Alan Frieze: Probabilistic combinatorics, theoretical computer science and operations research.
Brendan McKay: Combinatorics, graph theory and related software.
David Galvin: Graph theory, combinatorics and discrete probability.
Doron Zeilberger: Combinatorics and automatic formal identities proving.
Erik Demaine: Combinatorics, theory of computation and algorithms.
Erlendur S. Thorsteinsson: Algorithms, combinatorics and optimization.
Fan Chung Graham: Ramsey theory, spectral graph theory.
Gilles Zemor: Combinatorics, coding theory, cryptography and additive number theory.
Gregory Gutin: Graph theory and algorithms, combinatorial optimisation, linear and integer programming.
Herbert Wilf: Combinatorics and generating functions.
James Propp: Combinatorics, game theory, probability theory and dynamical systems.
Janos Pach: Combinatorial geometry.
Jaroslav Nesetril: Ramsey theory.
Jean-Sébastien Sereni: Graph theory, networks, combinatorics.
Jean-Yves Thibon: Algebraic combinatorics and representation theory .
John P. Morgan: Statistics and experimental designs.
Joshua Cooper: Combinatorial problems arising in number theory, algebraic geometry and coding theory.
Juergen Bierbrauer: Discrete mathematics and its interactions with geometry, cryptology and algorithms.
Leonard H. Soicher: Design theory and combinatorial computing.
Nantel Bergeron: Algebraic combinatorics.
Neil James Alexander Sloane: Combinatorics, integer sequences, codes, sphere packings, graphs and lattices.
Patrice Ossona de Mendez: Topological graph theory, combinatorics and pliant programming.
Peter Cameron: Permutation groups, and the finite or infinite structures on which they act.
Peter Dobcsanyi: Statistical design theory and its applications, LOWX software.
Quentin Stout: Discrete mathematics, statistics, algorithms and parallel computing.
Raul Banos: Optimization in complex problems and heuristics.
Rosemary A. Bailey: Experimental designs and statistics.
Said Amghibech: Spectral graph theory and algorithms.
Sebastien Roch: Applied probability and theoretical computer science.
Ted Spence: Classification of combinatorial designs.
Tom Leighton: Algorithms for network applications and cryptography.
Van H. Vu: Probabilistic methods, algorithms and algebraic methods in combinatorics.
Vašek Chvátal: Hamiltonian cycles, perfect graphs and combinatorial optimization.
Wesley Pegden: Combinatorics and graph theory.