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  • Supreme Court & Appellate

Katherine M. Kopp Managing Associate Supreme Court & Appellate

Washington, D.C.

Katherine Kopp represents prominent tech clients in high stakes patent appeals before the Federal Circuit. 

Katherine has focused on these high stakes appeals since she began her career at Orrick in 2010.  In that time, she has represented clients such as Dow AgroSciences LLC in two Federal Circuit victories in an ongoing patent dispute with Bayer CropScience AG; VeriFone Systems, Inc., in a successful appeal from a district court order that would have undermined its ubiquitous payment terminals; Nintendo Co. in defense of its most important product―the Wii; and EMC Corp. in obtaining the definitive pre-America Invents Act opinion addressing the improper use of joinder in patent cases. 

Jennifer Z. Korff Chief Practice Officer - Energy & Infrastructure

New York

Jennifer Korff is the Chief Practice Office of Orrick’s Energy & Infrastructure Business Unit, which comprises nearly 150 lawyers around the world. She works closely with the business unit leaders on the strategy, operation and management of the practice, including oversight of its financial performance, business planning and execution, lateral partner integration and talent management.

Jennifer has been engaged in all aspects of the business of law. She was a corporate lawyer at Stroock prior to becoming an executive at Sony Music. After earning her MBA at Columbia in 2007, she moved into law firm leadership, helping to negotiate two law firm combinations (first McKee Nelson, later Bingham). Jennifer joined Orrick from Winston & Strawn, where she established the role of Director of Litigation Practice Operations and oversaw the firm's 450-attorney global litigation department.

She and her husband, whom she met on a blind date stemming from the Sony Music-BMG merger, live in New York City with their two daughters.



  • Litigation & IP

Christine M. Kosir Litigation & IP

Wheeling, W.V. (GOIC)

Christine Kosir is a member of the Discovery Analytics and Review Services group at Orrick. Christine works with litigation attorneys and third party vendors to manage the review and production of documents relevant to investigations and litigation. 

The Discovery Analytics and Review Services group specializes in using technology and project management discipline to assist firm attorneys with litigation and transactional tasks, particularly tasks that involve large volumes of data and documents.

This work includes using early case assessment technology to analyze, categorize and cull data. Christine also manages teams of specialists performing document review, redaction, analysis, production and drafting privilege logs. She assists the litigation team to prepare for trial, including drafting deposition summaries, factual memoranda and exhibit charts. Christine also works with practice office attorneys on transactional tasks, including contract review and due diligence.


  • M&A and Private Equity

Wendy R. Kottmeier Of Counsel M&A and Private Equity

Orange County

Wendy R. Kottmeier, Of Counsel in Orrick’s Orange County office, is a member of our M&A and Private Equity group.

Wendy R. Kottmeier advises clients in mergers and acquisitions transactions, public and private offerings of securities, commercial contracts, and general corporate guidance. She is a trusted advisor to companies across various sectors, including the technology, medical, beauty, and consumer products industries.



  • Oil & Gas
  • M&A and Private Equity
  • Energy
  • Corporate
  • Infrastructure

Adam Kowis Senior Associate Oil & Gas, M&A and Private Equity


Adam focuses on complex oil and gas commercial transactions, including acquisitions and divestitures, joint venture/development arrangements, private equity investments, and commercial arrangements.

His experience includes drafting and negotiating purchase and sale agreements, joint venture/development agreements, and upstream and midstream commercial contracts. He regularly represents domestic and international integrated oil and gas companies, independent exploration and production companies, private equity funds, portfolio companies, and pipeline companies.


  • Supreme Court & Appellate

Randy Kozel Associated Law Professor Supreme Court & Appellate

San Francisco

Randy Kozel is a professor of law at Notre Dame Law School and an Associated Law Professor in Orrick’s Supreme Court and Appellate Litigation practice.

Randy was named the Distinguished Teacher of the Year by the Notre Dame Law School Class of 2014. He also runs the Notre Dame Program on Constitutional Structure.

Randy teaches and researches in fields including constitutional law, federal courts, information privacy, and contract law, with a particular focus on the role of precedent in legal decision making. His recent scholarship exploring the connection between precedent and interpretive philosophy has been published or is forthcoming in journals including the Michigan Law Review, the California Law Review, the Vanderbilt Law Review, and the Texas Law Review. His forthcoming book, entitled Settled Versus Right: A Theory of Precedent, makes the case for using precedent to bridge interpretive disagreements.

Randy received his J.D., magna cum laude, from Harvard Law School, where he was the Articles Committee Chair of the Harvard Law Review. He served as a law clerk for U.S. Supreme Court Justice Anthony M. Kennedy and for Judge Alex Kozinski at the U.S. Court of Appeals for the 9th Circuit. He has also practiced as a litigator with a large law firm and as Special Counsel to the General Counsel at General Electric Company.

Randy is admitted to practice in California and provisionally admitted in Indiana.



  • Securities Litigation, Class Actions and Shareholder Derivative Lawsuits
  • White Collar, Investigations, Securities Litigation & Compliance
  • Trials

James N. Kramer Partner Securities Litigation, Class Actions and Shareholder Derivative Lawsuits, White Collar, Investigations, Securities Litigation & Compliance

San Francisco; Silicon Valley

James N. Kramer leads Orrick's Securities Litigation Practice. Jim has more than 25 years of experience defending companies, officers and directors in shareholder class actions, derivative suits and regulatory proceedings.

