John Stefani

John Stefani is the co-founder of Vantier and a Managing Partner at OPCO. With a career rooted in leadership across top-tier financial institutions, John brings deep operational expertise from roles as COO, CIO, and CFO. His experience bridges executive management and hands-on consulting, enabling financial institutions to adapt, transform, and lead in a rapidly evolving landscape.

At Elixirr, John helped scale a consulting business in the U.S. from the ground up, turning it into a major revenue engine. His focus on operating models, emerging technology, digital disruption, and enterprise transformation reflects a forward-thinking mindset that aligns strategy with execution. Over the course of three decades, John has helped shape and scale change within JPMorgan Chase, Citigroup, UBS, and Credit Suisse—consistently bringing clarity, resilience, and innovation to complex financial environments.