Partner Alexander S. Leff Alexander S. Leff's practice focuses on renewable energy and infrastructure, project finance and tax, in particular tax equity transactions. Relevant experience Publications & insights ExxonMobil Low Carbon Solutions on its carbon capture and storage agreement with Illinois-based CF Industries to transport and permanently store up to 500,000 metric tons per year of CO2 from CF Industries’ complex in Yazoo City, Mississippi. News and client work View all news and client work featuring Alexander S. Leff One Big Beautiful Bill Act: Impacts on Tax Credits Available for Nuclear Energy Under Sections 45U and 45Y, Energy Law Report, LexisNexis, October 2025. Leff, A., & Burton, D. (2021). Taxation of Proxy Revenue Swaps for Renewable Energy Projects. Tax Notes Federal, 172 (10), 1559–1568. Briefings View more briefings featuring Alexander S. Leff Blog articles View more blog posts featuring Alexander S. Leff Podcasts View more podcasts featuring Alexander S. Leff Contact details Clifford Chance, Houston +17138212804 Email me LinkedIn Speaks English Practice area Environment, Global Financial Markets, PFI PPP, Tax, Construction Sector Energy & resources, Real estate, Private equity Career & qualifications Boston University (BS, magna cum laude) 2008 Boston University School of Law (JD, Honors) 2011 Admitted as an Attorney-at-Law Massachusetts 2011 Admitted as an Attorney-at-Law New York 2012 Joined Clifford Chance as a partner 2022 Boston University School of Law (LL.M., Taxation) 2022 Awards and citations Super Lawyers – New York Metro 2021, Energy and Natural Resources – Rising Stars
