Gerboldt became interested in figure skating at the age of six.[1] Gerboldt denied the assertion that her parents named her "Katarina" in honor of Katarina Witt, and stated that her parents had indeed wanted her to become a sportswoman, but not specifically a figure skater.[1]
After an unsuccessful 2009–10 season, Tatiana Druchinina suggested to Gerboldt that she switch to pair skating.[4] Gerboldt moved back to Saint Petersburg, where coaches Tamara Moskvina and Artur Dmitriev asked her to try out with Alexander Enbert, whom she knew since childhood.[5][4] The new partnership was announced in March 2010.[6]
During the 2010–11 season, Gerboldt/Enbert made their international debut at the 2010 Cup of Nice, which they won. They finished fourth at the 2010 Cup of Russia, their sole 2010-11 Grand Prix event. At the 2011 Russian Nationals, they placed fourth in the short program and fifth in the long, to finish fourth overall. As Tatiana Volosozhar / Maxim Trankov were ineligible to compete at the 2011 European Championships, Gerboldt/Enbert were named in2 the team for the event. They placed fifth in the short program with a new personal best score of 57.50, fourth in the free program, also with a new personal best (112.45), and finished fourth overall with 169.95 points, their best combined total.
In the 2011–12 season, Gerboldt/Enbert competed in one Grand Prix event, the 2011 Cup of Russia. In 2012–13, they were assigned to Skate Canada but withdrew due to injury – Gerboldt tore a ligament.[7] She underwent surgery on August 2 – a week after the injury – and on October 3.[8][9] Coached by Oleg Vasiliev, Gerboldt/Enbert returned to competition in the 2013–14 season but split in April 2014.
On July 12, 2014, it was announced that she had teamed up with French singles skater Brian Joubert.[10] In November 2014, however, Joubert confirmed his competitive retirement.[11]
Gerboldt announced her retirement from competitive figure skating on September 23, 2015, to begin coaching.[12]
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