Energy Law Project Finance Law
John T. W. Mercer
Awarded Practice Areas
Biography
Since 1978, John Mercer has concentrated his law practice in the areas of project and corporate finance and other complex transactions, with particular emphasis on the electric power industry. John has extensive experience and expertise in project finance, corporate finance and securities offerings, joint ventures and joint ownership arrangements, mergers and acquisitions, and independent power projects. In June 2009, John left his position as the long-time, firm-wide head of the Project Development and Finance Practice Group at a large, international law firm in order to found Mercer Thompson as an innovative, boutique law firm offering the highest quality, top-tier legal services to companies and projects engaged in power sector transactions, including complex financings, joint ownership structures and arrangements, mergers, sales and acquisitions, project development and other transactions. According to the 2011 Edition of Chambers USA America’s Leading Lawyers for Business, quoting in part from comments made by interviewees, “John Mercer is 'an exceptional attorney who is in the highest echelon of legal talent in the country.’ He is ‘highly intelligent, very diligent, creative and easy to work with.’ He is widely regarded as a leading name in the field, particularly in relation to complex finance and project work.”
Overview
- University of Michigan, J.D., graduated 1977
- Georgia, State Bar of Georgia
- Georgia, State Bar of Georgia
- University of Michigan, J.D., graduated 1977
Client Testimonials
Awards & Focus

Named "Lawyer of the Year" by Best Lawyers® for:
- Project Finance Law, Atlanta (2025)
- Energy Law, Atlanta (2020)
- Energy Law, Atlanta (2013)
Recognized in The Best Lawyers in America® 2026 for work in:
- Energy Law
- Project Finance Law
Additional Areas of Practice:
- Corporate Law
- Oil and Gas Law
News & Media
Publications
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