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Kate O'Laughlin Director, Tech and Investment

San Francisco

Clients and their success are Kate’s focus. As Director, Tech and Investment, Kate works with emerging and high-growth technology companies at each stage of the company’s lifecycle, from making impactful, targeted introductions to strategic investors to advising on key hires to identifying core attorneys with the precise subject matter expertise.

Kate brings a macro perspective when strategizing with founders, CEOs, general counsels and other executives on a company’s immediate, medium and long-term needs, drawing on her market knowledge and experience as both an in-house and firm attorney. It is important to Kate that clients have the right connections and resources in place at the right time. She focuses on identifying and facilitating such connections by leveraging Orrick’s extensive, global network so clients can focus on running a successful business.

Kate began her career as an in-house lawyer for a private, high-growth tech company, supporting the business through its IPO. During her years there, she juggled scale and rapid growth with budget constraints, KPIs and legal risks, developing her practical, collaborative, business savvy approach. She then joined Orrick’s Technology Companies Group, where she counseled fast paced technology companies cutting across all sectors from HealthTech and Life Sciences to Robotics and FinTech.

Kate relies on her experience as a mediator not only to craft creative solutions to challenging issues, but also to build alliances. Her background in fundraising and political organizing for high impact local and global non-profits has instilled in her an ease for asking the tough questions and partnering with a variety of influencers.



  • Corporate
  • Energy
  • Infrastructure
  • M&A and Private Equity
  • Project Finance
  • Renewable Energy

Marcello Montresor Associate Corporate, Energy


Marcello is a member of the Energy & Infrastructure department since 2013. Marcello’s practice focuses mainly on renewable energy, in Italy and abroad.

Marcello regularly works on M&A and private equity transactions in the energy and infrastructure industries, assisting sponsors developers and investors in the acquisition or sale of totality, majority or minority shareholdings and in project construction/management related matters.

Marcello also has significant experience in PPAs transactions and financing transactions, having assisted mainly sponsors in a number of project finance, asset finance, refinancing, leasing and PPAs transactions.

Marcello assists clients in drafting and negotiating all transaction documents, including SPAs, joint venture agreements, shareholders’ agreements, facility agreements, PPAs, EPC and O&M agreements. Marcello also counsels clients on general corporate matters and day-to-day operating matters, including contracts management and other related legal matters.

In 2016, he spent a four-month period in Orrick's London office, advising as a secondee and in conjunction with the London E&I team a global leading solar company in acquisitions of ready-for-construction solar PV plants in the United Kingdom.


  • Corporate
  • Capital Markets
  • Technology Companies Group

Bill Hughes Partner Corporate, Capital Markets

San Francisco; Silicon Valley

Bill Hughes leads Orrick’s Capital Markets practice. He focuses on securities offerings, counseling public and late-stage private companies and securities law compliance.

Bill counsels public and late-stage private companies on general corporate and transactional matters, including advising on initial public offerings, follow-on equity offerings, investment grade debt offerings and convertible debt offerings. Bill also regularly advises companies on disclosure and reporting obligations under U.S. federal securities laws, corporate governance issues and stock exchange listing obligations.



  • M&A and Private Equity
  • International Arbitration & Dispute Resolution
  • Complex Litigation & Dispute Resolution
  • Corporate

Siegfried Elsing, Prof. Dr. LL.M. (Yale) Partner M&A and Private Equity, International Arbitration & Dispute Resolution


Siegfried H. Elsing, based in Orrick's Düsseldorf office, is a globally recognized international arbitration lawyer with more than 30 years of experience acting as counsel, party-appointed arbitrator, sole arbitrator or chairman. He represents private investors, international companies, sovereign states and state agencies on a national and international level.

Siegfried has acted in approximately 300 arbitrations, including ad hoc proceedings as well as arbitral proceedings under the rules of leading arbitral institutions such as DIS, HCCI, HKIAC, ICC, ICSID, SCC, SCAI, VIAC and others. From 2011 to September 2017, he served on the Panel of Conciliators for the Administrative Council of the International Centre for Settlement of Investment Disputes (ICSID).

