Mary has extensive experience advising on Regional Transmission Owners and Independent System Operators markets, transmission reform, and ratemaking matters for the Federal Energy Regulatory Commission (FERC).  Most recently, she served as a Legal Advisor to a FERC Commissioner, where she guided initiatives such as Order No. 1920 (regional transmission planning) and Order No. 2023 (generator interconnection), and generic proceedings involving transmission cost management, grid-enhancing technologies, and interregional transmission reform.  In addition, Mary advised on market design and ratemaking cases under the Federal Power Act (FPA) and acted as the Commissioner’s liaison for Congressional and public affairs.

Following her time at FERC, Mary was detailed to the Department of Energy’s (DOE) Office of the General Counsel.  There, she advised DOE leadership on FERC policies and helped implement grant and research programs under the Inflation Reduction Act and the Infrastructure Investment and Jobs Act.  Earlier in her career, Mary served as a Trial Attorney in FERC’s Office of Administrative Litigation.  She litigated and negotiated cases involving electric, gas, and oil rate applications, including matters related to the rate of return on equity (ROE) for electric utilities and contested settlements for natural gas pipeline cost-of-service rates.  Her expertise spans key ratemaking concepts such as tax normalization for Master Limited Partnership pipelines, depreciation of capital assets, ROE, utility accounting, and reactive power.  Mary’s deep understanding of energy law and policy enables her to navigate complex regulatory frameworks and deliver impactful results for her clients.