He is President of the International Chromosome and Genome Society, a Fellow of the Royal College of Pathologists, the Royal Society of Biology and the Royal Society of Arts, Manufacture and Commerce. He sits on the faculty of CoGen (controversies in genetics) and has previously sat on the board of the Preimplantation Genetic Diagnosis International Society (PGDIS), organising its annual meeting in 2014. Darren is a world leader in cytogenetics. He performed the first successful cytogenetic preimplantation genetic diagnosis (sexing of IVF embryos) and, more recently, played a significant role in the development of Karyomapping a universal test for genetic disease in IVF, an approach he now applies to cattle. In a 30+ year scientific research career he has co-authored over 200 scientific publications, mainly on the cytogenetics of reproduction and evolution, most recently providing insight into the karyotypes of dinosaurs.