Ms. Duffy is a seasoned financial analyst with more than 20 years of experience in the utility sector, specializing in revenue requirement modeling, cost-of-service studies, and regulatory accounting for electric and gas utilities. She has an extensive background in financial planning, budgeting, rate analysis, and regulatory support, providing leadership and technical expertise across all phases of rate proceedings and compliance activities.

Over the course of her career, Ms. Duffy has supported major utilities in the preparation of base rate cases, riders, and commission filings, delivering accurate and defensible models aligned with both regulatory standards and strategic objectives. Her experience spans the full spectrum of revenue requirement and cost-of-service development, including plant and depreciation analysis, O&M and capital budgeting, normalization adjustments, and test-year preparation.

In addition to her modeling expertise, Ms. Duffy is deeply experienced in regulatory strategy and witness support, collaborating with accounting, finance, engineering, and pricing teams to produce comprehensive filings and testimony. She has contributed to successful outcomes in proceedings involving Clean Heat, Wildfire Mitigation, and Transportation Electrification, helping utilities balance cost recovery with evolving policy mandates and customer needs.

Prior to joining Atrium Economics, Ms. Duffy held progressive roles in financial and regulatory departments within the utility industry, where she led projects to improve process efficiency, enhance data governance, and integrate cross-departmental systems for planning and reporting. Her work is recognized for its precision, clarity, and collaborative execution—qualities that have made her a trusted partner to both internal leadership and external stakeholders.

With a reputation for precision, clarity, and collaboration, Ms. Duffy helps utilities align analytical rigor with regulatory expectations. She is a trusted advisor who partners with clients to develop transparent, well-supported filings that withstand scrutiny and advance organizational goals.