Contract opportunities Check here often for contract opportunities with the Sanford Underground Research Facility and South Dakota Science and Technology Authority. Full Details Vendor Registration Guidelines To become a vendor for the Sanford Underground Research Facility or the SDSTA, please follow the directions on this page. Full Details Business Services Office and Directory Contractors, vendors and others can follow this page to find out how they can work with the Sanford Underground Research Facility. Full Details Visitor information All visitors must have an appointment prior to arrival Full Details Contractor training and site access Contractor can contact their project manager to schedule training and initiate the site access procedure. Full Details