Aumont was admitted to the Royal Danish Academy of Fine Arts in 1820 where he studied portrait painting under Hans Hansen and C. W. Eckersberg.

He unsuccessfully tried to obtain a stipend from the academy to continue his education in Paris but his plans were instead realized with economic support from Prince Christian Frederik and A. W. Moltke.

The works that he sent home were well received, for instance by Niels Laurits Høyen, so that he could finally obtain the approval from the academy needed to get a government stipend.

[2] After his return to Copenhagen in 1829, he immediately made a name for himself as a celebrated portrait painter and received a number of commissions from the royal court.

The next year, when he made another attempt, this time with a portrait of Johanne Louise Heibergs, he was again rejected.