Regulatory Services

Roger Garratt supports our Regulatory and Generation practices as an experienced utility executive focusing on the development and acquisition of major energy infrastructure projects. He specializes in power generation and development, regulatory strategy, asset acquisition and PPA negotiation. He has provided expert testimony in several utility proceedings as a utility executive. Roger has a B.S. in Electrical Engineering from the University of Nebraska-Lincoln and an M.B.A. in International Marketing from Union College.

Jim Seibert supports multiple practice areas with a 25-year career advising clients in the global energy and utilities industries. His experience with electric, gas, steam, and water utilities on 4 continents has spanned power production, T&D, customer service, and corporate support services. He is a frequent speaker and noted author whose industry views are published in Public Utilities Fortnightly, The Wall Street Journal, Pipeline and Gas Journal, and World Energy and has presented testimony in multiple U.S. and international regulatory proceedings. He has a B.S. in Industrial & Systems Engineering from The Ohio State University, an M.B.A. from the University of Chicago, and is a Certified Public Accountant (CPA).

Jeff Cummings supports multiple practice areas with over 30 years of management consulting experience. He has an extensive background in engineering, strategic, and operational planning for utilities in North America and Asia. He has recently focused on T&D network modernization, electric system cost and service level performance through comparative analyses (benchmarking), and the integration of best practices, project and portfolio management, reliability and risk mitigation, capital investment prioritization, and asset risk strategy. He earned an M.S. in Operations Research from the U.S. Naval Postgraduate School and a B.S. from the U.S. Naval Academy at Annapolis, Maryland.

Isamar Amador Diaz, EIT serves our Regulatory practice with a focus on energy planning and renewable supply. She has a M.S. in Agricultural & Biological Engineering from The Pennsylvania State University and both a B.S. in Mechanical Engineering and a B.A. in Economics from the University of Puerto Rico, Mayagüez

Eric Markell serves multiple practice areas with over 35 years of experience as a senior executive in the utility and independent energy industries. In his career, he has held executive positions for corporate finance, energy supply, regulatory relations and ratemaking, asset acquisition, and related litigation and arbitration processes. He has extensive testimony experience as a utility executive in regulatory proceedings. He has a B.A. in Economics from Union College and an M.P.A. from Syracuse University.

Brian Walshe supports our Regulatory and Generation practices with over 30 years of experience across a wide range of areas within the energy and utility industries. He has primarily focused on regulatory policy, resource planning and asset acquisition, electric wholesale market evaluations, and renewable energy strategies. He has provided services to over 300 power plants of all technologies in 11 countries and provided expert witness testimony in several jurisdictions. He has a B.S. in Civil Engineering from Northeastern University, and an M.B.A., with concentration in Finance from the University of Michigan.