• 1977-1982: Faculty of Mathematics, University of Craiova, Romania
• 1982-1990: High-school Mathematics teacher
• 1990-1992: Assistant, Department of Mathematics, University of Craiova, Romania
• 1992-1995: Lecturer, University of Craiova, Romania
• 1995-1998: Associate Professor, University of Craiova, Romania
• Since 1998: Full Professor, Department of Mathematics, University of Craiova, Romania
• Since 2007: Professorial Fellow, Institute of Mathematics "Simion Stoilow" of the Romanian Academy, Bucharest
• Since 2009: Senior Researcher, Nonlinear Analysis, Topology and Geometry Group, Institute of Mathematics, Physics and Mechanics, Ljubljana, Slovenia
• 2014-2017: Distinguished Adjunct Professor, King Abdulaziz University, Jeddah, Saudi Arabia
• Since 2014: Honorary Director of the Institute of Applied Mathematics, Harbin, China

Selected Visiting Professorships

• University of Uppsala (two weeks in October 1995)
• Politecnico di Milano (March 1996, with a CNR research grant)
• Freie Universität in Berlin (two weeks in May 1996)
• Aristotle University in Thessaloniki (June 1996)
• Leiden University (October and November 1996)
• Università Cattolica di Brescia (March 1997, with a CNR research grant)
• Aristotle University in Thessaloniki (May 15 - June 15, 1997)
• Universities of Sussex and Oxford (December 15, 1997 - February 15, 1998), with a Royal Society Research Fellowship
• 1998-2000: PAST Visiting Professor at the Laboratoire d’Analyse Numérique, Université Pierre et Marie Curie (Paris 6)
• Université Catholique de Louvain-la-Neuve (Belgium) in November 1998 with a FNRS research position
• University of Perugia (Nov. 15 - Dec. 15, 1999, with a CNR research grant)
• Université Pierre et Marie Curie (March 1 - May 31, 2001) with a CNRS research visiting position at the Laboratoire d’Analyse Numérique
• Université Catholique de Louvain-la-Neuve (Belgium) in October 2001 with a FNRS research position
• Université de Picardie “Jules Verne”, Amiens (February 2002)
• Université de Savoie-Chambéry (September 1 - November 30, 2002) with a CNRS research visiting position
• Université de Picardie “Jules Verne”, Amiens (February 2003)
• Université de Tunis El Manar (one week in April 2003)
• Mathematisches Institut, Universität Basel (ten days in May 2003)
• Institut Elie Cartan, Université Henri Poincaré Nancy I (June 2003)
• Université de Perpignan (July 2003)
• Université de Picardie “Jules Verne”, Amiens (February 2004)
• Université de Savoie-Chambéry (two weeks in March 2004)
• Université de Tunis El Manar (two weeks in April 2004)
• Université Catholique de Louvain (Belgium) in November 2004
• Université de Picardie “Jules Verne”, Amiens (February 2005)
• Universidad Complutense de Madrid (one week in March 2005)
• City University of Hong Kong (two weeks in April 2005)
• Université de Tunis El Manar (two weeks in May 2005)
• Université de Franche Comté and Université de Limoges (two weeks in November 2005)
• Université de Picardie “Jules Verne”, Amiens (February 2006)
• Université de Tunis El Manar (one week in May 2006)
• Université de Poitiers (June 2006)
• Université de Savoie-Chambéry (two weeks in August 2006)
• University of Perugia (November 2006)
• Université de Picardie “Jules Verne”, Amiens (February 2007)
• Université de Tunis El Manar (one week in March 2007)
• Université de Haute Alsace (May 2007)
• Université de La Rochelle (one week in July 2007)
• Approximation and Wavelets, Bilateral Workshop Romania-Germany, October 1-4, 2007, Königswinter, Germany
• Université Catholique de Louvain (Belgium) in December 2007
• Université de Picardie “Jules Verne”, Amiens (February 2008)
• University of Tours (May 2008)
• University of Perugia (two weeks in June 2008)
• University of Ljubljana (July-September 2008)
• City University of Hong Kong (one week in December 2008)
• Université de Picardie “Jules Verne”, Amiens (February 2009)
• Université de Tunis El Manar (one week in April 2009)
• University of Rzeszów, Poland (one week in May 2009)
• University of Ljubljana (one week in May 2009)
• Université de La Rochelle (one week in September 2009)
• Université de Picardie “Jules Verne”, Amiens (February 2010)
• University of Rousse, Bulgaria (one week in April 2010)
• University of Messina (one week in April 2010)
