Our Staff

The Center is headed by a director, who has primary responsibility for leadership and management of activities and resources, and resident advisors who deliver advice and training in their respective areas of competence. the Center also relies heavily on short-term experts, and has a small team of support staff.

Mr. Mario Mansour: Director

Prior to joining METAC, Mr. Mario Mansour was Deputy Chief of the Tax Policy Division at the International Monetary Fund (IMF), where he coordinated the provision of technical assistance advice in tax policy to IMF member countries and contributed to the IMF analytical agenda. Mario has over 25 years of experience, has advised on taxation in over 40 countries of all income levels, and has published on a wide range of tax issues. Before joining the IMF in 2004, Mario worked as a tax analyst at the Canadian Department of Finance, and with a private Canadian consultancy where he led technical assistance projects in the Middle East and the Eastern Caribbean.





Mr. Didier Casier: Banking Supervision Advisor

Mr. Didier Casier is a Belgian national with 25 years of central banking experience. He has in-depth knowledge and experience in banking regulation and supervision, gained in the National Bank of Belgium and as a resident advisor of the International Monetary Fund. His specialization includes implementation of Basel II and III frameworks, risk-based supervision, consolidated supervision, dealing with weak banks, supervisory interventions and international financial reporting standards. During 2016-2019, as the IMF banking regulation and supervision advisor in Ukraine, Didier supported the efforts of the National Bank of Ukraine in implementing far reaching banking sector reforms and developing the institutional capacity in banking regulation and supervision. He animated numerous workshops to the National Bank of Ukraine school of banking supervision, and hands-on training to the banking inspectors and supervisors during the performance of their off-site and on-site supervision activities.


Mr. Issam Al Sammak: Real Sector Statistics Advisor

Mr. Issam Alsammak, a Canadian national, has joined METAC in October 2018, as new resident advisor on Real Sector Statistics with over 12 years of experience in national accounts. Prior to joining METAC, Mr. Alsammak was Assistant Director at Statistics Canada’s Industry Accounts Division, were he was primarily responsible for the compilation of the annual national and provincial supply and use tables; the reconciliation of the income and expenditure accounts with the benchmark estimates; and the development of other statistical products such as Canada’s transportation satellite account. Mr. Alsammak professional experience also included delivering technical assistance to countries in the Caribbean as part of a Canada-funded project to advance national accounts statistics in the region. Mr. Alsammak is a graduate of McGill University in Montreal, Canada.


Mr. Benoit Wiest: Public Financial Management Advisor

Mr. Benoit Wiest joined METAC on October 1. He has 15 years of experience in various PFM areas. Previously, he was an economist at the IMF’s Fiscal Affairs Department, where he coordinated and delivered PFM TA in Africa and South East Asia. He also held the position of IMF fiscal economist for Côte d’Ivoire. Before he joined the IMF, Mr. Wiest held various positions at the Financial Audit team at the French Court of Accounts, and was an auditor in the private sector. He holds a master’s degree in PFM from Paris-Dauphine university and is an alumnus of Sciences-Po Paris and Paris 2 Panthéon–Assas.


Mr. Jonas Frank: Public Financial Management Advisor

Mr. Jonas Frank, a German national, joined METAC on November 1. He has 20 years of professional experience on a wide range of PFM issues. Previously, he was Deputy Head of the Macroeconomic Support Division at the Swiss Secretariat of Economic Affairs, overseeing operations in MENA, Eastern Europe, and Central Asia. He also worked for ten years at the World Bank, focusing on public investment management and fiscal decentralization, and co-led the Decentralization and Subnational Finance Thematic Group. Mr. Frank holds a Doctorate in Economics and Social Sciences from the University of Potsdam (Germany).


Ms. Fadia Sakr: Revenue Administration Advisor

Ms. Fadia Sakr, a Lebanese national, joined METAC on September 14, 2020. She has more than 19 years of professional experience in revenue administration, of which 17 with the tax administration of Lebanon, and covering a wide range of taxation issues, including tax policy design, compliance, audit, and strategic planning. In the past two years, Ms. Sakr was a resident expert with the Tax Authority of the Sultanate of Oman, where she helped in the regulatory and legislative areas, organisation structure, development of information technology to support tax procedures, development of risk management strategies, and providing training to staff of the Authority. In addition, Ms. Sakr brings to METAC important communication skills as she has worked with parliamentarians and bilateral and international organisations, has a deep knowledge of the MENA region, has private sector experience working part-time for big consulting firms on tax reforms in the GCC region, and language skills as she is fluent in Arabic, French and English.


Ms. Anita Semaani: Office Manager

Ms. Anita Semaani, a Lebanese national, joined METAC in June 2016. She has over 18 years of experience in executive office management, including accounting, procurement and human resources functions. Before Joining METAC, Anita worked in Kuwait, Lebanon, Switzerland, and the United Arab Emirates. Her last assignment was Operations Manager for Development Alternatives Incorporation (DAI), which provided assistance to Lebanon’s Ministry of Energy and Water. Anita is fluent in Arabic and English, and has good knowledge of French.