Open XDMoD is an open source tool to facilitate the management of high performance computing resources. It is widely deployed at academic, industrial and governmental HPC centers. Open XDMoD’s management capabilities include monitoring standard metrics such as utilization, providing quality of service metrics designed to proactively identify underperforming system hardware and software, and reporting job level performance data for every job running on the HPC system without the need to recompile applications. Open XDMoD is designed to meet the following objectives: (1) provide the user community with a tool to more effectively and efficiently use their allocations and optimize their use of HPC resources, (2) provide operational staff with the ability to monitor, diagnose, and tune system performance as well as measure the performance of all applications running on their system, (3) provide software developers with the ability to easily obtain detailed analysis of application performance to aid in optimizing code performance, (4) provide stakeholders with a diagnostic tool to facilitate HPC planning and analysis, and (5) provide metrics to help measure scientific impact. In addition, analyses of the operational characteristics of the HPC environment can be carried out at different levels of granularity, including job, user, or on a system-wide basis.