People

Margaret A. Malloy Senior Litigation Attorney

New York

With over two decades of experience in employment law and complex litigation, she has represented clients in high-stakes disputes across federal and state courts, administrative agencies, and arbitration. From leading precedent-setting class actions to advocating for clients before the EEOC and New York Courts, Maggie's career is defined by her ability to navigate intricate legal challenges with precision. Whether advising on employment disputes, engaging in litigation, or negotiating resolutions, she delivers straightforward counsel that protects clients and advances their business objectives.

Catherine Malone Senior Associate

Orange County

Catherine represents individuals and companies across a broad range of industries in criminal, civil, and regulatory matters in federal and state court, and in investigations brought by the U.S. Department of Justice and U.S. Securities and Exchange Commission. She also maintains a robust pro bono practice.

Prior to joining Orrick, Catherine served as a law clerk to the Honorable Joel M. Carson of the United States Court of Appeals for the Tenth Circuit and the Honorable James A. Parker of the United States District Court for the District of New Mexico. Before law school, she worked in business advisory services at a public accounting firm in New York City.

Shaun Malone Senior Associate

London

He has a particular focus on the international technology sector and regularly advises founders and corporates on ‘exits’ by way of sales to trade or private equity purchasers. He has experience of acting on sales to many of the largest global technology companies.

Shaun frequently acts on cross-border M&A and has done so in a range of sectors, including in the technology, renewable energy, media and hospitality sectors.

He has experience working with high growth technology companies and venture capital firms on investment deals as well as with fast growing technology startups on investment rounds.

Steven Malvey Partner

San Francisco

He conducts a broad federal tax practice in large corporate transactions and reorganizations, corporate finance and partnership, including pre-acquisition tax structuring. He also has substantial experience in executive compensation tax planning, exempt organizations and federal tax controversies, and has written on related tax topics.

Danielle Mangogna Of Counsel

Washington, D.C.

She analyzes filing obligations under the Hart-Scott-Rodino (HSR) Act and guides clients through the preparation and submission of premerger filings with the Federal Trade Commission and U.S. Department of Justice Antitrust Division, as well as simultaneously coordinating corresponding merger filings under competition laws across the globe.

Additionally, Danielle has counseled clients on antitrust risk allocation in transaction agreements, pre-closing activities including information exchanges, pricing and sales practices, trade association activity, the establishment of antitrust compliance policies and the preparation of responses to government-issued civil investigative demands and subpoenas in antitrust investigations. With more than two decades practicing as an antitrust counselor, she has advised clients on antitrust matters in an extensive range of industries, including energy, food and beverage, pharmaceutical, personal care, software, retail and telecommunications.

Robbie Manhas Partner

Washington, D.C.

Robbie has achieved significant victories in areas including patent law, statutory and regulatory interpretation, administrative law, and personal and appellate jurisdiction. He specializes in patent appeals before the Federal Circuit, where he has presented oral argument seven times. His winning arguments include a complete, precedent-setting victory for a leading tech company in an appeal and cross-appeal of a PTAB decision, where he secured affirmance of the PTAB's decision to strike down some patent claims and reversal of the PTAB's decision to uphold the remainder.

Robbie has represented clients across a wide variety of industries, including semiconductors and electronics, software, pharmaceuticals, agriculture, and sporting goods. His work has also involved a number of U.S. agencies, including the Patent and Trademark Office, the International Trade Commission, the Food and Drug Administration, the Federal Energy Regulatory Commission, the Department of Agriculture, the Department of Labor, and the Department of Veterans Affairs.

Before joining Orrick, Robbie was a lawyer at Wilmer Cutler Pickering Hale and Dorr LLP, where he was a member of its Appellate and Supreme Court Litigation, Intellectual Property Litigation, and Government and Regulatory Litigation groups. Before that, Robbie was a law clerk for the Honorable Richard G. Taranto of the Federal Circuit.

Lucy Mann Associate

London

Lucy has experience working on acquisitions, disposals and investments, primarily in the technology sector.

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.