Professor Trevor Ireland is a world leader in geo- and cosmochemistry who developed fundamental infrastructure for isotopic microanalysis that he then used to make breakthrough contributions to understanding the origin and evolution of Earth, Solar System, and other stellar systems. No other contemporary scientist has contributed so broadly and so importantly across such a wide range of fields. Professor Ireland has been the primary driver in developing the second- and third-generation SHRIMP ion microprobes, which are among the most productive instruments in geochronology over many decades, and will likely remain so for the foreseeable future.