Jonathan Armstrong
Partner, Punter Southall Law
Professional Roles
Jonathan is an experienced lawyer at Punter Southall Law in London with a concentration on compliance & technology. He is also a Director of board training company L-EV8 and LegalTech business Breach Navigator.
His practice includes advising multinational companies on risk and compliance across Europe. Jonathan gives legal and compliance advice to household name corporations on:
- Prevention (e.g. putting in place policies and procedures);
- Training (including state of the art video learning); and
- Cure (such as internal investigations and dealing with regulatory authorities).
Client Work
Jonathan has handled legal matters in more than 60 countries covering a wide range of compliance issues. Clients include Fortune 250 organizations and household names in manufacturing, technology, healthcare, luxury goods, automotive, construction and financial services. He has conducted a wide range of investigations of various shapes and sizes (some as a result of whistleblowers), worked on data breaches (including major ransomware attacks), a request to appear before a UK Parliamentary enquiry, UK Bribery Act 2010, slavery, ESG & supply chain issues, helped businesses move sales online or enter new markets and managed ethics & compliance code implementation.
AI Expertise
Jonathan is regarded as an acknowledged expert in AI. He served on the New York State Bar Association’s AI Task Force looking at the impact of AI on law and regulation. The Task Force produced one of the first comprehensive reports on AI risk in April 2024. He now sits on the NYSBA AI & Emerging Technologies Committee to continue that work. Jonathan also sits on the Law Society AI Group.
Publications & Speaking Engagements
Jonathan is co-author of the textbook on technology law, “Managing Risk: Technology & Communications”. In addition to being a lawyer, Jonathan is a Fellow of The Chartered Institute of Marketing. He has spoken at conferences in the US, Japan, Canada, China, Brazil, Singapore, Vietnam, Mexico, South Korea, the Middle East and across Europe.
Recognition & Awards
Jonathan qualified as a lawyer in 1991 & has focused on technology and compliance matters for more than 30 years. He has been selected as one of the Thomson Reuters stand-out lawyers for 2026 – an honor bestowed on him every year since the survey began. Jonathan has been ranked as the 14th most influential figure in data security worldwide. Jonathan is listed as a Super Lawyer & has been listed in Legal Experts since 2002. Jonathan’s work is also featured in this year’s Legal 500 who say that his team is “Well-positioned to advise on compliance mandates and high-stakes data breaches.”
Jonathan is the former trustee of a children’s music charity and the longstanding Co-Chair of the New York State Bar Association’s Rapid Response Taskforce which has led the response to world events in a number of countries including Afghanistan, France, Pakistan, Poland & Ukraine.