[citation needed] In 2010, Vartmann teamed up with Canadian-American skater Aaron Van Cleave to compete for Germany.

[5] The pair made their international debut at the 2010 Warsaw Cup where they won the gold medal.

On 26 January, during the morning practice before the long programs, Vartmann collided with Daniel Wende while they were attempting to avoid a French couple.

[5] Vartmann and Van Cleave withdrew from the 2012 Nebelhorn Trophy following the short program – Vartmann picked into her right foot when she fell on a throw triple loop during the short and was unable to put on her skate the next day due to swelling.

[7] They withdrew from the 2012 Coupe de Nice and their first assigned Grand Prix event, the 2012 Cup of Russia, after Van Cleave sustained a broken cheekbone while catching Vartmann on a triple twist.

[9] The pair was coached by Knut Schubert and Stefan Lindemann in Berlin in the first half of the 2014–15 season.