People

Spencer Kau Managing Associate

Silicon Valley

Hannah Kaufman Senior Associate

Washington, D.C.

Hannah is deeply committed to pro bono work, focusing her representation on supporting women and children seeking legal immigration status in the United States. 

Gohshun Kawamura Of Counsel

Tokyo

In addition, he is involved in establishing schemes and negotiating contracts for the corporate PPAs of non-FIT renewable energy projects, as well as preparing on-site PPAs and general terms and conditions for electricity retailers.

He is the co-author of Orrick’s “Japan Renewables Alert".

Prior to joining Orrick Tokyo Office, he was an assistant judge at the Tokyo District Court and the Matsuyama District Court, where he gained experiences in a variety of cases, including civil, administrative and criminal matters.

Daniel Patrick Kearney Senior Associate

New York

Daniel focuses on technology transactions, including drafting and negotiating a variety of commercial and intellectual property focused agreements, and represents technology companies in a variety of areas, including stand-alone licensing, software as a service, and software development arrangements, and corporate matters, mergers & acquisitions, and financings.

Before joining Orrick, Daniel was an attorney in the IP & Tech Transactions group at Davis Polk & Wardwell, working on a variety of intellectual property, data privacy and security, and transactional matters.

Before becoming a lawyer, Daniel spent several years prosecuting patent applications as a registered patent agent.

Gerald Keeler Forensic Accountant

San Francisco

Alexandra Keenan Managing Associate

London

She is also a member of the firm's AI & Privacy Committee which focuses on researching and writing about various legal issues in the field of artificial intelligence.

Alexandra joined the firm as a trainee in 2018.

Jennifer Keighley Partner

New York

Jennifer has co-authored numerous briefs and dispositive motions in federal and state courts of appeals and trial courts, and at both the certiorari and merits stage in the U.S. Supreme Court. Her experience covers a wide range of substantive areas, including constitutional law and statutory interpretation, labor and employment, intellectual property, healthcare law, privacy law, class action defense, securities litigation, and complex commercial litigation. She has deep expertise in appeals and critical motions in financial services litigation, including representing financial institutions in major RMBS cases and in putative and certified class actions, and she is currently representing Goldman Sachs, JPMorgan, and other underwriters of initial and secondary offerings in multiple securities class actions. Jennifer also maintains an active pro bono practice focusing on the areas of immigrant and women’s rights.

While at Orrick, Jennifer has argued and won two appeals. She argued and won an appeal on behalf of OpenTV raising issues of contract interpretation in the California Court of Appeal. She also argued and won an appeal on behalf of an immigration client seeking relief under the Convention Against Torture in the U.S. Court of Appeals for the Ninth Circuit.

Prior to joining Orrick, Jennifer was a Staff Attorney at a national nonprofit and an associate at a boutique firm. In her prior roles, she participated in all aspects of litigation, arguing and briefing dispositive motions, examining multiple witnesses at trial, and taking depositions of both fact and expert witnesses. Jennifer graduated from Yale Law School, where she was an Editor on the Yale Law Journal. Immediately following law school, she served as a law clerk to Judge Kim McLane Wardlaw of the United States Court of Appeals for the Ninth Circuit.

Jonathan Keil Of Counsel

London

With over 20 years of experience across leading UK and US law firms, a major global financial institution, and a fast-growing fintech scale-up, Jonathan has a broad perspective on cross-border transactions and market challenges. His experience includes structuring and negotiating multiple types of financing facilities, managing risk, and supporting clients through every stage of the deal process.

Don Keller Head of Corporate Development

Silicon Valley

In 2020 and 2021, Don founded and served as CEO of Joinder, a SaaS engagement platform that provides a system of record for legal projects and files/documents, which was acquired by Brightflag.

Prior to founding Joinder, Don spent his legal career as a corporate partner at Orrick and Venture law Group advising high growth technology companies, public companies, venture capital firms and investment banks. He advised clients on more than 60 public offerings, 75 acquisition transactions and several hundred venture financings.

Chambers USA recognized Don for his work, noting he is "valued for his knowledge of venture capital firms and his strength in advising technology companies on public offerings, acquisition transactions and venture financings. One client insists that 'I would not dream of starting a company without him as my outside counsel.'"