• University Autonoma, Madrid (one week in June 2010)
• Institut Henri Poincaré, Paris (one week in November 2010)
• Université de Tunis El Manar (one week in January 2011)
• Université de Picardie “Jules Verne”, Amiens (May 2011)
• University of Oxford (one week in November 2011)
• Université de Monastir (one week in March 2012)
• Université de Poitiers (one week in March 2012)
• Jagiellonian and AGH University of Science and Technology of Krakow (one week in May 2012)
• University of Perugia (June 2012)
• Université de Picardie “Jules Verne”, Amiens (November 2012)
• Universities of Catania and Reggio Calabria (two weeks in January 2013)
• Université de Besancon (March 2013)
• Université de Poitiers (April 2013)
• ICTP Trieste (one week in May 2013)
• King Abdulaziz University, Jeddah, Saudi Arabia (one week in September 2013)
• Universities of Reggio Calabria and Messina (one week in October 2013)
• Université de Picardie “Jules Verne”, Amiens (November 2013)
• Isaac Newton Institute, Cambridge, Programme Free Boundary Problems and Related Topics (6 January-4 July 2014)
• University of Ljubljana (one week in January 2014)
• Université Cadi Ayyad, Marrakech (one week in March 2014)
• King Abdulaziz University, Jeddah, Saudi Arabia (two weeks in April 2014)
• University of Pisa (one week in May 2014)
• Recent Trends in Nonlinear Partial Differential Equations and Applications Celebrating Enzo Mitidieri’s 60th Birthday, University of Trieste, 28–30 May 2014
• Université de Picardie “Jules Verne”, Amiens (November 2014)
• King Abdulaziz University, Jeddah, Saudi Arabia (two weeks in December 2014)
• University of Perugia (one week in January 2015)
• Senior Research Fellow, City University of Hong Kong (February 2015)
• King Abdulaziz University, Jeddah, Saudi Arabia (two weeks in April 2015)
• King Saud University, Riyadh, Saudi Arabia (one week in May 2015)
• Isaac Newton Institute, Cambridge, Programme Coupling Geometric PDEs with Physics for Cell Morphology, Motility and Pattern Formation (13 July-18 December 2015)
• Senior Research Fellow, City University of Hong Kong (February 2016)

Selected invited lectures and talks

• University of Wisconsin, Madison, USA (June 1991), on the occasion of the Conference Mary Ellen Rudin and Her Work
• Hyères, France (May 1993) at the 25ème Congrès National d’Analyse Numérique
• Almeria, Spain (June 1993) at the Summer School organized by Universidad Computense from Madrid
• Université Paris 6, Laboratoire d’Analyse Numérique (1994 and 1995)
• ENS Paris (May 1994), at the 2nd French-Romanian Colloquium
• University of Uppsala (October 1995)
• Universities of Brescia, Trento, Padova, Milano, Politecnico di Torino and Politecnico di Milano (March 1996)
• Freie Universität from Berlin (two talks in May 1996)
• Plenary lecture at the 3rd French-Romanian Colloquium (September 1996)
• Universities of Leiden (5 talks), Delft, Louvain-la-Neuve, Namur, Aachen (2 talks) and Rouen (October-November 1997)
• Universities of Brescia, Povo-Trento, Milano, Roma - Tor Vergata and Politecnico di Milano (March 1997)
• University of Delaware (June 3-7, 1997): ISAAC’97, the First International Congress of the International Society for Analysis, its Applications and Computation, with the paper “Perturbation techniques for hemivariational eigenvalue problems”
• University of Sussex at Brighton (February 1998)
• Université de Limoges (May 1998, June 1999, May 2000 and November 2002)
• Université Catholique de Louvain and Université Libre de Bruxelles (November 1998, April 2000, October 2001)
• Universités de Montpellier (April 1999) et de Nancy (June 1999, May 2001)
• Universities of Rome Tor-Vergata, Politecnico Milano, Brescia, Trento-Povo and Perugia (Nov.-Dec. 1999)
• Plenary lecture at the 5th French-Romanian Colloquium (August 2000)
• Romanian Academy of Sciences (February 2001)
• Université de Savoie-Chambéry (April 2001 and October 2002)
• Université de Paris 6 (Analyse Numérique and Théorie du Potentiel, May 2001)
• Université de Picardie-Amiens (May 2001 and three talks in February 2002)
• Université de Strasbourg (May 2001)
• CIMPA-UNESCO-CEU School on Functional Analysis, Partial Differential Equations and Numerical Analysis, Budapest, Central-European University, September 2002 (10 courses on Functional Analysis).
