Vector Psychometric Group, LLC (VPG) was founded in 2007 as a psychometric consulting company and, in 2010, expanded its mission to offer state-of-the art psychometric, statistical, and data collection software. In 2020, VPG cemented its commitment to lead the market of advanced psychometric and data analytic software with the acquisition of Scientific Software International, Inc. In 2021, VPG further expanded its mission to incorporate top-tier qualitative research services to provide our clients with a “one-stop” shop for all phases of measurement development and modeling. Today, VPG comprises two business units, VPG Health and SSI, offering both contract research services and software focused on the statistical modeling of health, behavioral, and educational outcomes.