In 1819, Hambro installed him as agent on Guernsey and Jersey with responsibility for the firm's trade in Brazilian and Danish products on the world market.

[1] In 1825, Hansen was sent to Kristiania to oversee the firm's Security interests in custom duties in connection with a state loan.

Shortly thereafter, he was put in charge of a local branch office which operated under the name Andreas Hansen.

When Gerson died later that same year Hambro wanted Hansen to return to the head office in London.

The complex was later expanded with Denmark's first canned food factory which made it possible to sell the meat to the many ships in the area.

[1][3] Hansen was a member of Grosserer-Societetet's committee from 1829 and succeeded Lauritz Nicolai Hvidt as its president in 1856.

Hansen owned [[Kokkedal Slot Copenhagen |Kokkedal]] from 1837 to 1843 and later Øregård as well as Tirsbæk at Vejle (1861–1873)[5] and Nørre Holmegård at Lemvig (1867–1873).

[6] On 7 July 1825 in St. Andrew's Church on Guernsey, Hansen married Emma Eliza Grut (16 November 1803 – 25 June 1865).

A daughter, Mary Lucinde Hansen (1835–1915), married Regnar Westenholz of Mattrup Manor.