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  • White Collar, Investigations, Securities Litigation & Compliance

Aaron Brecher Senior Associate White Collar, Investigations, Securities Litigation & Compliance


Aaron Brecher is a member of Orrick's White Collar, Investigations, Securities Litigation, and Compliance Group. He's passionate about helping individuals and companies through some of their most difficult and sensitive challenges: investigations that could lead to government enforcement actions and resulting litigation.

Aaron has defended investigations by the U.S. Department of Justice, the Washington Attorney General's Office, and other state and federal agencies. He has also represented defendants in civil and criminal litigation brought by the government and by relators. And he has conducted internal investigations on matters ranging from data breaches to harassment to suspected environmental testing fraud. 

Aaron maintains an active pro bono practice that has included:

  • Presenting a successful petition for clemency to the Washington Clemency and Pardons Board on behalf of a prisoner serving life without parole
  • Representing an indigent criminal defendant charged with federal arms export offenses
  • Briefing and arguing an appeal of the dismissal of a prisoner's civil rights claims before the Ninth Circuit, winning a partial reversal and a remand

To keep up with the latest white collar developments, Aaron co-founded and regularly contributes to Target Letter, a blog focused on white collar crime and other government enforcement issues. He is also a Certified Anti-Money Laundering Specialist through ACAMS.


  • Corporate
  • Technology Transactions
  • Technology Companies Group

Mary Bates Project Attorney Corporate, Technology Transactions

Wheeling, W.V. (GOIC)

Mary is a member of the Orrick Analytics Group. She is an experienced corporate lawyer focused on transactional matters and strategic counsel to leading life sciences and technology companies. She handles corporate issues typically overseen by in-house counsel, with an ardent awareness of in-house counsel’s need to receive exceptional work in an expeditious manner. She provides tactical guidance on managing the complete life cycle of corporate, life sciences, and technology agreements.  

Stemming from her experience and knowledge in the life sciences and technology industries, Mary has drafted and negotiated complex, industry-specific agreements such as the following: clinical trial agreements, investigator initiated study agreements, material transfer agreements, collaborative research agreements, sponsored research agreements, master service agreements and work orders, facility use agreements, nondisclosure agreements, product development agreements, joint-development agreements, and software license and technology agreements.

Mary counsels in-house business teams directly by effectively working with various departments and levels within the clients’ corporate structures to manage work for cross-functional teams on legal issues and provides guidance and practical solutions on various transactions. In addition, she creates and successfully implements contract review and negotiation policies / playbooks for clients. 




  • Tax
  • Tax Advocacy

Bridget Winters Managing Associate Tax, Tax Advocacy


Bridget Winters is an associate in the Tax group in London.

Bridget works across all areas of non-contentious tax with particular experience in corporate tax, investment funds, VAT and share schemes and incentives.

Before joining Orrick, Bridget trained at the Bar before qualifying as a solicitor in DLA’s tax litigation practice in 2012.


  • Energy
  • Infrastructure
  • Corporate
  • Project Finance

James Billard Associate Energy, Infrastructure

Washington, D.C.

James is a member of the Energy and Infrastructure Group.

James represents developers, electric utilities, lenders and investors in project financings, infrastructure projects, private placements, securities offerings and asset transfers. In the energy sector, his work focuses on the development, financing and construction of renewable generation facilities.


  • Corporate
  • Renewable Energy
  • Banking & Finance

Natalia Barbera Associate Corporate, Renewable Energy

Natalia Barbera is an Italian qualified lawyer and a senior associate of the corporate team of the Italian office in Milan. She focuses her practice in regulated sectors including banking, asset management, investment services and insurance.

She provides legal assistance to regulated entities on several regulatory requirements including: structuring investment funds and other investment schemes, organization requirements, anti-money laundering, governance structures, internal controls, authorization processes, offering new services and products also through digital support, investigation and penalties proceedings.

She was seconded to the legal and compliance department of Morgan Stanley, Milan office (from March 2014 to November 2016) and to the legal and corporate affair department of Intesa Sanpaolo Vita, Milan office (from October 2017 to November 2018).


  • White Collar, Investigations, Securities Litigation & Compliance
  • Litigation & IP
  • Trials
  • White Collar

Elizabeth Morgan Senior Associate White Collar, Investigations, Securities Litigation & Compliance, Litigation & IP


Elizabeth Morgan is a senior associate in the White Collar Criminal Defense and Corporate Investigations group in Sacramento. Elizabeth's practice focuses on white collar criminal defense, including corporate internal investigations and criminal and regulatory investigations conducted by the DOJ.

She has extensive experience in health care fraud, including cases involving the False Claims Act.  She has also represented clients in civil matters related to breach of contract and fraud.  Prior to joining Orrick, Elizabeth was an associate with Quinn Emanuel Urquhart & Sullivan LLP and at Cravath, Swaine & Moore LLP.  She is also a former law clerk to Associate Justice Simeon R. Acoba, Jr., of the Hawai'i Supreme Court.


  • Intellectual Property
  • IP Counseling & Due Diligence
  • U.S. International Trade Commission
  • Patents
  • Automotive Technology & Mobility
  • 3D Printing

Christopher J. Siebens Senior Associate Intellectual Property, IP Counseling & Due Diligence

Washington, D.C.

Chris brings a focused perspective to the daily challenges that companies face and a keen understanding of how intellectual property can shape their business operations.

