Our People


Gary Leaderman

Principal Consultant

Gary Leaderman is a sourcing consultant with over 35 years IT industry experience in international organisations. As a sourcing specialist for 14 years, Gary now has a key role in the EMEA Sourcing Capability team, where he blends practical experience, his knowledge of sourcing best practices, ISG’s FutureSource methodology and his passion for quality and excellence to deliver positive sourcing outcomes for many of ISG’s clients and offers subject matter expertise to colleagues.