P.J. Allisy-Roberts is the BIPM representative on the IAEA Secondary Standards Dosimetry Laboratories (SSDL) Scientific Committee which she currently chairs. She is a member of the Working Group for the UK National Measurements System (NMS) Programme for Ionizing Radiation and Acoustics and of the Comité scientifique rayonnements ionisants (LNE, France). She is a member of the editorial board of the Journal of Radiological Protection and of the Revue Française de Métrologie. She was elected to the Board of the European Federation of Medical Physicists where she currently serves as the European Matters Committee Chairman.

D.T. Burns is the BIPM representative at the ICRU, a member of the ICRU Committee on Fundamental Quantities and Units and a member of two ICRU Report Committees, on Key Data for Dosimetry and Operational Quantities for Radiation Protection. He is the BIPM contact person at the EURAMET-TC for ionizing radiation. He was elected to Fellowship of the Institute of Physics (United Kingdom of Great Britain and Northern Ireland) in 2011.

C. Kessler acted as the external peer reviewer for the dosimetry services at the CNEA, Argentina in January 2011.

G. Ratel is the BIPM representative at the International Committee for Radionuclide Metrology (ICRM) and is the President of the ICRM Nominating Committee. He also reviews papers for Metrologia.

P.J. Allisy-Roberts is Executive Secretary of the CCRI and its three Sections, the CCRI(III) in March 2011, CCRI(I) in May 2011, CCRI(II) and the CCRI itself in June 2011. In addition there have been eleven Working Group meetings during the last 18 months including the RMO WG in May 2011.

P.J. Allisy-Roberts and D.T. Burns are members of the KCWG(I), ADWG(I) and BSWG(I). The KCWG(I) and the ADWG(I) met together in May 2011 and C. Kessler and S. Picard also participated. D.T. Burns is also member of an ad hoc group evaluating the effect of excess charge on the value for W_air.

C. Michotte is the coordinator of the CCRI(II) Working Group on the SIR Transfer Instrument and a member of the KCWG(II) which met in November 2010, June and November 2011. She is also the contact person at the BIPM and rapporteur for the JCGM-WG1 that met in November 2010, May and November/December 2011.

G. Ratel is a member of the CCRI(II) working group on the extension of the SIR to beta emitters, which met on 5 November 2010 and 16 November 2011, the KCWG(II) which met on 4 November 2010, in June and November 2011, the UCWG(II), which met on 3 November 2010 prior to its merger with the KCWG(II) in June 2011, and the BqWG(II) which met on 2 November 2010, 18 April 2011 and 16 November 2011.

S. Picard is Executive Secretary of the Consultative Committee for Acoustics, Ultrasound and Vibration (CCAUV).