In the 2006–07 season, Grünberg/Rand won gold and silver at their two JGP events and qualified for the ISU Junior Grand Prix Final where they placed 5th.

They won the silver medal at the 2007 World Junior Championships, behind Ekaterina Bobrova / Dmitri Soloviev and ahead of Kaitlyn Weaver / Andrew Poje.

Early the following season, Mallory/Rand placed 9th at the 2009 Nebelhorn Trophy, giving Estonia a spot in the ice dancing event at the 2010 Winter Olympics in Vancouver.

They did not compete in Canada because the Olympics, unlike other competitions, required both partners to be citizens of the country they were representing and Estonia did not allow dual nationality, meaning that Mallory would have to renounce her U.S. citizenship.

The two missed the 2010–2011 season due to Rand's compulsory one-year military service but planned to return to competition.