What we do
Here at Big 3 we are are many things, from a one-stop restoration shop, to a "Speed Shop"that does high performance upgrades, tuning and custom fabrication. We are also ASE certified and very comfortable with working on a wide variety of cars of all makes and models, including cars that many shops can't handle or would rather not deal with.
Meet the Team
Owner and Lead Mechanic/Fabricator
ASE Certified Master Technician
The driving force behind Big 3, Aaron is skilled and experienced in nearly every aspect of automotive performance and restoration. After years of working in high-end shops, Aaron decided it was time venture out on his own and was presented with the opportunity to buy Big 3 Performance in 2011 and take the business in a new direction. Aaron strives to provide results that customers will brag about and give them the proper service that they pay for.
While Aaron is a muscle car guy at heart, he is equally comfortable restoring a 32 Ford, tuning a turbo import, rebuilding a Ferrari V12, building a custom set of twin turbo headers or setting up a nitrous system on a big block chevy.
-Race engine builder
-Dyno certified performance tuning specialist
Dan "Snoopy" Rosinsky has been a Green Bay hotrodder his whole life. After running a speed shop in his youth, Dan moved into industrial fabrication and spent years as a shop foreman and fabricator in food-grade stainless steel equipment production for the local dairy industry. These days Dan is back working on his passion, street rods and hot cars.
Body and Assembly
John joins Big 3 as a body technician after several years or hanging around the shop and knowing Aaron outside of work. He keeps his coworkers in a joyful mood with his heart of gold. John is an avid hunter and takes care of his mother since his father passed away. His current project is a making a pro-street truck out of the Ford Ranger that was handed down to him by his father.
Jesse C. Morris
Jesse Morris grew up in Texas work on cars with his dad. After 11 years and 3 combat tours in Iraq he relocated to Green Bay and eventually ended up joining the Big 3 team in 2018 When he is not acting as Aarons personal body guard he stays busy with engine swaps, minor fabrication, electrical and exhaust work.
Mechanic / Electrical
Jason Treptow joined Big 3 Performance in 2015 after 20 years as an electrician and maintenance mechanic in the manufacturing. He has completed ambitious automotive projects, including multiple complicated stereo installations, engine swaps, wiring jobs, and truck suspension/lift kit installations for himself and others in his spare time. Jason began helping around the shop on a part-time basis, and a short amount of time has proven himself to be a great addition to the team. His electrical and mechanical experience make him a valuable assembler.
Office Manager / Web & Media
John came to us with 40+ years of bodyshop experience under his belt. He had his own shop in West Bend specializing in pre-war and 50's cars for many years, but chose to take an early retirement and move north for family reason. Well, the early retirement got a bit boring and John decided to get back into it and that lead him to the Big 3 team. John is currently working on a 1968 Mustang project.