 From 1995 and 1999, respectively, he has been active with the electronic journals "Theory and Applications of Categories" and "Homology, Homotopy and Applications", which he helped found.Since 2006, he has been involved with "Journal of Homotopy and Related Structures".His mathematical research interests range from algebraic topology and groupoids, to homology theory, category theory, mathematical biology, mathematical physics and higher-dimensional algebra.