David is the Principal Clinical Biochemist with a specific role in the management and development of services within the Reference Measurement Laboratory since 2002. With over 35 years laboratory experience, David has a keen interest in metrology and measurement traceability. He is currently the JCTLM Database Working Group (JCTLM-DBWG) review team leader for electrolytes and blood gases. He is a JCTLM-DBWG review team member for both the non-peptide hormones group and metabolites and substrates group. He is also a member of the JCTLM-WG-TEP (Traceability: Education and Promotion). He is also a member of the Association for Clinical Biochemistry and Laboratory Medicine (ACB) Liquid Chromatography Tandem Mass Spectrometry Special Interest Group.