Installs, maintains, calibrates, troubleshoots, makes program changes and corrections, repairs and overhauls all power house and supervisory systems, indicating, recording, telemetering, and controlling instruments (electric, electronic, mechanical, pneumatic, hydraulic) used to measure and control variables, such as pressure, flow, temperature, motion, force, and chemical composition. Veolia in North America is the top-ranked environmental company in the United States for three consecutive years, and the countrys largest private water operator and technology provider as well as hazardous waste and pollution treatment leader.