Siegfried's experience extends in particular to complex disputes involving M&A and corporate transactions, investment protection, energy law, infrastructure disputes, financing arrangements, insurances, joint ventures, distributorship agreements and IP disputes. He also advises on transactional matters, financing, licensing, construction, joint ventures and M&A transactions.

He is dual qualified, admitted in both Germany and New York, and is fluent in German, English and French. He has appeared as a legal expert witness in the German, U.S. and UK courts (on German law matters) and before other foreign law-making institutions.

Market commentary in Chambers Global 2020 describes Siegfried Elsing as a “star individual” who “is frequently appointed as arbitrator on complex cross-border arbitrations”. He is lauded as “a leading practitioner in investment arbitration” with “extensive expertise as arbitrator on investment cases”.

Siegfried co-founded German law firm Hölters & Elsing in 1989 and oversaw the firm's merger with Orrick in 2008.

Since 2007 he is Honorary Professor at the Heinrich Heine University Faculty of Law, Düsseldorf, where he teaches International Arbitration and Civil Procedure. Siegfried is a member of the Board of the German Arbitration Institute (DIS) and was (until May 2020) a Council Member of the American Arbitration Association (AAA). Siegfried was a member of the Drafting Committee for 2018 DIS Arbitration Rules. He is co-editor of the German Arbitration Journal (SchiedsVZ). Siegfried was also chair of the Mediation Committee of the International Bar Association (IBA). 

In 2013 Siegfried was selected to serve as Honorary Consul of the Grand Duchy of Luxembourg.



  • Supreme Court & Appellate
  • Complex Litigation & Dispute Resolution
  • White Collar, Investigations, Securities Litigation & Compliance
  • Bankruptcy Litigation
  • Litigation & IP

Robert Loeb Partner Supreme Court & Appellate, Complex Litigation & Dispute Resolution

Washington, D.C.

Bob Loeb is a partner in Orrick's Supreme Court and Appellate Litigation practice, specializing in high stakes and complex cases. He has briefed hundreds of cases and has personally argued more than 185 appeals, including cases in the U.S. Supreme Court, every federal circuit and numerous state courts.

His breadth and depth of appellate experience and track record of success in high-stakes matters are why clients, including top financial institutions and tech and energy companies, trust Bob with their most important cases.

In April 2019, Bob argued to the U.S. Supreme Court in Food Marketing Inst. v. Argus Leader Media, regarding Exemption 4 of the Freedom of Information Act, which permits the government to withhold “confidential” private-sector “commercial or financial information” within the government’s possession. In January 2019, Bob argued and won a billion-dollar case for a leading financial institution in New York’s highest court. In 2018, he argued to the U.S. Supreme Court in Byrd v. US, regarding the application of the Fourth Amendment to rental cars, and won a 9-0 victory. In July 2018, Bob also won a Second Circuit appeal on an important, multi-million-dollar case regarding email phishing. Bob is also a leader on fintech issues, regularly advising fintech lending platforms, banks, and investors.

Before joining Orrick, Bob served as one of the leaders of an elite appellate group at the Department of Justice. There, in addition to major national security, commercial, and administrative law, Bob supervised bankruptcy appeals. At Orrick, Bob has continued to handle big ticket bankruptcy matters, such as a billion-dollar dispute over whether DHL’s claim was discharged by United’s bankruptcy, appeals from the City of Stockton bankruptcy confirmation, and a Ninth Circuit matter involving the interplay of the Takings Clause and bankruptcy law.

Bob’s recent work includes matters for Johnson & Johnson, Credit Suisse, Microsoft, Gannett, Eni, Lending Club, Deloitte, EY, Medidata, Intel, Renco, and the City of Stockton.



