David Siesage
Image of David Siesage

David Siesage

Senior Associate

Email

david.siesage@aoshearman.com

Phone

+44 20 3088 2006

Offices

London

V-CARD
David helps clients to navigate and resolve their most complex disputes, regularly advising on technical and multi-jurisdictional matters, with a particular focus on the financial services, technology, and energy sectors.

He has been involved in contentious situations spanning litigation, judicial review, regulatory investigations, and arbitration, and has spent time on secondment to a large international bank. His interests include AI safety, public law rights, sovereign immunity, political/electoral law, and conflicts of laws.

David is both a qualified solicitor and an accredited civil mediator. He has practised in London, Paris, and Amsterdam.

Expertise

Industries

Experience

Pro bono

  • Advising Bail For Immigration Detainees in its intervention in R (SM) v Lord Chancellor, a successful judicial review in relation to immigration detainees' access to legal advice. 
  • Advising disability benefits claimants in Employment Support Allowance and Personal Independence Payment appeal proceedings in the First-tier Tribunal. 
  • Assisting Fair Trials International with the preparation of a multi-jurisdictional report on use of evidence obtained via torture. 
  • Conducting research and interviews on technology in courts to contribute to JUSTICE's Understanding Courts report. 
  • Advising individuals at the Battersea Legal Advice Centre on private disputes, housing issues, and access to justice.
Disclaimer
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.