Many organizations are adopting site reliability engineering to improve the dependability of their production infrastructure and operations (I&O) environments. This means more than simply renaming systems administrator roles and calling them site reliability engineers (SREs). Google first designed this approach with a handbook that defined a set of practices focused on iteratively improving production systems. Enterprises rely on a core set of tenets while customizing the practices for their organizations. This report lists the core tenets, a job description, and key recommendations for putting the SRE role into practice at your enterprise.