Mr. Richardson and his company AA Machining & Welding, Inc. built the first major ski resort zip line at Park City Mountain Resort in 2002 know known as Zip-Rider. He is the owner of Momentum Engineering, LLC. Momentum Engineering, LLC has designed a handheld passive braking zipline trolley and barrel spring systems. Momentum Engineering develops in zip line systems, tower design, site-inspection, zipline trolley safety, product development, 3rd-party training, and Emergency Arrest Devices (EADs).

His first company, AA Machining & Welding, Inc. began in 1995. The company was involved in steel construction, national board certified welding, machine tooling, product development, and building amusement rides. His business became a Nation Board Certified in welding, and he gained a Steel Erection Contractors license. One of his accomplishments came when Park City Mountain Resort Zipline now known as ZipRider. AA Machining & Welding built the largest zipline of the day in 2002. He later gained his first United States patent in 2003.

In 2009 he designed, build, trained personnel and operated a zipline in Spanish Fork, Utah https://www.heraldextra.com/news/local/south/elk-ridge/elk-ridge-resident-finds-peace-in-creating-new-things/article_10c0ba70-9a48-50fb-8b6b-87b56e5deae8.html.

He was first contacted in 2010  as an expert witness  candidate in a zip line accident in Reno, Nevada. 

He has three United States patents for the passive braking trolleys and zip line braking systems. The first in 2003 https://patents.google.com/patent/US6666773B1/en  The second United States patent issued in 2013 https://patents.google.com/patent/US8424460B2/en  and his third United States patent was granted in 2019. 

Mr. Richardson’s zip line trolleys and braking systems ride on some of the largest zip lines in the world.

Yes We Built the Park City Mountain Resort Zip Ride in 2003 Park City Mountain Resort sent their Employee Erik Cylvic to Cedar to work with the "Zip Doctor"