Willis Geffert



Washington, DC
Tel: +1 202 466 9293
Fax: +1 202 466 3605

Email: willis.geffert@nera.com
vCard: Download


MS in physics, University of Pennsylvania
BA in physics, magna cum laude, Amherst College


Willis Geffert specializes in the energy industry, focusing on international arbitration, litigation support, regulatory proceedings, and advisory services. He has provided in-depth analysis and advice as a testifying or consulting expert in 14 international arbitrations, addressing contract disputes, infrastructure concessions, regulatory policy, expropriation, valuation, and damages. Mr. Geffert advises governments, regulators, utilities, energy companies, and investors on energy market design, regulation, potential acquisitions or asset retirements, contract negotiation, and transaction due diligence.

Mr. Geffert has broad power industry experience. He advises clients in the US, Canada, Latin America, Europe, Asia, and Africa, analyzing power plants, transmission and distribution lines, fuel markets, price forecasts, production cost models, Power Purchase Agreements (PPAs), capacity auctions, and wholesale and retail rates. Mr. Geffert’s experience spans all generation technologies, including renewables (solar PV, wind, hydroelectric, geothermal, and biomass) and thermal plants (natural gas, coal, oil, and nuclear), across numerous markets, including PJM, NYISO, CAISO, MISO, ERCOT, ISO-NE, Mexico, various Canadian markets, Ireland's SEM, Nord Pool, Russia, Pakistan, South Africa, Peru, Guatemala, and the Dominican Republic. Increasingly, his cases involve the transition from higher-emission resources like coal power plants to renewable generation. In the oil and gas sector, Mr. Geffert has worked on construction disputes, contract issues related to gas extraction, utility valuation, and retail pricing.

Mr. Geffert has supported clients in arbitrations (including before ICSID, ICC, and SIAC), disputes in US courts, and contested proceedings before the Federal Energy Regulatory Commission (FERC) and state and provincial regulatory bodies. He recently served as expert in an ICC arbitration for a Central American energy company, providing economic and energy sector analysis in a contract and construction-delay dispute related to a hydroelectric power plant.

In his regulatory work, Mr. Geffert frequently assesses retail tariffs and compensation for owning transmission and distribution assets. He also analyzes competition and market power potential. He helps run NERA’s Marginal Cost Working Group.

Title Type Author
Could Mexico’s Capacity Market Design Lead to Gaming by Generators? Published Article Kurt G. Strunk and Willis Geffert
NERA Electricity Insights | Q4 2017 Report Scott J. Bloomberg
NERA Electricity Insights | Q3 2017 Report Scott J. Bloomberg
An Economic Assessment of Contracts in International Arbitration Published Article Willis Geffert et al.
Beyond net metering: A model for pricing services provided by and to distributed gene... Published Article Kurt G. Strunk and Willis Geffert
Getting Ready for Competition in Japan: Lessons Learned from Abroad Published Article Sean Gammons, Willis Geffert, et al.
Title Date Type
NERA Economic Consulting Announces Associate Director Promotions 05 August 2019 Press Release