demko Orthodontics since January 2003 and has been in orthodontics for the past 25 yrs. Donna enjoys working with Dr. Demko to help create beautiful smiles.

In her free time, Donna loves spending time with family,friends, shopping, and reading a book.

Debbie Skelton

Debbie Skelton

Lab Technician/ Clinical Assistant

Debbie has been with Demko Orthodontics since January 2003,

She has been in the dental field most of her working years and in the orthodontics for 25 years. She is a clinical assistant and a lab technician.

Debbie is married and loves to spend time with her family, most of all with the grand kids., she loves to work in the garden and for quiet time loves to sit and read a good book.

Nicole Heater – Patient Coordinator

Nicole HeaterNicole joined the Demko Orthodontics team in February of 2014, first as a clinical assistant and now as a patient coordinator in our St. Charles office.

Nicole loves working at Demko, because she gets to interact with amazing patients whose smile always light up a room.

Nicole loves spending her time with her husband Joel and their two sons Max & Isaac. She also enjoys playing volleyball and watching Blues hockey.

Washington Location

Kerry DeJesus

Kerry DeJesusKerry has worked for Dr. Demko for more than eleven years. She started out as clinical assistant, then patient coordinator for the Washington location, now works part time helping out wherever she can. She enjoys getting to know the patients and families of the practice. She says she loves watching the kids of the practice grow up.

Kerry and her husband, Mike are the proud parents of a 7 yr old son, Seth and twin 3 yr. old boys, Colin and Caden. She works hard to keep her sanity by getting out of the house and coming into the office for a “break”. In her spare time, she enjoys just spending time and goofing off  and spending time with her family.  She recently moved into a fixer upper and has fixing up the house with her husband and sons. She tries to sneak in a little pink here and there to break up all the blue due to being outnumbered by all the boys in her house. 

Sydni Filla – Patient Coordinator

Sydni Gaddy

When not helping the Demko family create memorable smiles, Sydni likes to be creative on her own by crocheting or crafting.

You can often find Sydni out on weekends with her husband Nick watching their daughter, Kaitlyn, play soccer or just enjoying family time barbecuing, playing games, or shopping.



Clinical Team

JoAnn Hirt

JoAnn HirtJoAnn is a certified dental assistant and has been in the orthodontic field for 20 years.  She is also a lab technician and makes retainers. Even has her own small lab business.

She enjoys seeing the patients progress on their way to a beautiful smile while working in a friendly and positive atmosphere.

JoAnn has been married for 36 years and has 3 wonderful children and 4 grandkids. Loves spending time with family and friends. She is involved in her church , likes to travel, garden and works on craft projects.

Eleisha Haley

Originally from Kentucky, Eleisha relocated to Missouri in 2009. She joined the Demko Family in March of 2016 when she switched to orthodontics from being executive chef. Eleisha loves to cook & her cat Ayda.  Some of her favorite activities are going to the botanical gardens & forest park.

Rachael Cross

Rachael has been with Demko Orthodontics since December 2016. She graduated from Missouri College in 2013 and has been working in the Orthodontic field since. Rachael loves working at Demko because she loves helping people change their smile and confidence.

In her spare time, Rachael likes to spend time with her family. She especially likes spending time with her daughter, Amelia. She also enjoys food, traveling, music and painting.

Chelsea Ohl

Chelsea joined the Demko team in May of 2017. In her short time with Demko she has seen what an impact a great smile can have.

Chelsea loves getting to spend time with her husband Ty and daughter Olivia. They enjoy spending time at the lake with their family during the summer.

Travis Dickens

Travis started as an intern in our Washington office in January 2016. He began as a clinical assistant in November 2016. Travis loves working with our patients and bringing out their best smile.

In his spare time, Travis likes to spend time with his family and close friends.