The Fiber Sources and Applications Group at NIST, Boulder is seeking one or more individuals for projects focused on the application of optical frequency combs to atmospheric sensing for measurement of air quality and greenhouse gases. Our group works to develop and apply open-path dual-comb spectroscopy (DCS) as new tool for atmospheric measurements over kilometer to multi-kilometer scale of many trace gases that are critical to climate change and air quality. We have demonstrated open-path DCS in the near-infrared spectral region for a variety of applications including determining greenhouse gases emissions in urban areas, oil/gas production regions, and in an agricultural setting. In addition, we have developed a new system in the mid-infrared spectral region that can measure more ga