Related Practices

Sidney Villanueva


Business Phone: 503.290.2338
Business Fax: 503.290.2405


Sidney works within the firm’s Energy practice, with a unique specialty in public utility and energy law. She offers clients expertise in a variety of administrative and regulatory matters, including: Bonneville Power Administration (Bonneville) proceedings, Public Utility Regulatory Policies Act (PURPA), transmission access, contract and rate issues.

Before joining Troutman Sanders, Sidney worked as an associate attorney primarily representing independent power producers, PURPA qualifying facilities, and small utility companies before various state utility commissions. Sidney is known for her keen sense of observation and diplomacy.

Sidney has been instrumental in advocating for policy changes in a variety of forums at the state level. She has also represented clients in administrative rule-making proceedings and worked with the state legislature to obtain statutory changes.

Prior to completing her J.D. at Lewis & Clark Law School, Sidney served as the BP-16 Rate Clerk at Bonneville and in a judicial externship for the Honorable Michael H. Simon at the U.S. District Court for the District of Oregon.

Representative Matters
  • Represented independent power producers during utilities’ integrated resource planning proceeding challenging transmission and resource acquisition plans.
  • Represented qualifying facilities during various utility avoided cost rate update filings.
  • Provided counsel to various wind developers in complaints against utilities regarding PURPA and open access transmission tariff compliance matters.
  • Represented independent power producers during utility rate case proposing significant changes to direct access program.
  • Represented independent power producers during utility storage evaluation and proposals pursuant to HB 2193 advocating for competitive bidding.
  • Advised water utility client on compliance and transactional matters associated with utility acquisition, including request to transfer water utility, approval of affiliate interest transactions, deed review and local escrow arrangements.
  • Represented independent power producers during investigation into Oregon Public Utility Commission investigation into authority to allow deferred accounting of capital costs.

Professional and Community Involvement

  • Lewis & Clark Law School Mentor Program, Mentor
  • Multnomah Bar Association, Imprint Program Volunteer


  • Associate Editor, Environmental Law Review

Professional Experience

  • Associate Attorney, Troutman Sanders LLP, 2018- present 
  • Associate Attorney, Sanger Law, 2016- 2018 
  • Judicial Extern, U.S. District Court for the District of Oregon, Honorable Michael H. Simon, Fall 2015 
  • Transmission Law Clerk, Bonneville Power Administration, Office of General Counsel, 2014-2015
  • BP-16 Rate Clerk, Bonneville Power Administration, Office of General Counsel, 2014-2015
  • Database Administrator, Western Energy Institute, Regional Trade Association, 2013-2014
  • Docketing Manager, Marger Johnson & McCollom, Intellectual Property Law Firm, 2004-2012



  • Lewis & Clark Law School, J.D., 2015
    Certified in Environment and Natural Resources Law
  • University of Central Missouri, B.A., magna cum laude, 2001

Bar Admissions

  • Oregon

Court Admissions

  • U.S. Court of Appeals for the Ninth Circuit