Born in Canada, Clark’s family moved to Washington state only a month after his birth. Clark would begin his career in aviation during college after obtaining his private pilot license.
In the 1960s, Clark met fellow Enshrinee Clay Lacy of Learjet. Quickly becoming friends, Clark joined Lacy at Learjet, cementing his career in aviation. Clark would go on to open the first Learjet dealership in the Pacific Northwest.
Co-founded Aviation Partners and designed the blended winglet alongside several other designers. The team improved the efficiency of passenger aircraft by impacting sustainability in less fuel consumption, extended aircraft range, and reduced carbon emissions.
Co-founded Horizon Air in 1981, a regional airline in the pacific northwest, and eventually merged into the Alaskan Air Group.
In 2017, Clark and the team at Aviation Partners broke aviation records when their sponsored, highly modified P-51 Mustang broke the piston engine world record at 554 MPH.