Having been seconded with a large Japanese consumer electronics company for nearly two years, Chris has firsthand experience working across company divisions, analyzing legal and business risks, and devising strategies that fit in to a company’s larger goals. In particular, Chris advised business managers on negotiating technology and license agreements and provided guidance on a diverse set of legal issues, such as indemnification, ownership rights arising from joint development efforts, non-assertion provisions, and open source software.

Chris’ practice at Orrick builds on his experience as an engineer and member of the patent bar. He focuses on patent litigation and pre-suit patent licensing negotiations spanning a wide range of technology areas, including LCD driver control, panel backlighting, semiconductor chip fabrication, DRAM circuitry, wireless technologies, and optical sensors. Chris’ litigation experience includes assisting with trial and witness preparation, drafting motions, taking depositions, conducting infringement and validity analysis, and managing discovery. He also has experience with inter partes review (IPR) and reexamination proceedings, and the prosecution of patent applications at various stages, before the U.S. Patent & Trademark Office.

Prior to joining Orrick, Chris worked at an international law firm specializing in intellectual property. While in law school, Chris worked at two Korean law firms in Seoul, South Korea and studied at Keio University Law School in Tokyo, Japan.

Prior to law school, Chris worked as an engineering intern for Kimberly-Clark Corporation in its Beech Island, South Carolina, manufacturing plant.

Siobhan Handley Chief Talent Officer

New York

Siobhan Handley is Orrick’s Chief Talent Officer. She is responsible for developing and executing talent and human resource strategies to advance the firm’s strategy and serve its clients.

In collaboration with the firm’s leadership team, she focuses on designing and implementing programs to recruit, inspire and advance the best legal and staff talent.

Siobhan previously served as Orrick’s Managing Director for Resources. In that role, she spearheaded the development of the firm’s innovative talent model—the first of its kind in a major law firm—which replaces the traditional associate lockstep advancement system with merit-based advancement. As chair of the firm’s Talent Committee, she oversees Orrick’s lawyer training and performance feedback program – which is one of the most rigorous in the market. She also has led the creation of a range of new lawyer and professional staff roles.

Siobhan brings to this role extensive experience on the front line of client service, having been a partner in the firm’s product liability litigation and mass tort defense group. For more than a decade, she was a member of the Orrick team that acted as National Counsel to Union Carbide Corporation in connection with asbestos-related personal injury lawsuits and served as lead trial counsel in cases across the country. Siobhan was one of the key trial counsel in the highly-publicized landmark trial in Texas State Court, Brazoria County, where Kelly-Moore Paint Company sued Union Carbide for $1.4 billion in compensatory damages and $4.2 billion in punitive damages that resulted in a complete defense verdict. In addition, she served as trial counsel for significant product liability cases for other clients including Wyeth and Flexible Products.



  • M&A and Private Equity
  • Structured Finance
  • Corporate
  • Energy
  • Infrastructure

Robert Gloistein Senior Counsel M&A and Private Equity, Structured Finance

San Francisco

Robert Gloistein has been a senior counsel in the San Francisco office since retiring in 2004.

During his association with the firm for more than 40 years, he has had a diverse public utility and business practice, involving public and private finance, utility mergers and acquisitions, facilities disposition, electric industry restructuring and telecommunications deregulation.  Bob concentrates on issues involving nonprofit corporations and law practice management.



  • White Collar, Investigations, Securities Litigation & Compliance
  • White Collar
  • FCPA & Anti–Corruption
  • Internal Investigations
  • Government Investigations and Enforcement Actions

Spencer Bruck Senior Associate White Collar, Investigations, Securities Litigation & Compliance, White Collar

New York

Spencer Bruck counsels corporations and individuals on a wide range of high-stakes, international white collar matters, including criminal and civil investigations by government regulators, internal investigations, diligence on transactions, and analyzing and enhancing compliance policies and procedures. As a senior associate in the White Collar and Corporate Investigations practice group, Spencer's practice focuses on representations involving the Foreign Corrupt Practices Act (FCPA), securities violations and accounting fraud.   

Spencer has represented companies and individuals in matters before the U.S. Department of Justice, the U.S. Securities and Exchange Commission, state Attorneys General, the Senate Permanent Subcommittee on Permanent Investigations, FINRA, and multilateral development banks.  He also has experience interfacing with various corporate stakeholders and external accountants. His practice has also involved investigations into private boarding schools in the United States. 

Mr. Bruck is also active in pro bono work. He represents individuals in criminal cases and is involved in civil rights issues.



  • Structured Finance
  • Debt Capital Markets
  • Banking & Finance

Roberto Percoco Associate Structured Finance, Debt Capital Markets


Roberto Percoco  is an Italian qualified lawyer, Managing Associate in the Finance Team, based in the Rome Office.

He specialises in finance transactions with particular emphasis on debt capital markets, including Covered Bonds and Mini-Bonds, on which he has gained significant expertise.

In these areas, he advises major banks acting as arrangers and lead managers, and issuers.

He graduated in law at the University of Rome "Tor Vergata", with 110/110 and obtained a Master's degree in Corporate Counsel at the LUISS Business School University in Rome in 2012.

He is Italian mother tongue and fluent in English.

Charles Briand Partner Tax


Charles Briand, Partner in Orrick Paris Office, is a member of the Tax Group.

Charles is specialized in tax law, and more specifically on the tax aspects of transactions.

He advises multinational companies and private equity funds on a broad range of international tax matters, including French acquisitions abroad or foreign ones in France.

He also advises his clients on the tax structuring of domestic and cross border acquisitions as well as reorganizations.

Prior to joining Orrick in 2017, Charles was transaction Tax lawyer at Ernst &Young in Paris and he also practiced eighteen months in EY New York office.