[4] Vermeer won the gold medal in the women's 63 kg event at the 2015 World Judo Cadets Championships held in Sarajevo, Bosnia and Herzegovina.

A year later, Vermeer lost her bronze medal match in the women's 63 kg event at the 2019 World Judo Championships held in Tokyo, Japan.

[5][6] A few months later, she won one of the bronze medals in the women's 63 kg event at the 2021 European Judo Championships held in Lisbon, Portugal.

[7][8] Vermeer was not selected as one of the judoka to represent the Netherlands at the 2020 Summer Olympics in Tokyo, Japan which turned her year's focus to the 2021 World Judo Championships in Budapest, Hungary.

[9] She reached the semi-finals in the women's 63 kg event where she lost against the eventual gold medalist Clarisse Agbegnenou of France.