Gregg Therrien


Market Analysis and Resource Planning:
Demand forecasting, Integrated resource planning

Cost allocation, Cost of service studies (marginal and embedded), Incentive regulation, Prudence and project management reviews, Rate design, Regulatory policy, Regulatory strategy, Revenue requirements

Gregg Therrien

Assistant Vice President

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Summary of Experience

Mr. Therrien is a former utility Director who has held leadership positions at Connecticut Natural Gas Corporation and affiliated companies for more than 19 years. Most recently, he served as the Director, Gas Construction at Connecticut Natural Gas and The Southern Connecticut Gas Company; and Director, Regulatory & Tariffs at UIL Holdings, Inc.

Mr. Therrien’s experience includes regulatory strategies; natural gas growth; infrastructure replacement programs; natural gas distribution system operations and construction practices; integrated resource planning; and technical rate case issues such as utility cost of service, rate design, decoupling, alternative rate plans, capital and cost trackers, pricing, gas cost accounting, gross margin, and load forecasting for regulated utilities. His recent consultancy engagements include market analysis, merger & acquisition due diligence, economic development, tariff development, decoupling expert testimony, rate comparison studies, cost of service studies, revenue requirement analysis, and rate design expert testimony. Mr. Therrien has led a newly-created gas construction organization, leveraging project management practices to plan and executed a $100M annual capital budget. Mr. Therrien has led the preparation, filing, discovery, and implementation of several rate cases and served as the primary rate design witness on rate cases in which he designed the rate structure.

Mr. Therrien has an M.B.A. from the University of Connecticut and a B.S. in Finance from Bryant University, and is also a certified Project Management Professional (PMP).


MBA, Concentration in Finance, University of Connecticut

B.S., Finance, Bryant University

Testified Before

Connecticut Public Utilities Regulatory Committee; Illinois Commerce Commission; Maine Public Utilities Commission; New Hampshire Public Utilities Commission


Impact of U.S. Federal Tax Reform on Regulated Utilities   PDF

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