The Global Network of the World's Best Tax Minds
Complexity, solved.
A network of the world's leading tax lawyers — convened by invitation, organised by jurisdiction, distinguished by standing.
OECD
Founded by a former head of the OECD's tax work
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Jurisdictions within reach of one network
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PhD-level members
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Published papers
How we drive impact
Four ways the network works for you
Advisory
International Tax Structuring & Transfer Pricing
Where others stop, we go further. The questions clients bring us are rarely the ones with a clean answer in a textbook. That is precisely the work we are built for.
→Controversy
Tax Litigation & Dispute Resolution
Representation in tax audits, appeals, and international arbitration. Expert witness testimony and MAP support — trusted by governments and corporations alike.
→Pillar Two
GloBE Advisory
Impact assessment, safe-harbour analysis, group restructuring, and jurisdiction-by-jurisdiction implementation roadmaps.
→WTL International Tax Centre
Education & Research
Our fully online International Tax Centre runs courses including the CIOT-accredited course on Pillar Two. Academic mandate, working papers, and summits with leading universities and practitioners.
→Global
One network, every jurisdiction
Independent experts across Europe, the Americas, Asia-Pacific and Africa — matched to the question, not to a commercial map.
Where the rules were written
Founded by former OECD leadership. Our members drafted, negotiated and now interpret the framework.
London, the permanent seat
The Council sits in London — the administrative home of the network and the forum of choice for cross-border disputes.
Rigorous
Pillar Two, taught by its architects
The first CIOT-accredited Pillar Two Certificate — from the WTL International Tax Centre.
Analysis that survives scrutiny
Working papers, the annual Pillar Two review and the Council's consolidated implementation notes.
The doctoral standard
Every member holds, or is actively pursuing, a PhD in tax law or an equivalent academic distinction.
Independent
Experts, not brands
Clients engage named individuals with published credentials — not a letterhead.
Invitation only
Admission requires a unanimous Council decision. Membership cannot be purchased.
One team, no conflicts
Senior specialists assembled for your problem — free of the commercial conflicts of a global firm.
Executive Board
Led by practitioners of standing
Costas Savva
Partner, Transfer Pricing & Corporate Tax · PhD Cand. — Jurisdictional Expert Lawyer, EMEA
EMEA
Christos Theophilou
Partner, Transfer Pricing & Corporate Tax · PhD Cand. — Jurisdictional Expert Lawyer, EMEA
EMEA
Demis Ioannou
Partner, Transfer Pricing & Corporate Tax · PhD Cand. — Jurisdictional Expert Lawyer, EMEA
EMEA
News & Insights
The latest from the network
Analysis · 12 Apr 2026
Pillar Two at One Year: Early Lessons from European Implementation
Twelve months in, the first wave of European Pillar Two adopters have exposed both the strength of the GloBE framework and its sharpest edges.
Analysis · 4 Apr 2026
Transfer Pricing in the Age of Economic Substance: A Post-BEPS Framework
Substance, once a peripheral consideration, is now the central axis of the arm's length analysis. A practical, document-led framework for groups preparing for audit.
Press · 27 Mar 2026
WTL Launches CIOT-Accredited Pillar Two Certificate
The first Pillar Two training programme formally accredited by the Chartered Institute of Taxation begins in September 2026.
Tell us where the problem is. We'll bring the minds.
One conversation with a senior member — and the right team is assembled around your question.