Meet the team
Staff
Thomas Harper
Founder
Thomas Harper
Founder
About
Tom loved cars all of his life, and channeled it into the creation of Harper Auto Square, which encompassed 7 dealerships, 13 franchises, a body shop, and more classic cars than Tom would likely admit to. Tom served as president of the Porsche and Audi Dealer Councils throughout the 1980's and 90's. Silent in his constant generosity, Tom loved to help people, especially those in recovery, and was so forgiving of failures. He created a culture at the dealerships that honored relationships above all else, and treated his employees as he did his family, with love and respect. He constantly preached honesty, hard work, and doing the right thing would lead to success. Success was earned not given. He always sought the good in people and would give second, third, fourth, fifth, chances to people in his life. That culture of genuine care stands to this day and will be his legacy. His servant leadership stands as the example to all of the employees at Harper Auto Square. He touched the lives of so many people and never sought an ounce of credit. Tom will be remembered for his mastery of April Fools jokes, love of Eric Clapton, his friendship with Bill W., and his great big smile that lit up the room.
Shannon Harper
Dealer Principal
Shannon Harper
Dealer Principal
About
Shannon started at the dealerships washing cars and has worked in every possible position in the dealerships. He has the same commitment to creating long term enthusiastic customers as his father, Tom. Shannon is very active in the community as a member of Nucleus Knoxville, involved with East TN Boys and Girls Club and United Way, and on the board of Junior Achievement of East Tennessee and the Dogwood Arts Festival. Harper is a proud sponsor of Ruthie's Fund, Knoxville Opera, and the Great Smoky Mountains Tremont Foundation. He has also received an Automotive News 40 under 40 award and is an Introduction Knoxville alumnus.
Ray Gardner
General Manager
Ray Gardner
General Manager
About
Ray has been with the Harper family of dealerships since 1991. In his free time he enjoys cycling, hiking, trail running, camping, and motorcycling with his wife and two sons.
Ryan Hummel
General Sales Manager
Ryan Hummel
General Sales Manager
About
Raised in Knoxville, Ryan studied Business and Finance at the University of Miami. After graduation, he worked for Land Rover in South Florida for 8 years and eventually realized that he wanted to call Knoxville home again. Reach out to Ryan anytime regarding your Porsche needs. He is always eager to assist our customers.
Andy Dean
Sales Manager/ Brand Ambassador
Andy Dean
Sales Manager/ Brand Ambassador
About
Andy Dean was born into the car business as his grandfather was a dealer principal for many years. The torch was passed down, and Andy has been with the Harper family since 2009. His experience and unflappable nature have been invaluable to the Harper family of dealerships. Andy enjoys spending time with his wife and son in his time away from work.
Ben Proffitt
Dealer Customer Experience Manager/Porsche Pro
Ben Proffitt
Dealer Customer Experience Manager/Porsche Pro
About
Ben joined the Harper Porsche Team in 2025
Jennifer Collins
Finance Manager
Jennifer Collins
Finance Manager
About
Jennifer has been in the automotive industry for over 15 years and is a huge asset to the Harper family. In her spare time she can be found petting her dogs, or at the lake with family and friends.
Lori Christian
Finance Manager
Lori Christian
Finance Manager
About
Lori joined the Harper Porsche Team in 2024
Mark Nagle
Service Manager
Mark Nagle
Service Manager
About
Mark has been with the Harper family of dealerships since 1997. In his spare time he enjoys hiking / camping with his family and is an avid sports fan.
Stephen Ashworth
Assistant Service Manager
Stephen Ashworth
Assistant Service Manager
About
Stephen has been with Harper since May 2016. In his spare time, he enjoys spending time with his family and doing bunny hops on his mountain bike in the woods.
Joey Collins
Sales Brand Ambassador
Joey Collins
Sales Brand Ambassador
About
Joey has been with the Harper family since 1982. He has a laundry list of hobbies including: cycling, all motor sports, and a slalom and trick water skier. He is an avid Moto GP fan and an ADV rider. Joey is a Sales Excellence Award winner for 2014, making him one of the top 100 sales specialists in the world!
