OITtraining4 Published November 7, 2017 at × in Finding a job that fits you, pays well AND is meaningful is amazing. If you like freedom and change you might like operating a wastewater treatment plant. We’ll help you find out – and pay to train you. ← Previous Next → As OITs learn and develop, they are eligible for job progression and promotional opportunities throughout the utility. As OITs learn and develop, they are eligible for job progression and promotional opportunities throughout the utility.