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Andrew Walker is a Senior Java Developer at CSG International, a position held since November 2010. Prior to this role, Andrew worked as a Java Developer at S1 Corporation from July 2009 to October 2010 and at CellSmart Technologies from November 2007 to June 2009. Andrew holds a Bachelor of Science degree in Computer Science from the University of London, where studies were completed between 2004 and 2007.