Jack White was one of the original members of the PGA, and in 1902 he was appointed professional at the new Sunningdale course, where he remained for over 25 years. It was from there he entered the 1904 Open at Royal St. George's, which that year attracted 144 competitors, and an extra day was required. The Open started on Wednesday and it took until 7 o'clock in the evening before the first round was completed. Robert Thomson from North Berwick equaled the course record 75, set by Jack White in 1899 and led the championship after the first round. Jack White scored progressively lower rounds-80, 75, 72 and 69-and his aggregate of 296, was the first time the 300 barrier was broken in the event.

During that Open, James Braid was the first player to break 70 when he scored 69 in the third round. However Jack White matched that in the final round to win by one stroke. Braid had to settle for a share of second place with J.H. Taylor, who in the fourth round established a new championship record 68. White received the gold medal and 50 pounds in prize money.

With the national championship's of America and Great Britain in the hands of North Berwick men, this was a golden era for the town with a population of only 2,200. Unfortunately the battle to be 'world champion golfer' did not materialise as Jack White suffered from ill health and could not make the journey. The Sydney Morning Herald in Australia reported that Jack returned to North Berwick to convalesce and visit his parents. His only exercise was confined to playing bowls on the North Berwick green.

In 1905, White was amongst a group of professionals including Willie Anderson, Sandy Herd, Andrew Kirkaldy, Rowland Jones and Tom Vardon who were invited to San Pedro de Los Pinos in Mexico to play a series of exhibition matches. The President of the Mexican Country Club wanted to promote winter golf in the region, and attract the American's over the border.

In December 1905, Jack White sailed the Atlantic from Liverpool on the steamer S.S. Carmania with Ben Nicholls (New York G.C), Alex Herd (Huddersfield) and Rowland Jones (Wimbledon Park). They arrived in New York on 8th January 1906 and took a special train journey to Mexico. The event was won by Willie Smith with Willie Anderson second and Alex Herd third. In February 1906, when the group returned to the USA a number of the British pro's stayed over to play Pinehurst and Palm Beach while Willie Anderson sailed with Jack White back to Scotland.

During Jack White's time at Sunningdale his most famous customer was Bobby Jones. Jack made the driver Bobby Jones used for many years. It was at Sunningdale that Bobby Jones shot 66 in the qualifying round for the Open Championship in 1926. Described as the 'greatest round of golf ever played', Jones had 33 shots and 33 putts. Sunningdale was also the venue for the News of the World Match Play tournament from 1903 and the blue ribbon amateur event - the Golf Illustrated Gold Vase from 1910. At this time White employed six club makers.

Jack White was the nephew of Ben Sayers and Davie Grant, and his brother-in-law, Wilfred Thomson was professional at the Hermitage County Club in Virginia. Walter Travis, the first overseas golfer to win the British Amateur Championship in 1904, co-authored a book with Jack on ' the game within a game' called The Art of Putting. Australian born Walter Travis won the British title using a centre-shafted putter, which was subsequently banned for many years. He also won the U.S. Amateur Championship three times, and was a contemporary of Dorothy Campbell from North Berwick.

At the start of WW1 Jack White enlisted as a private in the London Scottish regiment. His wife continued the business with two young lads helping. Jack had eight club makers, six were conscripted into the army and two went to Woolwich Arsenal.

Norman Hunter, the well known Cambridge University amateur golfer was captain of Sunningdale G.C. at this time. Hunter was a familiar figure at North Berwick playing with Freddie Tait and Harold Hilton. Norman Hunter enlisted in WW1 and was killed at Ypres on 16th June 1915, aged 36 years. He was a Lieutenant in the Royal Warwickshire Regiment.

Maurice Bowyer, a former apprentice at Sunningdale, later said Jack White was sacked in 1926 for 'drinking and womanising' and almost immediately after that event he formed the Jack White Golf Co. and returned to Gullane were he started a club making business in a two storey building (now demolished) in Goose Green Mews. His first apprentice was W. J. 'Bud' Russell, son of Sandie Russell, the starter at Gullane No.1 course. Bud Russell emigrated to Australia in 1930 and was appointed pro at Barwon Heads Golf Club, Victoria where he remained for 57 years. Another apprentice, Hugh Watt became professional at Barnton, before being appointed to Gullane Golf Club. White opened a successful golf equipment shop at 2 Rosebery Place and for many years gave evening class lessons on the art of club making which were very popular.