  • International Arbitration & Dispute Resolution
  • Oil & Gas
  • Energy
  • Complex Litigation & Dispute Resolution
  • White Collar
  • FCPA & Anti–Corruption
  • Africa

Mark Beeley Partner International Arbitration & Dispute Resolution, Oil & Gas


Mark Beeley is "the standout performer: a highly skilled advocate who is a match for any heavyweight silk in a hearing, but also sees the wider commercial context. He is able to fix the strategy and deliver it, giving clients the confidence that the man at the front really understands and cares about their case." - Legal 500 UK 2021

Mark acts as advocate and counsel in international arbitrations (both commercial and investor-state) and in litigation in the English and DIFC courts. He has particularly deep experience in energy disputes, but also regularly acts in construction, technology, insurance, shareholder and white-collar/civil fraud matters, as part of a broader commercial practice.

Mark has acted in arbitrations under the ICSID, LCIA, UNCITRAL, ICC, HKIAC, SIAC, LMAA, DIAC, AAA and other arbitration rules in disputes seated around the globe concerning multiple governing laws and is recognised in the leading directories for arbitration and natural resources disputes. In addition, he sits as arbitrator (including both as chairman and sole arbitrator). He previously practiced in Dubai as a Registered Foreign Lawyer and maintains a practice as advocate (and solicitor) in both the English and DIFC Courts (along with supervising cross-border litigation in multiple jurisdictions). Mark has been recognised as a foreign expert in disputes in both the UAE and India by Chambers.  He has been consistently ranked by Chambers for arbitration, as well being recognised in Legal 500 for both arbitration and commercial litigation.

He has a particular interest in energy sector disputes, including those in the upstream and LNG areas (he was described by Chambers & Partners UK 2018 as “an excellent litigator” knowing “oil and gas inside out” and is recognised in Who's Who Legal for Energy), but has dealt with matters across the industry, running the gamut from seismic acquisition agreements through to IP disputes involving refined products, carbon trading agreements and the construction of renewable projects. He currently leads the AIPN Model Form Revision sub-committee focusing on the dispute resolution aspects of the model form JOA.

Beyond energy, Mark has acted in the infrastructure/construction, technology, insurance, crypto-currency, fintech, pharmaceutical, telecoms, insurance and finance sectors (amongst others) and also advises extensively on white-collar/fraud matters, including money laundering, bribery, sanction and export control issues.

Originally called to the English Bar and now practicing as a solicitor-advocate, Mark frequently publishes and speaks on arbitration and energy matters, including on questions of sovereign immunity, res judicata, arbitration procedure, the award of interest and other questions on damages. He features in two categories of Who’s Who Legal, Arbitration and Energy 2020.



  • Corporate
  • M&A and Private Equity

Hayat Makhloufi Associate Corporate, M&A and Private Equity


Hayat Makhloufi is associate in the Düsseldorf office and member of the M&A and Private Equity Group. 

She advises national and international clients on M&A/Privat Equity transactions, intragroup crossborder restructuring measures and general corporate law. 

Prior to joining Orrick, Hayat Makhloufi worked in another international law firm where she advised German companies on international investments and transactions and foreign investors on business activities in Germany, Europe and in particular in the Middle East. 



  • M&A and Private Equity
  • Equity Capital Markets
  • Corporate
  • Blockchain and Cryptocurrency

Alexis Marraud des Grottes Partner M&A and Private Equity, Equity Capital Markets


Alexis Marraud des Grottes is an M&A and Capital Markets lawyer in Orrick’s Paris office. His practice covers both transactional and litigation advice on mergers and acquisitions, securities and stock exchange regulations and corporate law.

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

He was involved on some of the most publicized deals in France recently. His works includes, for instance, advising Naturex in connection with a €1.5 billion takeover bid by Givaudan, the board of directors of Zodiac for its combination with Safran for €8.5 billion, Euro Disney regarding the tender offer of The Walt Disney Company, L’Oréal on a €6 billion share buyback from Swiss-based Nestlé and a €3 billion sale to Nestlé of its stake in Galderma, Metrovacesa sale of its €1.5 billion stake in Gecina and Club Méditerranée on the tender offer by Chinese conglomerate Fosun.  

