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DJ is an old SAP hacker who has been working with SAP technology for 22 years (good grief!), and has been around the SDN community from the very beginning, playing a part in guiding SAP in forming their first online developer community presence when O'Reilly and SAP got together to build SDN. From the start he contributed weblog posts and technical articles, and pushed SDN and the community hard for online access at SAP events, encouraged blogging & online parallel discussions, and encouraged SDN to look at all sorts of social media mechanisms, this Wiki being one of the results of that. Hurray!
DJ (@qmacro on Twitter) has an online presence at www.pipetree.com/qmacro, where you can find his weblog, CV / Resume and links to other stuff like his LinkedIn profile. He is very proud to have recently been made an SAP Mentor.