Frank J. Nunlist (8 September 1913 – 15 May 1974) was an American businessman who became chairman of Worthington Corporation, and then of Studebaker-Worthington.

He worked for American Radiator and Standard Sanitary Corporation for eight years before joining L.J.

[3] In 1967 the entrepreneur Derald Ruttenberg organized a merger of Studebaker and Worthington Corporation to form Studebaker-Worthington.

[5] The combined company included the profitable divisions from Studebaker, brake and electrical automobile component manufacturing from Wagner Electric, and diverse operations from Worthington that included manufacture of construction equipment, valves and power generation plant.

[9] In January 1969 the board of directors replaced Nunlist with Derald H. Ruttenberg as president and chief executive officer.

[5] Frank J. Nunlist was nominated by President Nixon as Assistant Postmaster General, Bureau of Operations, with confirmation hearings before the United States Senate Committee on Post Office and Civil Service starting on 25 April 1969.

[11] In an effort to reduce costs, the post office introduced a change to their policy for handling first-class mail that would no longer achieve overnight delivery.