Dr. Keller is board certified in dentistry in addition to being a Diplomate of the American Board of Dental Sleep Medicine. He holds a Masters of Science in Orofacial pain and Oral Medicine. Dr. Keller is currently a clinical Assistant Professor at the Orofacial Pain Center at the USC School of Dentistry. He is also a fellow of the International Congress of Oral Implantology and serves as a member of the Scientific Committee and the Academic Dental Sleep Council at the American Academy of Dental Sleep Medicine.

In addition to teaching, Dr. Keller maintains a private practice in Simi Valley, California where he provides treatment for TMJ and other orofacial pain with state of the art technology. Within his practice he also treats chronic obstructive sleep apnea with oral appliance therapy (OAT). Dr. Keller also provides cosmetic dentistry services including teeth whitening, porcelain crowns and veneers, and fillings using white composite resin. He provides standard dental treatment in the form of cleanings, x-rays, root canals, dental implants, fillings, extractions, and dentures. His patient's comfort is of primary concern and he is experienced with nitrous oxide, numbing medications, IV sedation and a dental laser.

Dr. Keller also enjoys giving back to his community and is the Founder and past Director of the Simi Valley Free Clinic Dental Department.