The Missouri Department of Natural Resources has the Air Pollution Control Program that requires certification for anyone dealing with asbestos:
The program provides certification information, applications, technical bulletins and regulations.
The Missouri Department of Health and Senior Services licenses lead abatement under its Environmental Regulations and Licensure Unit. This includes anyone dealing with lead removal or storage
Lead training providers.
The following trades are licensed and regulated by the Division of Professional Registration under the Missouri Department of Economic Development
Consumers are advised to also check for municipal license requirements as contractor laws can differ from county to county. It is also advisable to double check with the state’s requirements before hiring a contractor.