Bernard McGarvey retired as an Engineering Fellow at Eli Lilly and Company at the end of 2017. He has a B.E. and Ph.D. in Chemical Engineering from University College Dublin, Ireland. He spent 34 years working for Eli Lilly and Company at various locations in Ireland and the USA. He has held a variety of roles in process control and process engineering over this time, as well as time in corporate manufacturing. His main interest is in the application of First Principles thinking to improve engineering decision making and problem solving at Eli Lilly, covering both process development and manufacturing. Towards the end of his career he has applied this approach to pharmaceutical cold chain distribution leading to improvements in both the speed and quality of decision making in this area.