[3][4] He is also known for devising weighted reference counting, an approach to computer memory management that is suitable for use in distributed systems.

[10] He received his PhD in mathematics from The Open University in 2015; his thesis, On the growth of permutation classes, was supervised by Robert Brignall.

[11][12][13] While employed by Pitney Bowes, he was a major contributor to the development of the FreeType text rendering library.

[3] He established that the growth rate of a monotone grid class of permutations is equal to the square of the spectral radius of a related bipartite graph.

[3][4] In the Acknowledgements sections of his journal articles, he often includes the Latin phrase Soli Deo gloria.