Our Team

Brad Harmon, DDS

Founder, Clinical Director

Dr. Harmon graduated from Cumberland College in 1995 with a Bachelor’s degree in Mathematics and went on to teach junior high and high school before joining the United States Army Reserves.

In the Reserves, Dr. Harmon received training as a dental assistant and worked closely with dentists in a Medical Support Unit in Louisville. He was so impressed with the advances being made in dental technology that he decided to pursue a career as a dentist.

In 2005, Dr. Harmon graduated with his DDS (Doctor of Dental Surgery) with Honors from The Ohio State University after serving on active duty in support of Operation Iraqi Freedom.

David Schellenberger

Founder, President

David Schellenberger is from Southern Indiana and holds a bachelors degree in Marketing and Professional Selling from Ball State University. David joined the dental industry upon graduation taking a job as a Sales Specialist with Henry Schein Dental. In his 5 years with Henry Schein, David received over 100 hours of training on the business of dentistry, visited over 3,000 dental offices, and consulted dozens of dentists on their business.

After falling in love with the dental community, David wanted to make a contribution and bring the best of private dentistry and the opportunities of “corporate” dentistry together. David takes pride in providing the best possible opportunity for dentists and team members to pursue their career vision.

In his free time, David loves to spend quality time with his wife, family and friends, enjoying the outdoors, and rooting on the Hoosiers.

Adrienne Nicholson

Practice Coach

Adrienne is the Practice Coach for our organization. She has been in the dental industry since 1998. She started her career as a chairside assistant has since obtained her CDA through the Dental Assisting National Board and Expanded Functions Certifications from Indiana University School of Dentistry.

Adrienne’s understanding of the clinical side of dentistry allows her to support our dental offices at multiple levels, from clinical and administrative. After 13 years of working as an assistant and EDFA, she changed directions in the dental profession to Financial Coordinator then Office Manager.

She has a passion for helping people and encouraging others to help people. Adrienne believes Jubilant Dental Partners is great because of its commitment to excellent experiences for patients, dental teams, and local communities. Adrienne has one son that keeps her busy at various sporting events. She also enjoys playing volleyball and working out in her spare time.

Thom Whittinghill

Marketing Manager

Thom Whittinghill has been in marketing and communications for more than 15 years. He has created and initiated marketing strategies for a seven-campus university system, non-profits, utilities, and health care organizations. A native of Southern Indiana, Thom has a bachelor’s degree in Communication and an associate degree in Journalism from Indiana University. 

In his spare time, Thom enjoys kayak fishing, hiking, piddling on the guitar and cheering on the Pittsburgh Steelers. 

Jake Koetter


Jake Koetter is from Southern Indiana and holds a bachelor’s degree in Business Economics and a Masters in Strategic Finance from Indiana University. Jake previously oversaw the accounting and finance operations for a large regional commercial insurance agency that focused on merger and acquisition activity. In his free time, Jake enjoys spending time with family and friends and playing golf.

What Jake loves about the dental industry is the sense of community, camaraderie, and willingness to help anyone and everyone out. Jubilant is special to Jake because of their mission to constantly strive to improve the lives of those they serve – patients, colleagues, and their communities!