Catharina joined the Miss Korea Brazil 2013 pageant where she was declared as first runner-up.

Multiple rumors surround her purported dethronement, including third-party pressure and bribery, but none have emerged with evidence.

She was not originally part of the second runners up but the Miss Korea Organization decided to take another place for the 'overseas' candidates.

Based from Miss Earth's website, Catharina's platform for the environment is the cleanup of plastic wastes in the ocean.

During the entire preliminary activities of Miss Earth, Catharina was able to get a silver medal for the "I Love My Planet Schools Campaign".

[citation needed] At the Miss World, she placed in Top 20 and won the Queen of America's title.