Mary Yang brings deep expertise in transmission planning, generator interconnection, wholesale market design and rates to her role as chief operating officer at 804 Advisory. In this capacity, she supports commercial strategy, policy development and regulatory engagement for investors, developers and other energy stakeholders.  

In addition to 804 Advisory, Mary is the founder and owner of the law firm Juni PLLC where she marries her extensive legal background with her power sector expertise. Mary previously served as counsel at Wright & Talisman where she advised regional transmission organizations, independent system operators, and transmission owners in proceedings before the Federal Energy Regulatory Commission (FERC). Her work focused on emerging issues in PJM Interconnection L.L.C. (PJM), including co-located load and large load interconnection.

From 2022-2024, Mary was a legal advisor to FERC Commissioner Allison Clements. She contributed to major transmission and interconnection reforms, including Order Nos. 1920 and 2023, and advised on a range of market design and policy matters. She was also detailed to the U.S. Department of Energy (DOE) through the end of the Biden Administration, supporting implementation of federal energy programs under the Inflation Reduction Act and Infrastructure Investment and Jobs Act.

Earlier in her career, Mary was a trial attorney at FERC, litigating complex electric, gas, and oil rate cases. She began her career as an associate at Covington & Burling LLP.

Mary is active in the Energy Bar Association. She serves on the editorial board of the Energy Law Journal and is a board member of both the Foundation for the Energy Law Journal and the Charitable Foundation for the Energy Bar Association. Mary has been recognized as a Rising Star by both the Energy Bar Association and the Women’s Energy Summit.