 HOUSTON--BUSINESS WIRE--PROS NYSE: PRO, a provider of SaaS solutions optimizing shopping and selling experiences, today announced it is CertifiedTM by Great Place to Work for the second year in a row. This years designation extends the companys original certification to include all eligible countries: Australia, Bulgaria, France, Germany, United Kingdom and the United States. This prestigious award is based entirely on what current employees say about their experience working at PROS. An 