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Meet the team

The TIWB Secretariat performs the match-making function of Experts, operates a database of qualified Experts, promotes the Programmes, monitors and evaluates deployments and produces tools to support the process. Additionally, the TIWB Secretariat supports and reports to the Governing Board.

Rusudan Kemularia

Head of TIWB Secretariat, OECD

2, rue André Pascal
75775 Paris Cedex 16, France
 

Tel: +33 1 45 24 78 42
E-mail: rusudan.kemularia@tiwb.org 

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Ms. Rusudan Kemularia, a Georgian national, has spent over a decade working in international tax and fiscal policy. In 2019, Ms. Kemularia joined the Tax Inspectors Without Borders team in Paris to lead a review of the initiative. Prior to joining the OECD, Ms. Kemularia was Georgia’s Vice Minister of Finance from 2010-2012, leading tax reforms and work in all areas of public finance, including tax and customs policy and administration, as well as development of public services. In addition to her ministerial role, she was appointed as a Secretary to the Parliament and Co-Chair of the Tax Dispute Resolution Counsel. She negotiated numerous double taxation avoidance treaties and implemented anti-avoidance regulations (e.g. transfer pricing rules) in Georgia.

From 2008-2009, Ms. Kemularia worked as a Rector of the Finance Academy, as well as Head of the Legal and Financial Policy Departments. She worked as General Counsel of the Millennium Challenge Corporation-funded project from 2012-2019. In addition to her extensive professional career, Ms. Kemularia has been an Assistant Professor at the Caucasus School of Law and Tbilisi State University.

Ms. Kemularia holds a Master’s degree in public policy from University of Oxford and an LL.M in public law from Bielefeld University. She is a qualified tax lawyer, holding a law diploma from Tbilisi State University. Ms. Kemularia is a recipient of the prestigious Oxford - Weidenfeld Hoffmann Scholarship.

Ahtseham R. Khan

Project Manager - TIWB, UNDP

One United Nations Plaza, DC1-1950
New York, NY, 10017, USA 

Tel: +1 (212) 906-6417
E-mail: ahtesham.khan@undp.org 

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Ahtesham R. Khan is Project Manager in the Finance Sector Hub, UNDP, and manages the TIWB initiative for UNDP. He has extensive experience in fiscal policies, tax administration and domestic resource mobilisation. As Officer on Special Duty in the Ministry of Finance, Government of India he worked on BEPS negotiations and tax arbitration cases. Ahtesham was Deputy Director of the Indian Tax Administration whereby he investigated illicit financial flows and cross border tax evasion. As Assistant Commissioner, he conducted tax audits and dealt with complex issues related to tax laws. He has also worked on the Local Currency Bond Markets project of the World Bank and the United Nations Handbook on Taxation of the Extractive Industries published by the Financing for Sustainable Development office, UN-DESA.

Ahtesham has done Electrical Engineering in under-graduation and has dual Masters - Masters in Taxation and Business Laws from NALSAR University, India and Masters in Public Administration with specialization in Advanced Policy and Economic Analysis from SIPA, Columbia University. He is recipient of the prestigious JJ/World Bank Scholarship.

 

Kalale Mambwe

Project Manager, TIWB Secretariat, OECD

2, rue André Pascal
75775 Paris Cedex 16, France
 

Tel: +33 1 45 24 75 21

E-mail: kalale.mambwe@tiwb.org

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Kalale Mambwe, a Zambian-born economist, joined the OECD as the Tax Inspectors Without Borders (TIWB) Project Manager on 1 September 2022.

Kalale has extensive experience in tax audit and policy having worked previously as an auditor on complex transfer pricing cases in various sectors and with a particular focus on addressing some of the most pressing Base Erosion and Profit Shifting (BEPS) challenges facing developing countries. As a manager in the international taxation unit at the Zambia Revenue Authority, Kalale contributed significantly to the introduction of Zambia’s transfer pricing regulations and refinement of its transfer pricing rules.

Kalale also served as a technical committee member of the Future of Resource Taxation, a Project started as an initiative by the Africa Tax Administration Forum (ATAF) and The Intergovernmental Forum on Mining, Minerals, Metals and Sustainable Development (IGF) aimed at taking stock of mining tax systems and consideration of the alternative futures for the extractive industry. Kalale also worked alongside ATAF in providing assistance to other African tax administration’s to help build capacity in transfer pricing.

Kalale has provided training and mentoring to numerous officials of Ministries of Finance, Revenue Authorities and Central Banks of various countries through the Macroeconomic and Financial Management Institute of Eastern and Southern Africa (MEFMI) on international tax and transfer pricing. Before Joining the TIWB, Kalale represented Zambia as a delegate at the OECD Inclusive Framework on Pillar One and Pillar Two.

Kalale has an honours degree in Economics from the University of Namibia and an MBA from the University of Zambia.

Melanie Mathis

Project Co-ordinator, TIWB Secretariat

2, rue André Pascal
75775 Paris Cedex 16, France 

Tel: +33 1 45 24 81 94
E-mail: melanie.mathis@tiwb.org

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Melanie Mathis has been an integral member of the TIWB Secretariat since July 2016. As Project Co-ordinator, she is responsible for overall co-ordination of the initiative, including the construction and maintenance of the TIWB website and database, operations management, events and technical assistance. She is bilingual in English and French and leads the social media outreach for Tax Inspectors Without Borders. 

Ms. Mathis holds a Bachelor of Arts from New York University. Her professional experience includes working as a Legal Assistant and Office Manager for an international law firm in Beverly Hills, California, as well as previously Cultural Affairs Co-ordinator for New York University in France.