During World War I and the expansion of the industrial economy, she continued her career as a secretary in a Toronto mining broker's office.

[5] Gibb was an active member in many Toronto sports clubs, where she played tennis, basketball, softball, and track and field.

[6] In the winter months of the 1920s, she played as left guard for a basketball team called the Toronto Ladies' Maple Leafs.

[12] A few years later, Gibb was elected vice president of the Canadian Amateur Basketball Association in 1922, where she was the only female on the executive council.

[11] In 1925, the Amateur Athletic Union of Canada (AAUC) asked Gibb to hold tryouts for the Canadian women's track and field team, who were to compete in England that summer.

[14] After seeing the British AAU, Gibb and her team were determined to create a national women's sport organization with branches in all provinces.

[16] Gibb explained in her daily column, "No Man's Land of Sport", that this was "visioned by the Canadian girls' team of 1925 on returning from England.

Gibb was chosen to draft a constitution for the newly established union with other committee members such as Janet Allen and Marie Parks.

[26] Gib also lobbied for equality in sports through her journalism career, which began in 1925 with an article about her trip to England with the Canadian Ladies' team.

[28] During the late 1920s, there was a lack of female journalists, and Gibb "set the example for the others to follow, becoming what later commentators called the 'dean of women sportswriters.

[30] she discussed the inequality in access to sports facilities as she states, "'from bantams to seniors, the boys get the preference in rinks throughout the province.

Examples of articles from this series are "Trade Mothers' Milk For Cows in Soviet to Help Weak Babies" and "Toll of Famine Years is Stamped on Faces of Russians Over 25," which were both featured on the front page of the Toronto Daily Star in 1935.

Her nemesis, Andy Lytle, had requested that Alex stop writing her daily column prior to him becoming sports editor.

;[37][38] A few years later in 1954, Gibb persuaded Marilyn Bell to challenge an American swimmer, Florence Chadwick, to swim across Lake Ontario.

"[39] As Gibb's role continuously changed, she wrote another daily column in 1956 entitled "Have You Heard," that included news and gossip of local interest.

[40] On December 16, an article was written in the Toronto Daily Star that stated, "Alexandrine Gibb was first and foremost a real newspaper woman.