[3] Whittemore headed up public relations and industrial development for both railroads and was an officer of several B&M subsidiaries, including the Boston Garden-Arena Corporation, Mount Washington Cog Railway, and Mystic Terminal Company.
[3] He helped organize Boston-Maine Airways and served as its vice president until federal regulations barred railroads from the aviation business.
[10] Under Whittemore's leadership, the papermaker began producing a number of new products, including chloroform and shoe inserts.
He was also a trustee of the Brookings Institution and New Hampshire Historical Society and chairman of the Crotched Mountain Rehabilitation Center.
[2] Whittemore stepped down as president of Brown Company in 1955, but remained chairman until ill health forced his resignation in 1960.
[1][13] A short time later, the University of New Hampshire announced the establishment of the Whittemore School of Business and Economics.