John Eckman is the CEO of 10up and is the keynote speaker at WordCamp Ann Arbor 2015. 10up is one of the most well known and respected WordPress agencies in the industry. They have 40+ WordPress core contributors on staff and produce great open source WordPress solutions like Varying Vagrant Vagrants (VVV.)
Previously to 10up John was a Managing Director at ISITE Design, a Senior Director at Optaros, Director of Application Development at PixelMEDIA, and held a number of different roles (across front-end development, software engineering, and user experience) at Molecular.
He also blogs at Open Parenthesis on many things related to work: open source, web design, and general internet culture stuff.