Meet Our Roswell Dentists

Dr. Jeff R. DeMercy is committed to providing quality dentistry so that patients are happy with the beautiful aesthetics of their smile. He loves having a career that he enjoys. Bringing his daughter, Amanda Kossick, into his practice as his partner was one of the best decisions he has made. As a team, they are able to consult and solve difficult dental issues.

Dr. Jeff R. DeMercy received his bachelor’s degree in biology from Andrews University in southwest Michigan before continuing on to Loma Linda University for his dental education, where he graduated in 1985. He established his practice in Roswell in 1986, then in 2006 he was able to design and build our current location. Dr. DeMercy has received training in the relationship with dentistry and airway health. He works with several ENT’s in screening and creating intraoral devices for sleep apnea and has advanced training for Invisalign®. Education is a continual process with many study clubs and classes taken around the country to keep himself up to date on all the latest technology. Dr. DeMercy is a proud member of the American Dental Association and the Georgia Dental Association.

In his free time, Dr. DeMercy enjoys water sports, snow skiing, photography, golf and traveling.

Dr. Kossick strives to connect with her patients on a personal level and provide them with insight into their oral health through a systemic and holistic approach. She has loved growing up in this community and thoroughly enjoys seeing her patients. Family means so much to her and she is so grateful to not only care for families in Roswell but also work with her own. Roswell is an amazing place to work and live. She has loved watching our community grow and mature. It is a blessing to come to DeMercy Dental and provide care for Roswell.

Dr. Kossick received her undergraduate degree in Business at her father’s alma mater Andrews University before attending dental school at the Medical College of Georgia in Augusta, Georgia. She graduated and joined her father’s practice in 2013. She continues her education on a year-round basis through study clubs, courses, conventions, medical journals and online resources. She has specialty training in airway health, Invisalign® treatment and laser training for periodontal therapy. She has even received certifications for laser assisted periodontal surgery and airway screening. She is a member of the American Dental Association and the Georgia Dental Association.

When she is not working, Dr. Kossick loves personal fitness and health, traveling, reading, photography and spending time with her family.

Dr. Frassrand is a Georgia native who recently returned home after moving back to the state this year. Originally from Alpharetta, she is happy to be back in the area and is committed to providing empathetic care that helps patients feel understood throughout their dental experience.

Dr. Frassrand’s goal as a dentist is to relate to what her patients are going through and approach their care with empathy. Her perspective is also shaped by her own experience undergoing upper jaw surgery within the past year, an intensive dental procedure that has given her firsthand insight into what it can feel like to be a patient.

She earned her dental degree from the College of Dental Medicine of Illinois in 2024. Before dental school, she studied Human Nutrition at the University of Kentucky. She remains committed to continuing education through a local study club and several continuing education courses each year.

Dr. Frassrand is also passionate about volunteering in her community and plans to participate in TeamSmile events and other organizations. Outside of dentistry, she loves to travel and is always planning her next trip abroad. She is the youngest of three siblings and has an older sister and brother.