Xavier Oustalniol

Xavier Oustalniol is a Partner with StoneTurn in San Francisco. He focuses on complex forensic accounting issues, fraud investigations and prevention, and anti-corruption matters, and provides consulting services regarding damages analysis, securities class action litigations, arbitrations, accountant malpractice and purchase price disputes, including providing expert testimony.

With over 25 years of experience as an auditor, forensic accountant and litigation consultant, Xavier has worked with clients across a wide range of industries, including FinTech, banks (mortgage, retail, investment), insurance companies, investment companies, and other securities broker / dealers, as well as automotive, aviation, real estate, technology, energy, food, luxury apparel, chemicals, electronic components, gaming, telecom, broadcasting, professional services partnerships (including law firms), leasing, consumer products, agricultural business, manufacturing and transportation. Xavier has also assisted clients including the government and public defenders dealing with Ponzi scheme issues, False Claims Act and Qui Tam cases.

Xavier has testified as an accounting expert on the application of Generally Accepted Accounting Principles (“GAAP”) and other financial issues at trial, deposition and in arbitrations. He has authored expert reports, declarations and assisted with the preparation of experts for deposition and testimony. He also assisted counsel with deposition preparation of opposing experts and fact witnesses, and responses to Wells submissions.

He has assisted clients (debtors, creditors, trustees) in a number of bankruptcy-related litigations (including Enron, Lehman, Washington Mutual) and other accounting investigations, including during settlement negotiations and mediation.

Xavier has directed complex forensic accounting investigations for boards where regulators such as the U.S. Securities and Exchange Commission (“SEC”), U.S. Department of Justice (“DOJ”) and the Financial Industry Regulatory Authority (“FINRA”) were involved. He consulted on other cross-border disputes before the International Centre for Settlement of Investment Disputes (“ICSID”), the American Arbitration Association (“AAA”) and the International Chamber of Commerce (“ICC”), involving companies in Europe, South and Central America and Japan.

Prior to joining StoneTurn, Xavier was with Alvarez & Marsal, where he served as a Managing Director in the firm’s Global Forensic and Dispute Services practice in San Francisco. Previously, he was with two other global professional services firms. He began his career as an auditor with Deloitte.

Xavier is a Certified Public Accountant (licensed in the states of California and New York), Certified in Financial Forensics and a Certified Insolvency and Restructuring Advisor. He is fluent in French.