Developers of the first Pneumatic operated ​Submerged Vehicle Trainer and

Respectful Entry Forcible Entry Door 

Patrick O'Brien  has been a professional firefighter for 22 years serving with two different departments. With a steep background in technical rescue, Pat currently instructs rope and swiftwater rescue and is heavily involved in the development of both disciplines. Pat brings a unique set of skills to Knuckledragger including computer aided design, welding, and fabrication. Pat has invented and developed one of a kind fire service tools and props that continue to help our first responders in their service.

Patrick O'Brien

Jeff Hartjoy

Jeff Hartjoy  brings over 26 years of experience in the welding & metal fabrication business.  Prior to becoming a professional firefighter, Jeff owned two welding and fabrication businesses in the Puget Sound area.  Jeff also drove sprint cars for 10 years and spent 2 seasons racing full time in the Midwest working with some of the best fabricators in the racing industry.  Jeff has an extensive background working with a vast array of different metals and alloys. Jeff is a Swiftwater and Rope Technician and currently serves his community dragging his knuckles around on a Truck.   

Tel: 253-350-5631

P.O. Box 1566  

Buckley, WA, 98321