Sherrill & Associates has been providing the highest quality training and consulting services to the Industrial Ammonia Refrigeration industry for more than fifteen years.  Whether you need custom, site specific refrigeration operator and Hazmat training or you are looking for assistance with your PSM / RMP needs Sherrill & Associates can help you with an affordable, effective solution. Cllick here to check out a list of our clients and what some of them have to say about us.