The Energy Sciences Network (ESnet) is the Office of Science’s high-performance network user facility, delivering highly-reliable data transport capabilities optimized for the requirements of large-scale science. In essence, ESnet is the circulatory system that enables the DOE science mission. ESnet is stewarded by the Advanced Scientific Computing Research Program, and managed and operated by the Scientific Networking Division at Lawrence Berkeley National Laboratory. ESnet interconnects the DOE’s national laboratory system, dozens of other DOE sites, and ~200 research and commercial networks around the world—enabling tens of thousands of scientists at DOE laboratories and academic institutions across the country to transfer vast data streams and access remote research resources in real-time. ESnet exists to provide the specialized networking infrastructure and services required by the national laboratories, large science collaborations, and the DOE research community. ESnet provides the high-bandwidth, reliable connections that enable many thousands of the nation’s scientists to collaborate on some of the world's most important scientific challenges including energy, biosciences, materials, and the origins of the universe. ESnet is recognized nationally and internationally as one of the premier networks for the research community. ESnet has a long track record of innovation in network design, performance, and service delivery, highlighted by major contributions that are utilized by other research networks around the world. ESnet’s vision is that scientific progress will be completely unconstrained by the physical location of instruments, people, computational resources, or data. This document provides an overview of the potential of the next generation network, ESnet6, to advance the DOE mission and accelerate the pace of discovery. For current openings: go.lbl.gov/esnet-careers