• Université de Picardie-Amiens (February 2003)
• Université de Tunis El Manar (April 2003, April 2004, May 2005, May 2006)
• Mathematisches Institut, Universität Basel (June 2003)
• Université de Perpignan (July 2003)
• 21st IFIP TC 7 Conference on System Modelling and Optimization, Sophia Antipolis, France, July 21-25, 2003. Organized by the International Federation for Information Processing.
• Université de Picardie-Amiens (February 2004)
• Fifth European Conference on Elliptic and Parabolic Problems: A Special Tribute to the Work of Haim Brezis, Gaeta, May 30 - June 3, 2004
• Fourth European Congress of Mathematics, Stockholm, June 27 - July 2, 2004
• Université Catholique de Louvain (two talks in November 2004)
• Université de Picardie-Amiens (February 2005)
• Universidad Complutense de Madrid (March 2005)
• City University of Hong Kong (April 2005)
• Université de Franche Comté (November 2005)
• Université d'Orléans (February 2006)
• Institute of Mathematics “Simion Stoilow” of the Romanian Academy (March 2006)
• Université de La Rochelle (June 2006)
• 6th International Conference on Dynamical Systems and Differential Equations (American Institute of Mathematical Sciences), Poitiers, June 2006
• Conférence Francophone sur la Modélisation Mathématique en Biologie et en Médecine, Craiova, July 12-14, 2006
• Plenary lecture at the 8th French-Romanian Colloquium, Chambéry, August 2006
• International Conference on Applied Analysis and Differential Equations, Iasi, September 4-9, 2006
• Central European University, Budapest, September 2006
• Workshop on Potential Analysis, Institute of Mathematics “Simion Stoilow” of the Romanian Academy, Bucharest (October 2006)
• Politecnico di Milano and Universities of Perugia (3 talks), La Sapienza (Rome 1), Tor Vergata (Rome 2), Naples, Milano, Florence, Pise and Bologna (November 2006)
• Plenary lecture at the 15th Colloque de la Société Mathématique de Tunisie (Sousse, 19-22 March 2007)
• Plenary lecture at the International Conference on Nonlinear Operators, Differential Equations and Applications, Cluj, July 4-8, 2007
• Summer School “Critical Point Theory and Applications”, Cluj, July 9-13, 2007
• International Conference on Theory and Applications in Mathematics and Informatics, Alba Iulia, August 30 - September 2, 2007
• Bilateral Workshop Romania-Germany Approximation and Wavelets, Königswinter, Germany, October 1-4, 2007
• 9th Conference on Mathematical Analysis and Applications, Iasi, October 26-27, 2007
• Second Workshop Series on Applied Mathematics, Pitesti, November 2-4, 2007
• Second Romanian-German Round Table for Research, Bucharest, November 8-9, 2007
• The Future of Mathematical Education in Europe, Lisbon, December 17-18, 2007
• Liouville Theorems and Detours, INdAM Conference, Cortona, May 18-25, 2008
• Third Workshop Series on Mathematics: Potential Analysis, Pitesti, October 15, 2008
• International Conference on Partial Differential Equations and Applications - in honour of Professor Philippe G. Ciarlet's 70th birthday, City University, Hong Kong, December 5-8, 2008
• Romania-Germany Workshop Nonlinear Analysis and Mathematical Physics, University Lucian Blaga of Sibiu, May 14-16, 2009
• Panstwowa Wyzsza Szkola Zawodowa, Jaroslaw, May 20, 2009 (announcement)
• University of Rzeszów, May 21, 2009
• 4th Workshop Series on Mathematics, IMAR Bucharest, November 2009
• University Ovidius of Constanta, May 2009
• Université de Picardie-Amiens (February 2010)
• International Workshop Nonlinear Difference and Differential Equations and their Applications, University of Rousse, Bulgaria (April 2010)
• International Workshop Variational, Topological and Set-Valued Methods For Nonlinear Differential Problems, University of Messina, Italy (April 2010)
• Workshop on Asymptotic Analysis and Stochastic Methods for Heterogeneous Media, Alba Iulia (June 2010)
