Dr. I. Peshko worked in Universities and National Labs (Ukraine, Germany, Poland, and Canada), in Government Agencies (Canada, Ukraine), and in private companies (Poland, Canada, USA, Ukraine). In the USA he prepared proposals, worked as PI and co-researcher in the grants of NIH, DoD (DARPA, AF, Navy, Army), NASA, NSF, NIH, DOT, DOE, NOAA, etc.

Dr. I. Peshko is the reviewer of the Journal of Non-Crystalline Solids (Elsevier publishing).