Bruno Altieri Herschel Instrument and Calibration Scientist (PACS) ESA I joined ESA in 1992, first on ISO at ESTEC and moved down to ESAC (formerly 'VILSPA') in 1994. In 1999 I joined the XMM-Newton Science Operations Centre and since 2005 the Herschel Science Centre as instrument and calibration scientist on the PACS instrument. My original main scientific interest is gravitational lensing by clusters of galaxies, first in the optical then in the mid-infrared with the ISOCAM camera on the ISO GT ARCS programme (P.I.: L.Metcalfe), studying the background lensed population as well as star formation in the clusters of galaxies themselves. I also took part in some deep X-ray surveys with XMM-Newton. I am now preparing similar observations, deep surveys and lensing clusters, with the upcoming PACS/Herschel in the far-infrared as co-I in the PACS Extragalactic Key Programme (PEP, P.I.: D. Lutz) I am also involved : 1/ for several years in the XMMLSS, the XMM Large Scale Survey , which main scientific goal is to map the large scale structures as outlined by galaxy clusters and groups of galaxies out to a redshift of 1. http://vela.astro.ulg.ac.be/themes/spatial/xmm/LSS/index_e.html and 2/ in the the XMM-Newton slew survey.