Los Alamos County (LAC) consists of the towns of Los Alamos, White Rock, and the scientific research facility of Los Alamos National Laboratory (LANL) in New Mexico, and this region has experienced three mass evacuation emergencies. All evacuations were due to wildfires. The problem was that the Los Alamos Fire Department (LAFD) did not have an operational procedure for mass evacuation, sheltering, and re-entry actions which could impact citizen and firefighter safety. Evacuation and mass care are designated as one of the primary roles assigned to the fire department through the county's all-hazard emergency response plan. The purpose of this applied research project was to develop a mass evacuation, shelter, and re-entry draft operational procedure, to give direction to the company officer and to collaborate with LAC unified action partners. Action methodology guided the following questions; (a) What are the laws, regulations, and standards that local and state agencies use for mass evacuations? (b) What operational procedures do other fire agencies and LAC unified action partners have in place to respond to mass evacuation emergencies? (c) What are the responsibilities and resources required of LAFD to support mass evacuation and sheltering emergencies? (d) What barriers have been identified by other agencies for operational procedures for mass evacuation emergencies? The procedures included: (a) examining local documentation, (b) researching barriers, (c) reviewing email interviews, (d) survey responses, and (e) ascertaining what elements were applicable to the identified jurisdiction in a draft operational procedure in a mass evacuation emergency. Recommendations include the formation of a jurisdictional working group to coordinate efforts, sectors to include demographic information for responders, and an ongoing communications plan throughout the incident. A draft operational procedure for Mass Evacuation, Sheltering and Re-Entry was developed.