Meet the Team

Dr Joseph A. Miller, DMD, MBA, FAAID, DABOI/ID

Joseph A. Miller, DMD, MBA, FAAID, DABOI/ID

Dr. Miller attended high school in Rancho Cordova and completed his undergrad at UC Davis. He earned his Bachelor’s degrees in Spanish and International Relations. During his studies, Dr. Miller traveled abroad to many parts of Central and South America, and studied at the University of San Jose, Costa Rica.

After college Dr. Miller applied to The University of Puerto Rico, School of Dental Medicine and was accepted as one of the first American students in over 20 years. He graduated from dental school in 2009 where he was commissioned as an officer in the United States Navy. Dr. Miller completed an Advanced Education in General Dentistry (AEGD) Residency at the prestigious Naval Base / Naval Hospital San Diego, CA. Dr. Miller also completed a Master’s in Business Administration while stationed with the Marine Corps in Twentynine Palms, California. While in the Navy, Dr. Miller worked directly with and under the mentorship of over 20 different specialists in all areas of dentistry.

Dr. Miller comes to the practice with a wealth of knowledge and dental experience. He continues to expand his knowledge through continuing education. In 2019, Dr. Miller graduated from the prestigious Implant Maxicourse in Puerto Rico where he studied under the mentorship of the well-known and legendary Hilt Tatum Jr., who pioneered implant dentistry and bone grafting techniques. In 2021, Dr. Miller challenged and passed the rigorous boarding process to be awarded Diplomate of the American Board of Oral Implantology/Implant dentistry. He is also a Board Certified Fellow of the American Academy of Implant Dentistry.

Dr. Miller is married and has 4 children. Dr. Miller loves the outdoors, and enjoys hiking, camping, fishing, golfing, and playing with his children. You may run across him cycling as he loves to participate in Ironman triathlons!


Debby Coffey, Assistant Office Manager/Insurance Specialist

My name is Debby Coffey, I was born in Milwaukee, Wisconsin and moved to Grass Valley, California when I was 6 years old. I graduated from Nevada Union High School. After graduation I attended Sac City College and Sierra College. After starting a family, I worked in the electronic industry for Grass Valley Group and Eigen Video. Having three small children I chose to work in the dental industry. I worked for Dr. Wayne Hood and Dr. Craig Zelenka, which turned out to be a lifelong career. After Dr. Hood and Dr. Zelenka retired and sold the practice to Dr. Dana Gawley and Dr. Jeff Gawley I was lucky to continue in the practice as office manager. I now have the pleasure to be working for Dr. Joseph Miller. It is with great enthusiasm to work in my third transition in this practice with our wonderful staff and great patients.


Courtney Stevens, Treatment Coordinator

I was born in Nevada County and graduated from Nevada Union High School. I attended the 49er Regional Occupational Program in Auburn for Dental Assisting in 2004. While interning, I was hired full time and have been in the dental field ever since. I enjoy working with others and as a team. I am a mother of two boys, Austin and Dominic. In my free time, if not spending it with them, I love cooking and water/outdoor activities.


Sandy Schrezenmeier, Dental Hygienist

I am Sandy Schrezenmeier. I have lived in Nevada County area since 1979. I grew up in Southern California on the beach (how fun!) I attended University of Utah and completed my Dental Hygiene degree at Sacramento City College. I have been a part of the practice through 3 owners and enjoy the patient relationships I have built through many years and I look forward to many more. It has been such a pleasant surprise and wonderful experience working with Dr. Miller. Every day I look forward to working with him. Not only is he an excellent clinician but he truly cares about his patients and his staff members. Every day he brings to the office a smile, enthusiasm, and positive energy. I invite you to be a part of Pine Hills Dentistry as a new patient, returning patient or existing patient. We welcome the opportunity to meet you and to provide a positive dental experience.


Angela Wallis, Dental Hygienist

Hi, I’m Angela. I was born in Spokane, WA, raised in the United States Air Force. In 1995, I settled into South Lake Tahoe, California, where I raised my boys and began my dental career. Since then, I’ve achieved my BS from the University of Pacific in Dental Hygiene. In 2017, I relocated to Nevada City, California, dedicating my time to my passion for patient care. I enjoy being back in the mountains with my family, fishing, camping, hiking, and most of all, watching my youngest son Drew play Nevada Union Junior Minor football. I am grateful to have met Dr. Miller and feel very fortunate to be a part of his amazing team at Pine Hills Dentistry.


Michelle Ollar, Registered Dental Assistant

My name is Michelle Ollar. I’ve lived in Nevada County area since 1996. I have two young daughters, Grace and Charlotte. I attended Sierra College to become a teacher when I realized I was not working towards something I wanted anymore. I want to help people in a different way so I enrolled in R.O.P. in Auburn for Dental Careers. My career started in 2009. I am a Registered Dental Assistant.


Mikayla Murray, Registered Dental Assistant

Mikayla is a dedicated dental professional with over 15 years of experience in the field. Born and raised in Auburn, CA, Mikayla relocated to Nevada County in 2013. She kick-started her career by attending ROP for Dental Careers in 2008, earning her CA RDA license in 2009. Throughout her career, Mikayla has primarily worked chairside with doctors and patients, gaining invaluable hands-on experience. She also has experience working in the front office, which allows her to provide comprehensive patient care.

Mikayla finds joy in all aspects of dentistry, but she particularly thrives when assisting Dr. Miller in surgeries. When she’s not in the office, Mikayla cherishes spending quality time with her 15-year-old son, Holster, and supporting him at his motocross races. Joining the Pine Hills Dentistry team has been an exciting opportunity for Mikayla to contribute to the delivery of exceptional patient care.


Sheri Roberts, Registered Dental Assistant

Sheri Roberts is a dental professional with 19 years of experience in the field. She obtained her Dental Assistant (DA) license from Western Career College and later graduated from The Fade Institute as a Registered Dental Assistant Extended Functions (RDAEF2).

In her spare time, Sheri enjoys spending time with her family and furbabies, as well as participating in off-road rock crawling.

With her knowledge and dedication to providing dental care, Sheri is a valuable asset to the Pine Hills dental team.


Lily, Director of Marketing

Bio coming soon!


Shanna, RDAEF

Bio coming soon!


Deanne, RDH

Bio coming soon!

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