After graduating, he worked for two years with the French chef Daniel Letz at Sankt Jakobs Plads in Østerbro.

[2] Here he got a job at the restaurant Bagatelle, before two years later becoming deputy manager at Le Canard, which at this time had one star in the Michelin guide.

From 2005 to 2006, Holmboe Bang was briefly back in Copenhagen when he was hired as a dessert chef at Jan Hurtigkarl & Co.

In 2007, he returned to Oslo when he became deputy manager at the one-star Restaurant Oro, before from 2008 to 2010 he had a similar position at Feinschmecker, which also had one star in the Michelin guide.

[citation needed] When Esben, together with Finnish sommelier Pontus Dahlström and John Frede wanted to make gourmet food from 100 percent organic local ingredients, they opened the restaurant Maaemo in December 2010, in Oslo's poor Grønland district in the eastern part of the city.