Dr. Fintelmann grew up in Southern Germany hiking with his family of six. After completing his medical training at the University of Ulm in Germany, he travelled to the United States for his Ophthalmology residency, which he accomplished at the prestigious Wills Eye Institute in Philadelphia, Pennsylvania. He stayed for a Corneal and Refractive Surgery Fellowship at the Francis I. Proctor Foundation at the University of California at San Francisco (UCSF) and has since come to join Barnet Dulaney Perkins Eye Center.

Dr. Fintelmann is a board certified Ophthalmologist by the American Board of Ophthalmology and a fellow of the American Academy of Ophthalmology. He provides excellence in care of corneal disease, as well as cataract and vision correction surgery. Procedures he performs include corneal transplants, partial thickness corneal transplants (DSAEK), and laser surgery to implant intracorneal segments for keratoconus (Intacs).

Dr. Fintelmann is an appointed Clinical Assistant Professor at the University of Arizona and continues to teach residents from the Wills Eye Institute. He has presented at national and international meetings and has published multiple peer-reviewed articles. Dr. Fintelmann speaks fluent German, English, Spanish, and French. In addition, Dr. Fintelmann has enjoyed using his language and ophthalmological talents in other countries such as Peru, to where he has traveled with Orbis, an organization which aims to provide accessible and sustainable eyecare internationally.