About Quadriga Tax
About Siegfried Kenswil
Siegfried G. Kenswil LL.M. is an international tax lawyer with nearly two decades of experience in cross-border taxation. Through Quadriga, he provides independent expertise, research and training in international tax, combining legal clarity with technical depth.
With a background in international and energy-sector taxation, he combi
Siegfried G. Kenswil LL.M. is an international tax lawyer with nearly two decades of experience in cross-border taxation. Through Quadriga, he provides independent expertise, research and training in international tax, combining legal clarity with technical depth.
With a background in international and energy-sector taxation, he combines legal precision with a deep understanding of how fiscal, regulatory and commercial considerations interact in cross-border situations.
Through Quadriga, he focuses on independent expertise, research, training and publications in international taxation, providing clear, well-grounded and defensible insights for complex global challenges.
Training & Publications
At Quadriga, knowledge transfer forms the core of our work.
We deliver focused training programmes and executive briefings on petroleum taxation, international tax architecture, stabilisation mechanisms and the design of fiscal policy in resource-rich economies.
Quadriga’s research output includes specialised publications such as The Surin
At Quadriga, knowledge transfer forms the core of our work.
We deliver focused training programmes and executive briefings on petroleum taxation, international tax architecture, stabilisation mechanisms and the design of fiscal policy in resource-rich economies.
Quadriga’s research output includes specialised publications such as The Surinamese Production Sharing Contract, the first in-depth study of Suriname’s petroleum legal and fiscal regime.