Business career Walker started a banking and investment firm named
G.H. Walker & Co. in 1900. His family had developed many international banking contacts, and he helped organize the
1904 St. Louis World's Fair. Walker was known as the power behind the local
Democratic Party. In 1920, Walker became the President of the
W.A. Harriman & Co. investment firm, and quickly arranged the credits that
W. Averell Harriman needed to take control of the
Hamburg-Amerika Line. Walker also organized the American Ship and Commerce Corp. to be subsidiary of the W.A. Harriman & Co., with contractual power over the affairs of the Hamburg-Amerika.
W.A. Harriman & Co. (renamed
Harriman Brothers & Company in 1927) well-positioned for this enterprise and rich in assets from their German and Russian business, merged with the British-American investment house
Brown Bros. & Co. on January 1, 1931. Walker retired to his own
G.H. Walker & Co. This left the Harriman brothers, his son-in-law
Prescott Bush and Thatcher M. Brown as senior partners of the new firm of
Brown Brothers Harriman & Co. The firm's London branch continued operating under its historic name
Brown, Shipley & Co. Walker was a director of the W.A. Harriman & Company; Harriman Fifteen,
American International Corporation; Georgian Manganese Corporation; Barnsdall Corporation; American Ship & Commerce Corporation;
Union Banking Corporation; G.H. Walker & Company;
Missouri Pacific Railroad; Laclede Gas and the New Orleans, Texas and Mexico Railroad.
Golf and horse racing In addition to his business concerns, Walker was also a golf enthusiast and a President of the
United States Golf Association (USGA). The USGA's
Walker Cup (the famous biennial golf match) acquired Walker's namesake for his role in the event's creation. He also coheaded the syndicate, (with
W. Averell Harriman), which rebuilt the famed sports venue of
Madison Square Garden and the
Belmont Race Track, 1925. ==Personal life==