Reader in the Optimization and OR group in the School of Mathematics at the University of Edinburgh.

My main research interest is in developing algorithmic and computational techniques for solving large scale linear programming (LP) problems on both serial and parallel computers. For many years this was focused on the revised simplex method but, recently, I have switched my attention to work which will lead to the development of novel algorithms. A consequential research interest is the application of these techniques in other areas of computational optimization and linear algebra.

I have best paper prizes for Computational Optimization and Applications (2005, 2013 and 2015) and Mathematical Programming Computation (2018).

In collaboration with my PhD students Ivet Galabova and Michael Feldmeier, and our developer Leona Gottwald, I am managing the development of the high performance open-source software linear optimization software HiGHS.

I have more than 25 years of consultancy experience.