Oscar Duckworth has personally placed nearly two hundred thousand cubic yards of Wet-mix Shotcrete. This is an accomplishment that few people have ever attained. His contribution to the industry as a technical consultant, author, dedicated committee member, educator, and an ACI Appointed Shotcrete Examiner, firmly places Mr. Duckworth in an elite group of industry leaders.
Knowledge can be gathered in many ways. Knowledge gained from this level of actual hands-on experience is of immense value to anyone requiring technical insight regarding pneumatically applied Shotcrete.

Mr. Duckworth is recognized by his industry peers as a master nozzleman with a strong work ethic. Duckworth continues to travel extensively, acting as lead nozzleman on a variety of technically challenging projects.