She then worked in the field of mathematics in the Economic Department of the University of Tartu and Department of Mathematics of the Tallinn University of Technology until 1984, when she began working at the Design Institute of Cultural Monuments as a photographer.
Apart from these many Indian students and researchers are working currently in University of Tartu and Tallinn University of Technology.
Kregel has served since 2006 as Professor of Finance and Development at Tallinn University of Technology, Tallinn, Estonia.
She graduated from the Tallinn University of Technology and worked as an architect in the organs of the State Planning Commission, then as a technician and technologist in design institute in Tartu.
In 1950 he finished his architecture studies at the Tallinn Polytechnical Institute.
After some research positions at the University of Tartu, he was elected, in 2002, aged 28, to a full professorship and chair in Public Management and European Studies at Tallinn University of Technology's Ragnar Nurkse School of Innovation and Governance (as it is now called), which since 2004, he heads.
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Additional contributors are the DECHEMA, the FIZ CHEMIE (Berlin), the Technical University in Tallinn, and others.