Nigel J. Cutland is a Professor of Mathematics at the University of York where he researches logic and foundations of mathematics, stochastic analysis and nonstandard analysis and its applications.
Mauro Di Nasso is a Professor at the Università degli Studi, Pisa where he researches model theory and nonstandard analysis.
David A. Ross is a Professor at the University of Hawaii, Manoa where he researches nonstandard analysis and probability theory.