As chief architect for the Metropolitan Life Insurance Company (New York City), he and his partner designed the Home Office Building at 11 Madison Avenue along with dozens of other commercial, religious, residential and academic structures.
This led to his design of hospitals in Alaska and Puerto Rico as well as schools in the western United States and Cuba.
During World War I, Waid served as deputy director of production and as one of the executives of the organization of architects that designed and built housing structures for some twenty-five shipbuilding yards.
[3] Waid's career reached its pinnacle when he became chief architect for the Metropolitan Life Insurance Company and designed, with his business partner Harvey Wiley Corbett, the Home Office Building at 11 Madison Avenue and now known as the Metropolitan Life North Building.
In stark contrast with his early work, the modern office building would eschew, "extraneous ornament or embellishment which has not a rational meaning and practical use" and that it would be "unhampered by archaeological precedent.
He endowed a fine arts department at Monmouth College in memory of his first wife Eva Clark Waid (January 1869 – June 1929).