[3] At age five, she began fencing at her school, then at CS Mangiarotti, where she trained under Nicola Pomarnasky, then Sandro Resegotti.

Aeronautica Militare, the sport section of the Italian Air Force, and moved to Paris to be coached by Daniel Levavasseur, who was training Laura Flessel at the time.

In the 2009 World Championships in Antalya, she was stopped in the round of 32, but in the team event, she conquered Italy's first gold in women's épée along with Bianca Del Carretto, Francesca Quondamcarlo and Cristiana Cascioli.

After the Games, Moellhausen took a break in her sport career and assumed the artistic direction of the 2013 centenary gala of the International Fencing Federation at the Grand Palais in Paris.

[7] She explained that fencing for Brazil, which has no other female épée fencer in the Top 100, allows her to aim for a qualification to the 2016 Summer Olympics in Rio de Janeiro while pursuing a professional career.

[8] She was eliminated in the first round in her two first competitions since the 2012 Olympics, the Barcelona Grand Prix and the Rio World Cup, but she reached the quarterfinals in the Pan American Championships.

In the 2014 World Championships in Kazan, she was knocked out in the first round by Italy's Rossella Fiamingo, who would eventually win the gold medal.

[11] During the 2020 coronavirus pandemic, Moellhausen has conducted virtual fencing training sessions on Instagram that have been promoted by FIE.

It was later revealed Moellhausen had been diagnosed with a benign tumor around her lumbar region, which also was the reason for an emergency hospitalization a few days before the Olympics began that year.

"[15] She runs a fencing-related brand called 5 Touches, which offers lifestyle services in fashion, gastronomy, fitness, home goods, and more.