TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractPetrobras, one of the world's leading oil and gas producers, strives to also be a leader in environmental, health, and safety (EHS) performance. A series of accidents in 2000 and 2001 have prompted Petrobras to totally rethink and rebuild its EHS function and means of delivering EHS assurance. The results to date include bold changes, including a re-organization of the corporate EHS function, an EHS strategy and integration of objectives and EHS targets into its corporate strategy/business plan, and development of a series of target, world-class management programs and capital improvement projects. This paper highlights some of the advances to date and how they have been realized.