Brandon Kuppersmith – Owner

Brandon began his work in the industry back in 2005 when K & K Tool & Die purchased a brand new Omax Jet Machining Center. Now with 10 years experience programming & operating the Waterjet, there is little he doesn’t know when it comes to waterjet cutting.


Steve Knecht – Owner

Steve has been in the Central Illinois machining industry for over 25 years. He started his career at a production shop while getting his Bachelor’s degree in Industrial Technology-Manufacturing from Illinois State University. Since then he has worked at welding shops, tool and die companies, and engineering firms.

His mechanical abilities are also used in his hobbies of vintage motorcycles and gunsmithing.

His journey from production associate, project manager, and shop manager finally led him to become co-owner of G3 Machining.


Rob Sherman – General Machining Supervisor


Chad Keefe – Fabrication Supervisor

Chad’s exposure to machining and fabrication began long before his professional career, being a third generation toolmaker/fabricator.

Chad’s working career started in the early 1990’s at a local Tool & Die shop where he learned what it takes to be a toolmaker in a machine shop. Since then he has worked in two other machine shops as a machinist and two factories where he performed mechanical and electrical maintenance, before landing at G3 Machining.