It is with great sadness that we report the news that Dr John W. Lyons died on 14 March 2024.

Dr Lyons was elected to the CIPM in 1990 and played an important role in expanding the work of the CIPM to address measurements in chemistry.

Following his appointment as NIST Director, he attended his first CIPM meeting in September 1990. During that session he was appointed Chair of the ad hoc Working Group set up to advise the CIPM on “whether or not the BIPM should have a significant role in addressing the problem of providing uniformity and traceability in chemical and physico-chemical measurements”. The report produced by Dr Lyons and submitted to the 82nd meeting of the CIPM in September 1993, led the CIPM to establish a Consultative Committee for Chemistry, now called the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM). The Committee has gone on to become highly active and the largest within the BIPM thanks to the foresight and leadership of Dr Lyons.

An obituary was published by the NIST on 11 April 2024.