Survey Our Servicemembers Act or the SOS Act This bill directs the Department of Veterans Affairs (VA) to contract with an experienced nongovernment entity to conduct an annual survey to determine the experiences of veterans in obtaining hospital care and medical services at each VA medical facility. Such surveys must be conducted over a five-year period and must include questions related to the experiences of veterans in seeking care at both VA and non-VA facilities. The VA shall make the survey results publicly available on its website.