Jim is acknowledged by Chambers as a "Leader in Their Field" for Securities Litigation and has also been acknowledged as one of "America's Leading Litigators" by Benchmark Litigation. Benchmark has also recognized Jim in their securities rankings as a "California State Litigation Star", a "San Francisco Litigation Star", and in their "Practice Area Rankings California".

Jim has extensive experience representing companies and individuals in securities class actions, derivative actions, merger and acquisition related litigation, SEC enforcement proceedings and other complex commercial litigation. In addition, he has extensive experience representing board committees in internal investigations, including SEC- and SRO-related investigations.

Jim regularly advises companies on corporate governance, fiduciary duty and disclosure issues. He is a frequent lecturer on issues involving securities matters and class action litigation.



  • International Arbitration & Dispute Resolution
  • Complex Litigation & Dispute Resolution

Margaretha Kramer, LL.M. Managing Associate International Arbitration & Dispute Resolution, Complex Litigation & Dispute Resolution


Margaretha Kramer, née Lawrynowicz, is a Managing Associate in the Düsseldorf office and a member of the International Arbitration Group.

Margaretha advises and represents clients in national state court and international arbitration proceedings. She furthermore acts as Administrative Secretary for Arbitral Tribunals under the ICC and DIS Rules and has extensive experience with disputes under the ICC, ICDR, ICSID, DIS and the LCIA Arbitration Rules.

Margaretha’s practice focuses on corporate, construction, distribution and energy law matters. Her experience further extends to post M&A disputes, the determination of FRAND rates in license agreements in the telecommunications sector, gas price revision in long term contracts in the LNG sector as well as layer structured insurance policies in transactional matters.

Margaretha regularly publishes on topics related to international arbitration, particularly with a focus on post M&A disputes. She frequently appears as speaker at seminars.

Prior to working with Orrick, Margaretha was research assistant at the European Legal Studies Institute in Osnabrück where she wrote and presented briefing papers on behalf of and for the European Parliament (IMCO Comit



  • Complex Litigation & Dispute Resolution
  • Intellectual Property
  • Class Action Defense

Richard Krebs Managing Associate Complex Litigation & Dispute Resolution, Intellectual Property

Orange County

Rich Krebs is a litigator and trial lawyer with a passion for taking complex legal issues and making them interesting and comprehensible to clients, judges, and juries.  Clients know they can depend on Rich to be a fierce and loyal advocate and a steady hand to guide them through stressful conflicts.

A member of Orrick's Complex Litigation and Dispute Resolution practice, Rich has extensive business litigation experience in federal and state courts and private arbitration and mediation, including various business tort, breach of contract, insurance, licensing, fraud, securities, construction, intellectual property, and class action matters.  

Rich's practice covers all aspects of the litigation and dispute resolution process--from advising clients on whether to file suit, to resolving disputes through trial or settlement, and everything in between.  Rich's dogged determination, creativity, and relentless commitment to winning has repeatedly resulted in successful resolutions for his clients.  

Rich began his career with Irell & Manella in Los Angeles and also spent time with a litigation boutique in Houston before joining Orrick in 2018.  Rich lives in Newport Beach with his wife Rachel and his daughter Olivia.



  • Energy
  • Infrastructure

Keith Kriebel Senior Counsel Energy, Infrastructure

Washington, D.C.

Keith W. Kriebel is resident in the Washington, D.C., and Seattle offices and a member of the firm’s Energy and Infrastructure Group.

He focuses on project finance and energy and infrastructure transactions, particularly the development and financing of large infrastructure projects undertaken using public-private partnerships, as well as the development, financing, restructuring, acquisition, and sale of domestic and international energy projects, including thermal and renewable power projects, gas pipelines, ethanol facilities and utility assets. 

He is experienced in all aspects of project documentation, including design-build and engineering, procurement and construction contracts; operations and maintenance contracts; public-private partnership agreements; asset and share purchase agreements; partnership, shareholder, and other equity agreements; development agreements; turbine and other equipment supply agreements; taxable and tax-exempt financing documents; leases; power purchase agreements; fuel supply agreements; Rule 144A offerings; and privatization and bidding documents. Keith represents sponsors, lenders, contractors, utility offtakers and investors.

From 1983 through 1987, Keith served as a captain in the Office of Chief Counsel of the United States Army Corps of Engineers, where he focused on water and other civil works projects.



  • Public Finance

Leslie Conard Krusen Managing Associate Public Finance


Leslie Krusen is a lawyer in the Public Finance Department in Orrick's Seattle office.

Les is in Associate in the Public Finance practice group in Orrick’s Seattle office. He has served as bond counsel, disclosure counsel and underwriters’ counsel on public and privately placed tax-exempt and taxable debt issued by airports and ports, mass transit agencies, electric and water utilities, industrial development agencies and bond banks, higher education institutions and health care facilities. He has experience in advising clients in such financings in several states and U.S. territories, including Alaska, California, Guam, Nevada, New York, Oregon and Washington.

During the course of his practice, Les has worked on various types of financing structures, including standard general obligation and revenue bond financings, bond and grant anticipation financings, master trust indenture financings, conduit financings, pooled financings, variable rate bonds and current and advance refundings.

Prior to joining Orrick, Les was an associate in the Capital Markets practice group at Cadwalader, Wickersham & Taft in New York, where he represented major foreign and domestic banks and boutique financial institutions as issuers, depositors, loan sellers, underwriters, initial purchasers and placement agents in connection with approximately $20 billion of public and private offerings of commercial mortgage-backed securities and collateralized loan obligations.