Derwyn is a competent chartered consultant with a significant wealth of experience in delivering flood risk, hydrological and hydrogeological advice for a wide range of development types. His success in delivering projects can be attributed to his scientific grounding in hydrological and hydrogeological processes, early identification of development constraints, proactive engagement of key stakeholders, understanding of interdisciplinary issues, commitment to producing high quality work and continuous work improvement process with adaption to changing regulations and guidance.