1979 Visiting graduate student, Imperial College.
1977-1984 Assistant, UOP.
1984-1998 Lecturer, UOP.
1988-1994 Member of Technical Committee ΤΕ35 of Greek Standardization Office (Solar Energy National Standards).
1992 National Representative of Technical Committee ISO for Solar Energy.
1992-1994 Technical Expert for Car repair and Maintenance, Responsible for Design-Assessment of training modules (Euroqualification-ΕUROFORM).
1994-1996 Visiting Professor, Washington University, St. Louis, Missouri, U.S.A.
1994-now Design-Development of Mechanical-Biomedical Systems.
1998-2002 Assistant Professor, UOP.
2003–now, Associate Professor, UOP.
2007–2009 Construction Division Director, DMEA, UOP.
2009-now Health-Safety Committee member, UOP.
2009-now Collaboration between Johns Hopkins and UOP, committee member.
2003-now Hellenic NARIC, Academic Consultant.
2000-2001 and 2010-2011 DMEA. Senate elected-representative, UOP. Greek Engineers Technical Chamber and Courts, technical expert. Conference Scientific-Organizing Committees member.