Full Professor in the Warsaw School of Economics, head of the Chair of Economics 1 where he had graduated from in 1984 and where he defended his doctoral (1988) and post-doctoral (1996) dissertation, and received the title of Professor (2004). Between 1984 and 1993 worked in the Institute of Econometry, and since 1993 – in the Chair of Economics 1. Lectures, i.a., in Macroeconomics, labor economics, pension economics, economic policy, and previously also in econometry and forecasting. Cooperated with foreign universities and institutes (i.a. Erasmus University in Rotterdam, London School of Economics, IFO Economic Research Institute in Munich) and OECD.

Participated in a number of international research projects. Member of the European Economic Association and of the European Association of Labour Economists, where in the years 1990-1997 he worked as member of the board of directors. Research Fellow in William Davidson Institute (University of Michigan), in IZA Institute for the Study on Labor (Bonn) and in Netspar (Network for Studies on Pension, Ageing and Retirement, University of Tilburg).

Co-author of a project for the new Polish pension system which replaced the previous system back in 1999.

Author of many national and foreign publications, mainly in the area of labor economics and pension economics, including System emerytalny (Pension system, PWE, Warsaw 2003).