Dr. Susan Lewis is a sustainability and decarbonization leader who turns climate ambition into measurable results. She leads the Carbon and Energy Advisory team, overseeing several integrated service areas including: GHG inventories and audit readiness, GHG inventory assurance, decarbonization and emissions reduction roadmaps, facility optimization and energy management, and climate/carbon/energy advisory. Susan brings deep technical expertise across Scope 1, 2, and 3 emissions, energy efficiency, renewables, fleet electrification, and emerging clean technologies; paired with the pragmatic, implementation-first approach that comes from years of building and scaling programs across both public and private sectors.
Her track record includes standing up a state-level energy program that doubled solar capacity and cut energy use by 30%, launching a nationwide energy audit and efficiency program across hundreds of facilities, developing science-based target plans and decarbonization roadmaps for Fortune 500 enterprises, and leading the effort to achieve the world's first LEED-certified theme park. Across these experiences, Susan has developed the rare ability to move seamlessly between high-level strategy and hands-on execution, translating complex climate challenges into clear, actionable plans that withstand scrutiny.
Known for building strong cross-functional partnerships and motivating teams toward ambitious sustainability goals, Susan helps clients integrate ESG and emissions reduction into core decision-making. She brings clarity, credibility, and momentum to every engagement, helping organizations turn climate commitments into credible, executable progress.
