Andrea I. Sarmentero Garzón

Andrea I. Sarmentero Garzón Associate

P: 202.370.4128
F: 202.370.0142
L: Washington, D.C.

Andrea Sarmentero Garzón focuses her practice on energy regulatory and transactional matters. Since joining JSS, Ms. Sarmentero has represented clients on various rate proceedings initiated pursuant to Section 4 and Section 5 of the Natural Gas Act and on a RTO Return on Equity litigation initiated pursuant to Section 206 of the Federal Power Act. Ms. Sarmentero advises clients on matters concerning transmission revenue requirements, petitions for transmission rate incentives, participation in energy and capacity markets or resource adequacy programs in RTOs/ISOs, licensing of hydropower projects, compliance with FERC pro-forma Open Access Transmission Tariff and Rate Schedules, compliance with electric reliability standards, and transmission planning and cost allocation under FERC Order No. 1000. Ms. Sarmentero has drafted and/or negotiated agreements concerning ownership and operation of transmission facilities, dynamic transfer of energy, generator interconnection and affected system agreements, as well as water and power supply agreements. Ms. Sarmentero was also heavily involved in the preparation of FERC filings and settlement negotiations to integrate one of our clients into the PJM region. 

Prior to joining JSS, Ms. Sarmentero worked at the New Jersey Board of Public Utilities’ Counsel Office where she gained a good understanding of public and non-public utilities’ business and regulatory compliance obligations at the state and federal levels. In addition, Ms. Sarmentero has extensive energy regulatory and transactional experience in Europe where she served at the Council of European Energy Regulators in Brussels and at the energy and project finance practice of a global law firm in Madrid.

Areas of Focus

  • Energy Law

Articles, Publications and Presentations

Digital Media

Honors, Appointments and Awards

  • NEA-OCDE Fellowship (2005)

Other Languages

  • Spanish (Native)

  • French (Intermediate)

Professional Affiliations

  • Member, New York City Bar Association
  • American Bar Association
    Environment, Energy and Resources Section, Member
    Antitrust Section, Member
  • Member, Energy Bar Association
  • Member, Ilustre Colegio de Abogados de Madrid
  • Member, Hispanic Bar Association of the District of Columbia
  • Member, Women's Energy Network

Admitted to Practice

  • New York, 2012
  • Spain-Ilustre Colegio de Abogados de Madrid, 2005

Court Admission

  • U.S. Court of Appeals, District of Columbia Circuit, 2016
  • U.S. Supreme Court, 2015
  • U.S. Court of Appeals, Fifth Circuit , 2014


  • New York Law School, Foreign Lawyer Training Program, 2009
  • Diploma in Internatonal Nuclear Energy Law, University of Montpellier, 2006
    Montpellier, France
  • Master in Business and International Trade, University Complutense, 2005
    Madrid, Spain
  • L.L.M., University of Dundee (CEPMLP), Energy Law & Policy, 2002
    Dundee, UK
  • J.D., University of Malaga, 2000
    Málaga, Spain