People

Kathryn G. Mantoan Of Counsel

San Francisco; Portland

Katie was a part of the trial team that obtained a complete dismissal for Oracle in OFCCP v. Oracle, a high-stakes systemic compensation discrimination case that garnered national media attention. Katie and her co-counsel were named "Litigators of the Week" by American Lawyer for the win. Two years later, Katie and her co-counsel were named Runners-Up by American Lawyer for securing decertification of a 3,000-person putative equal pay class action for Oracle.

In fall 2023, Katie co-first chaired a two week federal jury trial in Oregon and obtained a verdict against the client's former general manager, who set up a competing business while employed, on claims for breach of fiduciary duty and intentional interference.

Previously, Katie received California Lawyer’s Attorney of the Year Award in 2016 and was named a Northern California Super Lawyers "Rising Star" for seven consecutive years. She regularly writes and publishes on employment law developments, having presented on topics to three separate state bar associations and a host of national and regional legal and academic conferences.

Katie started her career at Orrick in 2004 and returned in 2015. From 2011 to 2014, she was an associate at a litigation boutique in San Francisco where she handled employment and constitutional law matters.

Dora Mao Senior Counsel

San Francisco

In addition, she advises financial services clients regularly in connection with Dodd-Frank Act compliance, Regulation AB and other securities law and regulatory compliance matters, warehouse facilities, purchase and sale agreements and template development, servicing rights and repurchase facilities.  She has also advised nonprofits in connection with financing affordable housing and economic development.

In 2012, she was seconded part-time to a finance company client, where she assisted in drafting and implementing compliance policies and procedures and related training materials.

Dora is also experienced in a broad range of securities and commercial transactions, including private and public offerings of equity and debt, mergers and acquisitions, and commercial loan origination. She has represented both issuers and investors in a wide variety of equity and debt issuances.    

Dora was Partner-in-Charge of the San Francisco office of the firm from 2000 through 2003 and serves on the firm’s Opinion Committee and Professional Development Committee.   She served on the Board of Directors of the Girl Scouts of Northern California from 2004 through 2012 and the Board of Trustees of San Francisco University High School from 2007 through 2014.

Lucrezia Marchionni Associate

Milan

Lucrezia has experience in a broad range of corporate law matters, including mergers and acquisitions and corporate governance.

Bradley Marcus Partner

Washington, D.C.

Brad’s practice includes performing case investigations, developing successful case themes, strategies, and defenses and preparing and defending key witnesses. He has significant experience managing complex litigation, handling pre-trial motions, including overseeing successful summary judgment and motion to dismiss briefings, taking and defending critical fact and expert depositions and managing complex and cross-border e-discovery matters.

In the past few years, he has been involved in a number of cutting-edge cases in the FCPA arena spanning a variety of industries, including financial services, gaming, telecommunications and commodities trading.

Prior to joining Orrick, Brad was a partner at Buckley LLP. From 1999 to 2002, Brad covered Navy football and men’s college lacrosse as a reporter for the Washington Times.

Cécile Mariotti Partner

Paris

She has significant experience in both French and international tax matters and regularly advises on complex mergers and acquisitions, reorganizations, capital markets, and financing transactions.

Cécile works with French and international corporate groups across various sectors, both public and private, as well as financial institutions and investment funds. She also represents clients in their dealings with tax authorities, including ruling requests and tax litigation. Additionally, she assists in the structuring and implementation of employee stock offerings and management packages.

Cécile teaches a seminar on the tax aspects of LBOs as part of the Master in International Taxation program jointly offered by Paris II Panthéon-Assas University and HEC. She is a member of the International Fiscal Association (IFA) and the Institut des Avocats Conseils Fiscaux (IACF), where she served on the Corporate Tax Committee until October 2020. She is also a member of the Tax Committee of France Invest and has been appointed as a rapporteur for France at the IFA Congress in Lisbon in 2025.

In addition, Cécile serves on the board of the Alliance for the Financing of Femtech in France. She maintains an active pro bono practice in the tech sector and is strongly committed to initiatives and networks that support the long-term success of women leaders in business. Notably, she served as co-leader of the Women Enriching Business Committee in Paris at Latham & Watkins.

