On the suggestion of her husband, coach and manager Henry Gundling, Beulah took part at the duet competition in synchronized swimming at the Outdoor Nationals in Des Moines in 1948 together with Noreen Fenner and placed 10th.

She won several important competitions in North America, inter alia she took first place at the 1949 Canadian Synchronized Swimming Championships with a routine entitled The Swan after music by Camille Saint-Saëns.

Gundling introduced solo synchronized swimming on an exhibition basis at the 1951 Pan American Games as well as the 1952 Helsinki Olympics, where she presented her program Thunderbird to music from the opera Natoma by Victor Herbert.

[4] After winning the gold medal of the solo event at the 1955 Pan American Games Beulah Gundling finished her sports career.

After winning the gold medal of the solo event at the 1955 Pan American Games Beulah Gundling finished her swimming career presenting compositions at many festivals held by the International Academy of Aquatic Art until she retired in 1991, having been awarded only First Class Honors of the IAAA for all of her works.