With staff of 1,000, the Division covers a broad range of subject matter, including oversight of environmental investigations, lead poisoning, injury prevention, occupational health, food safety, childcare, radiation control, recreational and drinking water quality, air quality, climate health, vector control, veterinary public health and pest control. To be appointed to Assignment Level II and above, candidates must have: A doctorate degree from an accredited college or university with specialization in an appropriate field of physical, biological, environmental or social science and one year of full-time experience in a responsible supervisory, administrative or research capacity in the appropriate field of specialization; or.