Jennifer Marietta-Westberg

Vice President


  • Washington


Jennifer Marietta-Westberg coheads Cornerstone Research’s corporate and government investigations practice. Dr. Marietta-Westberg consults on economic and financial issues arising in litigation and regulatory investigations in financial markets. She addresses allegations related to financial reporting, asset management, trading, private equity, and mergers and acquisitions.

An experienced expert witness, she has testified on matters related to Rule 10b-5/Section 11 securities class actions, damages in a cryptocurrency matter, alleged insider trading, corporate governance, and the Employee Retirement Income Security Act (ERISA). Dr. Marietta-Westberg has supported respondents in enforcement actions involving the Department of Justice (DOJ) and the Securities and Exchange Commission (SEC). She leads large teams to support academic and industry experts at all stages of litigation, including trial.

Dr. Marietta-Westberg has chaired the Investor Advisory Committee of the SEC, which offers guidance to the Commission on regulatory priorities and initiatives to support the integrity of the securities marketplace. She also serves on the board of directors at the Institute for Law and Economics at the University of Pennsylvania.

Dr. Marietta-Westberg worked for ten years at the SEC, in several capacities. She served as the deputy chief economist and deputy director of the Division of Economic and Risk Analysis (DERA). Dr. Marietta-Westberg also managed economic analysis in support of Commission policy and rulemaking in the areas of asset management, broker-dealers, credit rating agencies, and market microstructure. She oversaw many of DERA’s economic analyses in support of international initiatives.

Prior to joining the SEC, Dr. Marietta-Westberg was an assistant professor at Michigan State University. Her research has been published in the Journal of Accounting and Economics, the Journal of Corporate Finance, and European Financial Management.

Women We Admire has named Dr. Marietta-Westberg to its list of exceptional Women Leaders in Washington, DC.


De Jaray et al. v. Lattice Semiconductor Corp.


The Hertz Corporation et al. v. Frissora et al.


Expert Witness 2023


FinTech Series: Emerging Economic Issues in Cryptocurrency Litigation


What Could Possibly Go Wrong? Crypto “Insider Trading,” Section 11 Standing, and SEC Climate Disclosures

Press Release

Jennifer Marietta-Westberg Recognized among the Top 50 Women Leaders of DC for 2022


The Gensler SEC: What to Expect in 2022

Press Release

Cornerstone Research Promotes Seven to Vice President

  • “COVID-19: Securities Enforcement and Shareholder Litigation Ramifications,” Securities Enforcement Forum 2020, 28 October 2020
  • Financial Market Policy Development & Research Symposium, McCombs School of Business, University of Texas at Austin, 12 August 2020
  • “Responding to and Dealing with SEC Investigations: A Comprehensive Guide,” The Knowledge Group, 9 June 2020
  • “The Expert Report, Depositions and Managing the Expert Relationship,” Expert Witness 2020, Practicing Law Institute, 27 May 2020
  • “Enforcement and Litigation Risk,” Regulation Best Interest Conference, McCombs School of Business, University of Texas at Austin, 10 February 2020
  • “Changes in and Outlook for Debt and Equity Markets,” SEC Conference: The State of Our Securities Markets, 4 December 2019
  • “Effectively Handling an SEC Enforcement Inquiry,” webinar, 15 August 2019
  • “Expert Witnesses: Strategy for Selecting, Communicating and Deposing,” Expert Witness 2019, Practicing Law Institute, 29 May 2019
  • ILE Spring Corporate Roundtable 2019, Penn Institute for Law and Economics (ILE), 3 May 2019
  • “Litigating Securities Fraud Cases against the SEC and DOJ,” Securities Enforcement Forum West 2018, 10 May 2018
  • “Litigating Securities Fraud Cases against the SEC and DOJ,” Securities Enforcement Forum 2017, 26 October 2017
  • “Asset Management Regulation under the New Administration,” Suffolk University / Merrill Lynch Wealth Management Symposium Spring 2017, 28 April 2017