Jens was Creative Director and Managing Partner at Duval Guillaume Brussels as from '99. By the end of 2004 he founded Mortierbrigade with 3 partners in crime. A new school independent agency in the heart of Europe.

Mortierbrigade was elected Agency of the Year in 2005, 2006 and 2008 (Media Marketing), and featured in the top 10 of most innovative agencies in the world of 2008 (Stratégies) and 2009 (Cannes Report). They work for clients like Studio Brussels, Radio 1, Deutsche Bank, Mobistar, Humo Magazine, Saab, Gerolsteiner, and many more. Their campaign 'black boy wanting water' was one of the most awarded campaigns worldwide in 2008.

Jens has won several awards including Titanium and 20 other Cannes Lions, Pencils at The One Show, Eurobest Agency of the Year, LIA, D&AD, Clio, and many others.
He is also President of the Creative Club of Belgium.