Dr. Chen has developed novel engineering and managerial solutions through integrating environmental engineering with nano-/bio-technologies and advancing physical and numerical modeling methods. He has acted as PI or Co-PI in over 60 research projects and contracts from diverse sources nationally and internationally. He has authored or co-authored more than 470 technical publications including over 160 refereed journal papers and three books as well as eight patents/disclosures. He has supervised or co-supervised more than 300 highly qualified personnel (HQP) including 80 thesis-based graduate students and postdoctoral research fellows. His HQP have received a large number of awards and are well placed in the field of their training in academia, industry, government and NGOs worldwide.