Before joining Orrick, Cécile spent four years in the tax team at Latham & Watkins, following seven years in the tax team at Cleary Gottlieb, working in both the Paris and New York offices.

Alexis Marraud des Grottes Partner

Paris

Recommended by Legal 500 EMEA in Mergers & Acquisitions, Alexis is key counsel to French and international listed and non-listed companies, private equity and hedge funds, managers, boards and families.

He advises on investments and divestments, securities issues, cross-border and complex transactions, strategic negotiations and sensitive litigation. He is "one of the best players in the market" (Legal 500) and is an authority on issues related to governance, restructuring, as well as on shareholder activism.

Alexis has advised many world leading companies, including: SFL management and SFL in its cross border merger with Colonial, Herige in the sale of its trading branch (materials, public works and natural stones) to Samse, BAE Systems in the acquisition of Eurostep, Alcentra and Fidera in their investment in Pierre & Vacances, Air France-KLM in its relations with KLM and the Dutch State, Veolia on the acquisition of Suez, LVMH in the acquisition of Tiffany, Euro Disney regarding the tender offer of The Walt Disney Company, L’Oréal on a share buyback from Swiss-based Nestlé and a sale to Nestlé of its stake in Galderma, and Club Med on the tender offer by Chinese conglomerate Fosun. He has also advised Oeneo in connection with the tender offer of its controlling shareholder, Naturex in connection with a takeover bid by Givaudan, the board of directors of Zodiac in relation to its merger with Safran, and Metrovacesa sale of its stake in Gecina. He additionally deals with issues related to token and crypto-currency and crypto-assets issues, including structuring and setting up issuing entities and related services.

Alexis regularly publishes and intervenes in conferences and provides training on capital market, governance and M&A and he regularly lectures at the business school EM Lyon and Paris Dauphine University. He has been a member of several working groups, including the working group on public offers of the Legal High Committee for Financial Markets of Paris. The French Financial Market Authority (Autorité des marches financiers - AMF) has invited Alexis to join its consultative Commission on Disclosures and Corporate Finance as a capital markets law specialist.

Jean-Pierre Martel Partner

Paris

He is called on by boards and management teams to advise on mergers, divestitures, corporate acquisitions and restructurings as well as litigations and arbitrations. He is the founding partner of the premier French boutique Rambaud Martel, which combined with Orrick’s global platform in 2006.

Jean-Pierre has recently had a hand in the most significant cross-border deals in the French market. His work includes advising the board of Alstom on the $17 billion sale of its power units to General Electric, counseling L’Oréal on buying back 8% of its own capital from Nestlé, associated with the sale of assets, advising Peugeot’s family on the restructuring of Peugeot SA’s capital which involved China’s Dongfeng Motor Group and the French state, the board of Club Méditerranée in the context of competing take-over bids from China’s Fosun Group and Italia’s Bonomi’s Group, the board of Areva in the financial restructuring of the company.  

Chambers & Partners recognized Jean-Pierre as an “Individual Star” in Corporate/M&A, noting that he is a “seasoned and highly-respected M&A practitioner whose experience covers a wide range of transactional activities.

Jean-Pierre has also developed very substantial litigation and arbitration experience, being ranked Band 1 by Chambers in Dispute Resolution. Most notably, among his successes, the very high-profile Bernard Tapie Case where he has been assisting Consortium de Réalisation, the French government entity tasked with liquidating the assets of Crédit Lyonnais for the French State. Jean-Pierre won rulings from the Paris Court of Appeal in 2015 that withdrew initial arbitral awards that had required CDR to pay €404 million to Tapie’s liquidators and companies and sentenced them to repay CDR the full amount plus interests and costs. He has just succeeded in obtaining visible Court decisions which have released from any criminal liability charged persons with tax fraud.

Jean-Pierre also serves as an arbitrator in ad hoc, ICC and AFA arbitration proceedings.

He speaks and publishes regularly.

Jean-Pierre is the founder and a member of the board of the Institute for Brain and Spinal Cord Disorders - ICM, a state-approved foundation which is on its way to becoming the leading international research center in Europe in the Neurosciences.