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Rhys David

Rhys is a Chartered Engineer with over 25 years' experience in safety and design assurance. After graduating he worked as a design engineer supporting reactor operations for the UK Atomic Energy Authority, and then moved into engineering consultancy in 1986, concentrating on system safety, dependability and assurance.  Since 2005 Rhys has been a Partner and Director of Safety Assurance Services Ltd.  

Rhys has multi-discipline experience relevant to mechanical, electrical/electronic as well as software intensive and information systems throughout their lifecycle. Rhys has produced Safety Cases on a wide range of complex systems in different domains, including diving systems, medical systems, defence platforms and systems and decision support tools.  

Rhys has built on experience as a Safety Practitioner writing Safety Cases, to acting as Independent Safety Assessor/Auditor and Adviser, developing Safety Management Systems and undertaking strategic studies, particularly in the defence sector.  He was the principal author for MoD’s Project-Oriented Safety Management System.  Rhys was the sole external member of the MoD’s Safety Improvement Working Group, following the Nimrod disaster, and subsequently has helped MoD develop the Safety competence of its staff from Board level to safety practitioner level.  

Rhys has an Engineering degree from Cambridge University, is a Fellow of the Safety and Reliability Society (SaRS) and was a founding member (2000) of the IMechE’s “Engineering for Safety” Working Group.  He also represents IMechE and SaRS on the UK Independent Safety Assurance Working Group and on the IET’s Working Group on Competence for Safety Practitioners.  Rhys has organised several successful conferences and seminars for Safety Practitioners and published papers for IMechE, SaRS, SCSC, MoD, IET and other professional bodies.



Steve Brooks

Steve is a Chartered Engineer with over 20 years' experience in the Safety and ARM fields. Steve began his career as a student apprentice with Marconi Communications Systems Limited.  On graduating with an Electronic Engineering degree from Southampton University, Steve joined SHL Limited, part of CAP Scientific, where he worked for 2 years as a software engineer.  In 1989 Steve joined Safety and Reliability Consultants (SRC) Limited.  In 2000 Steve joined Safety Assurance Services (SAS) Ltd to expand the company’s capabilities and during this period Steve attained chartered engineer status with the IET.

Steve’s main area of expertise is in the safety of electronics-based systems although he has experience in safety-related software assessment and development.  Steve has worked mainly in the field of safety, formulating safety programmes and undertaking safety assessments producing Safety Cases for both new and in-service systems. Steve also has experience in risk analysis, bid assessment and preparation, software development and research work.

In particular Steve’s related experience includes producing Safety Management Plans and the setting up Safety Management Systems in accordance with current safety policy; conducting Hazard Analysis and Risk Assessment including software safety assessments; conducting detailed Fault Tree Analysis (FTA) to assess compliance against safety requirements; managing safety risk through the use of Hazard Logs; producing auditable Safety Case Part 1, Part 2 and Part 3 documents and Safety Appraisals and performing the Independent Safety Auditor / Advisor roles.


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