Don held many leadership positions at Orrick. Don most recently led Orrick’s Technology Sector, which is one of the three focus areas (along with energy and finance) for the firm. Don is a former member of Orrick’s Board of Directors, served as head of the firm’s global corporate practice, served as head of the firm’s Silicon Valley Office and served as co-head of the firm's diversity efforts.

Don also previously served for many years on the Executive Committee of Venture Law Group.

Don recently represented companies being sold in the following transactions: Wavefront to VMware; Nervana to Intel; TOA to Oracle; Altiscale to SAP; Sailthru to Campaign Monitor; Twin Prime to Salesforce; 3Scale to Red Hat; Vendavo to Francisco Partners; FoodyDirect to Goldbelly; Yieldex to AppNexus; and LS9 to Renewable Energy Group.

Don led transactions for Google (Nasdaq GS: GOOG), Oracle (Nasdaq GS: ORCL), Tibco (Nasdaq GS: TIBX), Adaptec (Nasdaq GS: ADPT), Shutterfly (Nasdaq GS: SFLY), Martha Stewart Living Omnimedia (NYSE:MSO), Sum Total Systems (Nasdaq GS: SUMT) and Rambus (Nasdaq GS: RMBS).  Don also represented many investment banking clients in public offering transactions, including representing Goldman, Sachs & Co. in offerings for many issuers.

Don also is a past member of the Board of Overseers of Boston College Law School. 

Vivian Keller Managing Associate

Washington, D.C.

Vivian has experience in a wide variety of patent matters, including litigation in district courts and at the ITC, inter partes review proceedings, and ex parte reexamination proceedings. Vivian also has experience working with various types of technologies, including semiconductors, artificial intelligence, wireless and wired networks, consumer electronics, cloud computing, and automotives.  She also leverages her background in patent prosecution in her litigation practice and offers the ability to communicate effectively with inventors and expert witnesses.

Vivian has previously held roles in which she not only handled patent litigation and patent prosecution matters, but also worked on trademark and copyright prosecution matters, trademark and copyright litigation matters. During law school, Vivian was a judicial extern to Judge Timothy C. Batten, Sr. of the U.S. District Court for the Northern District of Georgia. 

Bart Kempf Partner

Washington, D.C.

Bart’s experience includes advising project developers, financial institutions, private equity firms, state and local governments, and public and private companies on matters involving environmental and natural resources laws, including:

• Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA or Superfund);
• National Environmental Policy Act (NEPA);
• Endangered Species Act and other wildlife laws;
• National Historic Preservation Act and tribal issues;
• Clean Water Act;
• Clean Air Act;
• Resource Conservation and Recovery Act (RCRA);
• Federal Insecticide, Fungicide, and Rodenticide Act; and
• Federal Food, Drug, and Cosmetic Act.

Bart’s work includes transactions, project development and permitting, litigation, agency proceedings, and enforcement actions. He represents clients in matters involving federal and state agencies, including the U.S. EPA, the U.S. Army Corps of Engineers, the U.S. Fish and Wildlife Service, the U.S. Department of Agriculture, and state and local environmental and resource protection agencies.

Bart has also handled numerous matters involving federal, state, and local economic incentives, grants, and loan guarantees. In particular, he has advised energy and commercial development clients on applying for and obtaining incentives for the redevelopment of brownfield sites.

Bart maintains an active pro bono practice that has included matters involving conservation, human trafficking, and family law. Prior to joining Orrick, Bart practiced at an international firm and a national firm focused on environmental law.  He also served as senior counsel on the staff of the U.S. Senate Committee on Agriculture, Nutrition and Forestry, focusing on environmental, energy, and climate issues.

Bart is described by Chambers USA as “highly fluent in the intricacies of EPA policymaking and possesses a wealth of knowledge about the U.S. market.”

Anastasia Kerdock Counsel

New York

Anastasia advises and defends clients with respect to a wide range of employment matters including:

• Allegations of discrimination, harassment, and retaliation
• Pattern or practice, class, and collective actions
• Diversity and inclusion initiatives and pay equity

Anastasia also counsels clients on a variety of legal issues and best practices related to the employee life cycle, including:

• Recruitment
• Hiring
• Performance management
• Separation of employment
• Negotiation of employment and severance agreements