Management & Staff

IEO staff comprises the Director and 11 other staff, including a Deputy Director, nine professional staff and two administrative assistants. A majority of the IEO staff is recruited from outside the IMF. IEO also engages consultants with particular expertise for specific evaluation projects.

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Charles Collyns


Mr. Collyns joined the IEO as Director in February 2017, after working as Managing Director and Chief Economist at the Institute of International Finance for 3 1/2 years. He served as Assistant Secretary for International Finance at the US Treasury Department from February 2010 to July 2013. Prior to joining Treasury, he worked at the IMF, including as Deputy Director in the Research Department responsible for the World Economic Outlook and Deputy Director in the Western Hemisphere Department. He holds a doctorate in economics from the University of Oxford and a BA from the University of Cambridge.

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Ruben Lamdany

Deputy Director

Before joining the IEO in 2006, he was Director at the World Bank Institute, which delivers capacity-building programs in developing countries. Prior World Bank assignments included senior positions in its Evaluation Unit, as well as in the units responsible for operations in the Balkans, Russia and Ukraine. At different times, he held positions at the International Monetary Fund and in the Bank of Israel, and at the Planning Institute of Jamaica. Mr. Lamdany holds a Ph.D. in Economics from Columbia University and degrees in Mathematics and Economics from the Hebrew University in Jerusalem.

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Prakash Loungani

Advisor and Senior Personnel Manager

Mr. Loungani joined the IEO in June 2017 after 30 years of experience at the IMF and in the Federal Reserve System and academia. He is adjunct Professor of Management at Vanderbilt University and also teaches a popular course at the IMF on Economics for Non-Economists. He is the author of well-rated academic articles in macroeconomics and international economics. His previous jobs at the IMF include: chair of the Jobs & Growth group set up by IMF management; chief of the Development Macroeconomics division; Senior Personnel and Budget Manager for the Research Department; mission chief for Grenada; and advisor to the IMF’s Communications Director. Mr. Loungani holds a Ph.D. in economics from the University of Rochester.

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Jun Kim


Mr. Kim joined the IEO in January 2018 after working at the IMF for 16 years. He served as a Deputy Governor of the Bank of Korea from March 2011 to December 2014 when he was on leave from the IMF. Prior to joining the IMF, he worked at the Korea Development Institute as a senior research fellow and chief of the Macroeconomics division, served as Senior Counsellor to the Minister of Finance of Korea, and taught at the University of California, Santa Cruz, as an assistant professor. Mr. Kim holds a Ph.D. in economics from Brown University and a BA from Seoul National University.

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Reginald Darius

Lead Evaluator

Mr. Darius joined the IEO in December 2017. Prior to joining the IEO he was the Director of Economic Policy at the Commonwealth Secretariat. Mr. Darius is a former Permanent Secretary in the Ministry of Finance of Saint Lucia and Senior Economist at the IMF. He holds a Ph.D. in Economics from the University of Warwick and a Masters in Economics from the University of Cambridge.

Louellen Stedman

Louellen Stedman

Lead Evaluator

Ms. Stedman joined the IEO in November 2008. She previously worked for over seventeen years at the U.S. Treasury, including as Director of the Office of International Monetary Policy and Financial Attaché in London. She holds an MPA from the Woodrow Wilson School at Princeton University.

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Miguel de Las Casas

Senior Economist

Mr. de Las Casas joined the IEO in April 2013. Between 2009 and 2012 he was Advisor to Executive Director at the IMF Executive Board. He previously worked for ten years at the International Affairs Department of the Banco de España. He holds a Masters in International Relations from IE Business School.

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Jung Kim

Senior Economist

Ms. Kim joined the IEO in 2017 from the IMF’s Strategy, Policy and Review Department where she was a senior economist focusing on low income country issues and the IMF’s surveillance policies. She also worked as an economist in the Bank of Korea and as a consultant at the World Bank. She received her Ph.D. in Economics from University of Warwick, U.K.

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Jianping Zhou

Senior Economist

Before joining the IEO, Ms. Zhou was a senior economist in the IMF’s Monetary and Capital Market Department and mission chief for Morocco’s FSAP. Prior IMF assignments include working in the Asia & Pacific, European, and Middle East & Central Asia Departments. She holds a Ph.D. in Economics from Georgetown University and a B.S. degree in Mathematics from Zhejiang University.