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Our site www.alphameasure.com has been online since 2005 and currently has a page rank of 4. The site has always ranked on page one or two of Google for our primary keywords (Employee Satisfaction Survey, Employee Engagement Survey, Employee Surveys). I'm not sure exactly when it happened, but now our site is nowhere to be found.  I'm thinking our ranking dropped somewhere in mid to late January? We did use an SEO company in the spring of 2012 that went on a link building campaign for us.  They added about 450 inbound links over a three month period.  Other than that - nothing has really change on the site. We're getting ready to release a new version of our software that was being re-written during all of 2012, so the timing of losing our rankings is just awful. Any help or ideas is greatly appreciated? Thanks in advance,
Josh