Dejan is a building scientist with a background in heating, ventilation and air conditioning engineering and the extensive experience of monitoring and modelling work in the field of the built environment. In the last 20 years Dejan has led, co-led or significantly contributed to 60 research projects, and co-authored over 250 peer reviewed publications. 17 doctoral researchers graduated under his supervision. 

Dejan's research expertise include:

(a) modelling aspects of building performance analysis including the application and development of advanced modelling techniques utilizing performance data and simulation as a design driver

(b) monitoring aspects of building performance analysis in the context of health, comfort and cognitive performance

(c) building stock performance analysis including the development of semi-empirical bottom-up physically disaggregated building stock models as well as top-down statistical modelling studies.

Dejan’s significant and ongoing engagement with national or international partners in the public dissemination of his research efforts to the benefit of the society and community is summarised in the Research Excellence Framework 2021 (REF2021) Impact Case Study on Indoor Air Quality in Schools.