[3] He worked at Mount Anthony in Bennington, Vermont until the end of 1900, when he returned to Scotland to marry and take up the post of General Manager at Huntecombe, his brother Willie's enterprise in Oxfordshire.

[citation needed] By 1903, Park went to Argentina where golf was not new, there were already six courses and an amateur championship had been contested since 1895, and served as a professional.

He won the country's first Argentine Open in 1905, a feat he repeated in 1907 and 1912, and laid out a course in Buenos Aires at San Andrés, in 1907.

In February 1915, he enlisted in the Royal Army Medical Corps and served as a private with the 73rd Field Ambulance in France until his discharge in May 1919.

After the war, he returned to Argentina and again to the United States in 1923 to complete the work done by Willie, now in failing health, at St Johnsbury Country Club in Vermont.

Although he spent that winter, and the next, in Argentina, Mungo remained in the United States until 1936 with spells as professional at rather eccentric resorts, including the Victorian castle run on Quaker principles at Lake Mohonk, New York, and the Castle Hot Springs resort in Arizona.