David Stokes is Director and Principal Consultant with Convalido Consulting Ltd, a specialist consultancy specialising in providing strategic IT compliance and computer systems consultancy to a number of international clients. Convalido's client base ranges from small software suppliers to the Life Sciences industry, to Top Ten pharmaceutical and medical device companies, all of whom rely on David's significant experience and ability to interpret regulations and regulatory/industry guidance in the context of the latest information technologies (www.convalido.com) Starting his career as a process control engineer, David has 30+ years’ experience in R&D, manufacturing, sales and marketing, process control, regulatory compliance, information systems and computer systems validation. He is a long-time supporter of GAMP® and ISPE. He is a member of the GAMP UK Steering Committee and the Pharmaceutical Engineering Editorial Review Board and has written or contributed to a number of articles in Pharmaceutical Engineering. In recent years and has spoken on various subjects at ISPE events in the UK, the US, Belgium, Denmark, Germany, France, China and India. David chaired the original GAMP® Testing SIG, which led to the first version of the “Testing of GxP Systems” Good Practice Guide. He was also heavily involved in the preparation of the 2nd Edition of the guide where amongst other topics is he specifically coordinating the output of the GAMP® Americas and GAMP® D-A-CH Test Automation Special Interest Groups. He has also contributed to or reviewed a significant number of other ISPE GAMP good practice guides.