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Introduction to Arnold & Porter

Who we are

  • 100+ years offering clients practical, forward-thinking solutions
  • 159 lawyers ranked in Chambers USA, UK, Global, Europe, Latin America, Greater China Region, and Asia-Pacific
  • 15 offices in the U.S., EU, Asia, and the UK
  • 145 lawyers who have held positions in U.S.
    and European governments, and international organisations
  • 121 Fortune 250 companies that have chosen Arnold & Porter as outside counsel

The success of any law firm is dependent on the talent and professionalism of its lawyers and support staff. That is why we are committed to investing in the training and professional development of our trainee solicitors.

We are looking for enthusiastic and talented graduates from all backgrounds and cultures who share our commitment to excellence, want to be part of the continued growth of our London office, and want to become part of the next generation of leaders at our firm.

Providing our clients with excellent service is our number-one priority. Our lawyers need to be commercially minded and approachable, and be able to work with our clients as part of a team on complex and often high-profile legal issues. If you feel you can meet this challenge and want to work at an inclusive firm with a long tradition of pro bono and community support, we would like to hear from you.

Kathleen Harris

Partner, Head of London Office

Kathleen Harris

Sean Curran

Partner, Training Principal London Office

Sean Curran

Arnold & Porter’s London office is home to globally renowned regulatory, dispute resolution, and transactional teams. These teams work seamlessly across the firm’s U.S. and international offices, as well as a network of partner firms, to coordinate cross-border matters for our clients.

Many of our cases are multifaceted, needing strategic and collaborative problem solving. Our approach is different from so many other firms because we take a multidisciplinary approach across the industry sectors we serve and the issues we resolve.

Key sectors

  • Financial Services
  • Life Sciences
  • Media and Technology (TMT)
  • Private Equity

Global practices

  • Antitrust/Competition
  • Corporate & Finance
  • Commercial Litigation
  • Data Privacy
  • Debt Capital Markets
  • Employment
  • International Arbitration
  • Intellectual Property
  • Life Sciences Regulatory (EU)
  • Product Liability
  • UK Enforcement & Dispute Resolution

Market recognition

Our reputation in the legal market is evidenced by our track record in legal directories, league tables, and awards. Below are a selection of a few notable ones:

Chambers Top Ranked UK 2025

  • Commercial and Corporate Litigation
  • Financial Crime: Corporates
  • International Arbitration: Investor-State Arbitration
  • Life Sciences: Product Liability (Band 1)
  • Life Sciences: Regulatory (Band 1)

Legal500 UK 2025

  • Corporate & Commercial: EU & Competition
  • Corporate & Commercial: M&A: Lower Mid-Market
    Deals, £50M-£500M
  • Corporate & Commercial: Venture Capital
  • Crime, Fraud and Licensing: Fraud: White-Collar
    Crime (Advice to Individuals)
  • Dispute Resolution: Commercial Litigation:
    Premium
  • Dispute Resolution: Competition Litigation
  • Dispute Resolution: International Arbitration
  • Dispute Resolution: Public International Law
  • Finance: Debt Capital Markets
  • Human Resources: Employment: Employers
  • Industry Focus: Life Sciences and Healthcare • Insurance: Product Liability: Defendant
  • Investment Fund Formation and Management: Hedge Funds
  • Risk Advisory: Regulatory Investigations & Corporate Crime (Advice to Corporates)
  • TMT: Intellectual Property: Patents (Contentious and Non-Contentious)