Behagen became an agent and a wholesaler in 1760 and was also active in Kurantbanken where he held several trusted posts. In 1764, he obtained a royal licence to establish a sugar refinery at his house in Strandgade. In 1769, he became a member of the board of directors of the DanishAsia Company. When the octroi was up for renewal in 1772, many stakeholdersexpressed their dissatisfaction with the management and a new board was elected.