Most of Hajek's gallery and art exhibitions are premiered in the city where he primarily works, Berlin. In 2004 Hajek had first Group Exhibition at NOTANGO, Berlin. In 2006 Hajek had his second Berlin show, as an Illustrative Preview at the Galerie Johanssen. He opened three shows in 2007. He opened at the Illustrative 07 in Berlin, and then Paris, as well as being featured in the Group Exhibition BBAX07 in Buenos Aires. His work was featured in more Berlin shows in 2008 and 2009, and once again at the Galerie Johanssen and Illustrative 09 for his Maskerade exhibition. His most recent exhibitions were his Maskerade exhibition at the Marci Wood Gallery in Atlanta, Georgia and the Whatiftheworld Gallery in Cape Town, South Africa in 2011.http://www.johanssen-gallery.com/gallery-artists/painting-drawing/olaf-hajek/
