This site provides a listing of independent, 3rd party consultants recognized for their expertise in specific areas of legionella consulting.  Third party consultants are those which have no conflict of interest with the consulting services that they provide. From a liability standpoint lawyers typically recommend using independent, 3rd party consultants. Also some government and non-government contracts may require independent, 3rd party consultants.  Consultants listed on this site do not provide any products or services, such as water treatment chemicals, cleaning services, etc which would conflict with the above or delivery of unbiased consulting work.