At Beaux Arts Institute of Design (BAID) Roy King studied drawing and sculpting from a number of fine artists, Lee Lawrie, C. Paul Jennewein, Ulric Ellerhusen, and Edward McCartan among others.

1927 – Design and modeling the Lotus Shaft Fountain in the Los Angeles (Central) Public Library Children’s Court as commissioned by Lee Lawrie.

1933 – Design and modeling for panels in the United States Solicitor General's Office and Four Winds Reliefs for the Department of Justice Building assisting Sculptor C. Paul Jennewein.

1935 – Won the Public Works of Art Project design competition for the Cadet Mess, Washington Hall, West Point, New York.

1935 – Designed, modeled and carved a bust in Greek pentelic marble of General Alexander S. Webb of College of the City of New York for the school.

1938 – Won and completed a sculptural award for his design of “Old Salt” or "The Sailor" which was displayed under the Norwegian flag in the Court of Nations and for his figure of "Aviation" at the entrance to Iceland Building.

1939-1940 Roy King’s “Horse and Rider”, very powerfully carved in 1939 in native Hawaiian monkey pod wood (or perhaps koa or Ohia).

1940 – Designed, modeled and carved US Marine Emblem 3'x3' monkey pod wood for Camp Catlin Entrance, Pearl Harbor, Hawaii.

1941 – Designed, modeled and carved the seal over the entrance for Architect Val Ossipoff's Outrigger Canoe Club just below Diamond Head, Hawaii in Waikiki.

“IN HONOR OF ALL AMERICANS OF HAWAII WHO DIED IN THIS WORLD WAR, THAT THE BEAUTY AND FREEDOM OF OUR LAND MIGHT BE PRESERVED FOR ALL HUMANITY.” 1945 – Awarded the commission from architect Charles William Dickey (1871–1942) to design, model and carve a second War Memorial, this time out of Vermont Danby Imperial white marble for Kalakaua Park in Hilo on the Island of Hawaiʻi.

The back is inscribed with “That their spirit may guide us to an ever living peace among all mankind.” 1946 – Commissioned to design, model and carve local foliage and plants in the 12 capitals of the columns for the nave interior of Episcopal St. Andrew’s Cathedral, Queen Emma Square, Honolulu.

1946 – Commissioned to design, model and carve candelabra and design, model and create a long series of cast-stone pot planters, produced in pairs, which graduated in size from about a foot high to an enormous pair about as tall as a man and weighing hundreds of pounds for the Catholic Cathedral in central Honolulu.

1947 – Commissioned to design, model and execute sculpture and decorations for McInerny's Ltd. Department Store located at Fort and King Streets in Honolulu.

The motto “Ua Mau Ke Eao Kaaina Ika Pono” “The life of the land is preserved in righteousness” in Honolulu, Hawaii.

His last work was with General Services Administration in Boston as Construction Management Engineer with projects of million dollar post offices and federal buildings.