Jackson represented England in the 1954 England–Scotland girls match at West Kilbride and then won the subsequent Girls Amateur Championship, beating Dolores Winsor at the 20th hole of the final. Jackson had holed a 4-yard putt at the 18th hole to take the match to extra holes.[2][3]
In 1955 Jackson made her debut in the Women's Home Internationals at Royal Portrush, and the following week reached the semi-finals of the Ladies' British Open Amateur Championship, losing 3&2 to Jessie Valentine.[4][5] Jackson was selected as part of a British women's team that toured Australia and New Zealand in the second half of 1955. Because many of the senior players were unavailable, the team turned into a team of five juniors, aged between 18 and 21.[6][7] The tour was such a success that the team was awarded the Association of Golf Writers trophy, the first time a team had won the award.[8] Jackson was not included in the 1956 Curtis Cup team, which was announced at the end of March, being selected as first reserve.[9] In August she won the German open championship, beating Jacqueline Gordon 8&7 in the final.[10] The following month she won the English Women's Amateur Championship at Hunstanton, beating Ruth Ferguson 2&1 in the final.[11] In October 1957 she make her debut for a British team, playing against Belgium and then, a few days later, against France in the Vagliano Trophy.[12][13]
In 1964 Jackson reached the semi-finals of the English Women's Amateur Championship at Royal Lytham, losing by one hole to Mary Everard.[25] She was selected for Curtis Cup team at Royal Porthcawl, the first to have two sets of 18-hole matches.[26] She played with Susan Armitage in both sets of the foursomes matches, losing both matches. In the singles she beat Carol Sorenson but lost to Peggy Conley. The contest was much closer than that in 1962 with the teams level at the start of the final round of singles matches.[27][28] Two weeks later Jackson reached the final of the Ladies' British Open Amateur Championship at Prince's, losing to Carol Sorenson at the 37th hole. Jackson had missed a 5-foot putt at the previous hole that would have won the match.[29] She played for England in the 1964 Espirito Santo Trophy, when the four home nations competed separately.[30]
Jackson made her final appearance in the Curtis Cup in 1968 at Royal County Down.[38] She was not selected for either of the foursomes sessions. In the singles she halved her match against Peggy Conley and lost to Phyllis Preuss. The team led after the first day but the United States had the better of the second day and won by three points.[39][40] In three Curtis Cup contests, she won one match, lost six and halved one.
Jackson was also a golf administrator. She was chair of the English Ladies Golf Association in 1971 and President from 1993 to 1995. She was President of the Ladies Golf Union from 1998 to 2001 and became an Honorary Vice-President in 2003.[42] She was the captain and also the selector of a number of British and English teams.[1]