It has been said that the private security industry which includes both contract and proprietary forces is much larger than the total of public safety/police departments.
Granted that there are a significant number of individuals in this group that would not pass muster but if selected volunteers could be recruited and trained there are many things they could do. ie. assist in traffic control, dispatch duties, couriers, first aid, shelter setups and maintenance to name a few. Some agencies and institutions provide training now but if there were standard regulations on screening of applicants and training requirements a valuable pool of personnel could be utilized.