Prior to 2013, Greg served as principal investigator on many large scale evaluations and research studies. Many studies are not in the public domain. The public versions of federal evaluation reports rarely designate the contracting department as the author, but the content typically rested entirely on the work completed by consultants. These are selected evaluation reports that have survived the many departmental realignments. In all cases, Gregory Mason served as the principle investigator and lead author of the PRA reports, underlying these studies.