Through Thirdstage Consulting, Greg is focused on Human Resource operational excellence, leadership development, and people problem solving for small and mid-sized organizations.

Greg’s initial business venture was the founding of Granatt HR, a Human Resources management and consulting firm in 1998, to which he added an employee insurance benefits agency in 2004. In 2006, Granatt HR partnered with Professional Payroll Solutions to form PROXUS LLC, a full-service payroll and human resources management firm. In 2012 he sold his business interest to his long time partner Jeff Green and became Senior Advisor to the firm. He recently stepped down after eight years of service as Chief Human Resources Officer for Sun River Health a 2000 employee federally qualified healthcare (FQHC) organization providing primary healthcare to the under and uninsured population in 50 locations throughout New York State where he continues to serve as a Special Advisor.

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Greg's contributions to the field of Human Resources were recognized by his selection as HR Consultant of the Year in the Philadelphia region. His credentials include Senior Professional in Human Resources (SPHR), a Master’s degree in Human Services from John Carroll University, and a Bachelor’s Degree from the College of Wooster.

Greg is a competitive athlete who was ranked as high as 39th in the world in his age group in Crossfit. In 2024 he qualified for the Triathlon Sprint and Olympic National Championships and finished 20th in his age group.