March 1996 – August 1996: Physics Department, University of Wales, College of Cardiff, Gravitational Wave Data Analysis Group, under the supervision of Prof. B. Schutz (now Director of the Max Planck Institute for Gravitational Physics -Albert Einstein Institute- Potsdam, Berlin, Germany)
Summer 2013: Visiting Professor with the Department of Electrical and Computer Engineering, University of California at San Diego, for a joint research project with Prof. Massimo Franceschetti (J-1 visa held)
Since 2021, he has been a frequent visitor to the WINS Lab (Wireless Information and Network Sciences Laboratory) of LIDS (Laboratory for Information & Decision Systems) at the MIT (Massachusetts Institute of Technology), where he presently holds the Research Affiliate appointment