Derek Bonzagni
Sales Brand Ambassador
Derek Bonzagni
Sales Brand Ambassador
About
Derek has worked for the Harper family of dealerships since 2014. He moved here from Denver, CO with his wife and daughter and has worked with many highline brands; Ferrari, Maserati, BMW, Audi, etc. He now calls Knoxville home and takes full advantage of the outdoor activities this area has to offer.
Trey Clayman
Sales Brand Ambassador
Trey Clayman
Sales Brand Ambassador
About
Trey brings an energetic attitude to the Harper Dealerships, and we are excited he is here! In his spare time, he enjoys playing golf, camping, and spending time with his wife and 3 daughters.
Jack Slagle
Sales Brand Ambassador / Porsche Pro
Jack Slagle
Sales Brand Ambassador / Porsche Pro
About
Jack brings an amazing attitude to the Harper Porsche family and is always willing to jump in and lend a hand. When he is not at work, he can be found enjoying time with his daughter or kicking up roost in the East TN hills on his Mountain Bike.
Chandler Campbell
Sales Brand Ambassador
Chandler Campbell
Sales Brand Ambassador
About
Raised on such road courses as AMP and Road Atlanta, Chandler has the background and knowledge keep you in tune with your Porsche. In his spare time, he enjoys running marathons, Ultramarathon trail races (ex. the Barkley), and mountain biking the local East TN trails.
Nick Dockery
Service Brand Ambassador
Nick Dockery
Service Brand Ambassador
About
Nick has been with the Harper Family since 2011. He comes from a Service background and knows cars inside and out. His passion for the Porsche brand is strong and his passion for our customers is even stronger. In his spare time, he enjoys playing the guitar and writing songs with his wife and daughters.
Ray Goepfrich
Service Brand Ambassador
Ray Goepfrich
Service Brand Ambassador
About
Ray enjoys chasing golf balls in his spare time and has been with the Harper Group since 2015.
Frank Tyrrell
Service Brand Advisor
Frank Tyrrell
Service Brand Advisor
About
Frank enjoys working on cars in his spare time, and has been a Shop Foreman in the past. He has the knowledge and background to guide you through your Service needs, whatever they may be.
John Duckett
Parts Sales
John Duckett
Parts Sales
About
John is right at home with the Harper dealership family and his personality and work ethic are huge assets to Harper Porsche. In his spare time he enjoys drawing (he is a phenomenal artist) and spending time with his family.
Nick Milligan
Parts Manager
Nick Milligan
Parts Manager
About
Nick has been with Harper Porsche since 1997. He is very passionate about the Porsche brand, and it shows in his enthusiasm. Outside of work, Nick loves spending time with his family at the lake and tuning on racing go-karts.
Logan Field
Parts Sales
Logan Field
Parts Sales
About
When Logan isn't helping customers at the Parts counter, he can be found drifting sideways in his Firebird Trans-Am in Formula Drift events throughout the Southeast.
Brandon Field
Parts Sales
Brandon Field
Parts Sales
About
Brandon joined the Harper Porsche team in 2022
Alison Chittum
Business Manager
Alison Chittum
Business Manager
About
Alison has been with the Harper family of dealerships since 2000 and has proven herself invaluable. In her spare time she enjoys traveling to ball games with her husband and two children, and camping when weather permits.
Kinsley Vincent
Accounting
Kinsley Vincent
Accounting
About
Kinsley joined the Harper Porsche Team with an amazing attitude, and with a Degree in Communications she is a huge asset to the organization. In her spare time Kinsley enjoys playing golf, a continuation of her career as a collegiate athlete.
Donna Doane
Title Clerk
Donna Doane
Title Clerk
About
Donna joined the Harper Porsche Team in 2025
Todd Gibson
Shop Foreman
Todd Gibson
Shop Foreman
About
Todd joined the Harper Porsche Team in 2016