Alexis is also recognized for his expertise on the aspects of private equity, joint ventures, equity capital markets and restructuring, as well as on specific issues related to governance and shareholder disputes.

He advises in particular on cross-border and complex transactions, securities issues, strategic negotiations and sensitive litigations. 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 is a leading player, recognized for its publications, conferences and trainings on securities, corporate and takeover laws. He regularly lectures seminars at the business school EM Lyon and Paris Dauphine University. He has been a member of several working groups on Paris place, including the working group on public offers of the Legal High Committee for Financial Markets of Paris. He is a member of the Association of Lawyers in Securities Law.



  • M&A and Private Equity
  • Technology Companies Group

Dr. Christina Lorenz Senior Associate M&A and Private Equity, Technology Companies Group


Christina is a Senior Associate and a member of the M&A and Private Equity Group and a member of the Technology Companies Group. She has a broad experience advising domestic and cross-border M&A and private equity transactions as well as venture capital investments.

Christina represents clients in all types of corporate transactions and on all aspects of related corporate law matters and regulatory issues, with an emphasis on cross-border transactions. This includes transactions and advice with regard to technology companies (including advising fintech transactions and advising companies in the mobility and in particular autonomous driving sectors).

Prior to joining Orrick in Munich, she worked at another international law firm renowned for its Warranty & Indemnity insurance practice with regard to large M&A transactions. This also included secondments to the legal department as well as the M&A insurance team of a major international U.S. insurance company. Previously she gained work experience for one year in law firms in New York and Atlanta.

Christina studied law and economics at Passau University and graduated with the German law degree from Freiburg University. She also holds a Diploma in Legal Studies from King’s College London, and an LL.M. from Duke University, North Carolina.

Christina is admitted to the German Bar (since 2010) and the New York Bar (since 2007).



  • Public Policy

Michelle McGann Senior Strategist Public Policy

Washington, D.C.

Michelle McGann is a senior strategist in Orrick’s Public Policy group. She uses her extensive experience working with legislators to address clients’ most important state legislative and regulatory problems.

Before joining Orrick, Michelle gained broad experience working with elected leadership at the federal and state government levels. Most recently as Executive Director of the Republican Legislative Campaign Committee, Michelle was responsible for advancing the Committee’s objectives of providing financial support, leadership development, and strategic assistance to lawmakers nationwide. In her previous leadership positions at the National Republican Senatorial Committee and the National Republican Congressional Committee, Michelle reported directly to Senate and House leadership and was tasked with advancing their objectives by evaluating and managing the nexus of policy initiatives and political impact.

Michelle is a graduate of Amherst College, where she received a B.A. in Political Science.



  • Banking & Finance
  • Direct Lending
  • Project Finance

Matthew Shellenhamer Managing Associate Banking & Finance, Direct Lending

New York

Matthew is an associate in Orrick's New York office and a member of the Banking and Finance Group.  His practice focuses on complex commercial finance transactions.

Matthew assists major financial institutions, public and privately owned companies and direct and alternative lenders in effectively assessing legal risks in complex secured and unsecured commercial finance transactions. He advises on a wide variety of finance transactions, including corporate financings, acquisitions, dividend recapitalizations and project financings. 

Prior to joining Orrick, Matthew was an associate in the Project Finance group at Chadbourne & Parke LLP.



  • Real Estate Finance
  • Real Estate

Cristine LeVasser, LEED AP Associate Real Estate Finance, Real Estate

Los Angeles

Cristine LeVasser is a Real Estate Associate in Orrick's Los Angeles office.

Cristine advises clients on commercial real estate transactions including joint venture structuring and construction, development and lease agreements. She joined Orrick in 2016 as a Summer Associate. Prior to attending law school, Cristine was a designer and project manager at a Los Angeles-based architecture firm, where she oversaw the design and construction of retail, corporate office and residential projects of various scales.