GRAPH Leadership

GRAPH is led by Mark Stein, James Tetherton and Jeff Merkle. Mark, James and Jeff are experienced strategy consulting professionals, who have partnered together over the past 10+ years to jointly serve their clients.

The founders created GRAPH as a true boutique, to meet the needs of the most demanding private equity and corporate leaders. We are committed to building a firm that is genuinely best-in-class – driven by innovation, intellectual capital, and continuous improvement – and deeply trusted by its clients, partners and team members.

Jeff Merkle, Senior Partner

Jeff Merkle, Senior Partner   |   Profile

Mark Stein, Senior Partner

Mark Stein, Senior Partner   |   Profile

James Tetherton, Senior Partner

James Tetherton, Senior Partner   |   Profile

Nicole Zehfuss, COO

Nicole Zehfuss, COO   |   Profile

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