• International Conference Variable Exponent Analysis, Oulu, Finland, (June 2010)
• XIVth Conference of the Romanian Mathematical Society, Alba Iulia (October 2010)
• Institute of Mathematics Simion Stoilow of the Romanian Academy (October 2010)
• International Conference on Nonlinear Operators, Differential Equations and Applications (ICNODEA 2011), Cluj, July 5-8, 2011
• Partial Differential Equations in Mathematical Physics and their Numerical Approximation, Levico Terme, Trento, Italy, September 4-9, 2011
• University Ovidius of Constanta, October 2011
• Oxford PDE Seminar, University of Oxford (November 2011)
• University of Poitiers (March 2012)
• University of Monastir (March 2012)
• 18e Colloque de la Société Mathématique de Tunisie, Mahdia, 19-22 March 2012
• Jagiellonian University of Krakow (two talks in May 2012)
• AGH University of Science and Technology of Krakow (two talks in May 2012)
• Mini-symposium Variational Methods and Nonlinear PDEs, 7th European Conference on Elliptic and Parabolic Problems, Gaeta, May 20--25, 2012
• International Conference in Honor of the 60th anniversary of Professor Patrizia Pucci, University of Perugia, May 28-June 1, 2012
• Mini-courses in Mathematical Analysis, University of Padova, June 18-22, 2012
• 10th International Conference on Fixed Point Theory and its Applications, Cluj, July 9-15, 2012
• International Winter School on Mathematical Fluid Dynamics, Levico Terme, Trento, Italy, December 16-21, 2012
• University of Catania (January 2013)
• Workshop Meeting on Mathematics, University of Reggio Calabria (January 2013)
• University of Besancon (March 2013)
• University of Poitiers (April 2013)
• Mini-courses in Nonlinear Partial Differential Equations, Women in Mathematics, Mathematics of Planet Earth, Summer School ICTP Trieste, May 27 – June 1, 2013
• International Workshop on Variational Problems and PDE’s, September 2–6, 2013, Sao Paulo, Brazil
• King Abdulaziz University, Jeddah, Saudi Arabia (September 2013)
• Seminars on Nonlinear Analysis, Reggio Calabria (October 2013)
• International School on Computational Commutative Algebra and Algebraic Geometry, Messina (October 2013)
• Programme Free Boundary Problems and Related Topics, Isaac Newton Institute, Cambridge, 6 January–4 July, 2014
• University of East Anglia (January 2014)
• Institute Isaac Newton, University of Cambridge (January 2014)
• University of Swansea (January 2014)
• University of Cardiff (January 2014)
• University of Nottingham (January 2014)
• Plenary lecture at the International Conference Recent Advances in PDEs and Applications (on occasion of Professor Hugo Beirao da Veiga’s 70th birthday), Levico Terme, Trento, Italy, February 17-21, 2014
• University Cadi Ayyad, Marrakech (March 2014)
• King Abdulaziz University, Jeddah, Saudi Arabia (April 2014)
• University of Pisa (May 2014)
• Mini-symposium Recent Trends in Nonlinear Analysis and its Applications, 8th European Conference on Elliptic and Parabolic Problems, Gaeta, May 26–30, 2014
• Plenary lecture at the International Conference Recent Trends in Nonlinear Partial Differential Equations and Applications Celebrating Enzo Mitidieri’s 60th Birthday, University of Trieste, 28–30 May 2014
• International Workshop on Nonlinear Analysis and Applications to Economics dedicated to Professor Dusan Repovs on his 60th birthday, University of Craiova, 25 September 2014
• Invited speaker at the conference Recent Trends on Nonlinear Phenomena, Reggio Calabria (November 2014)
• University of Perugia (January 2015)
• King Abdulaziz University, Jeddah, Saudi Arabia (April 2015)
• King Saud University, Riyadh, Saudi Arabia (May 2015)
• Invited Speaker at the Conference Equilibrium and Optimization Methodology in Finance and Economics, King Saud University, Riyadh, Saudi Arabia, November 9-11, 2015

Professional Organisations and Citations