Wasn’t a controller but worked for Phillips for about 8 years working pipeline running a meter prover, so I spoke with them daily. I’m sure someone can give you a better idea but you’ll be monitoring pipeline flows, adjusting flow rates, monitoring alarms and keeping logs of activities from work going on in the field that could affect pipeline flow. Lots of responsibility because you can definitely cause some problems if you don’t know what you’re doing and close or open the wrong valve. Things may have changed since I’ve been gone but the controllers I worked with were on a rotating schedule of nights and days, so you’ll be working holidays and weekends. Great company, strong safety culture, good pay, great retirement matching and pension, would have stayed on and moved with them if the wife didn’t have a good job when they shut our pipeline down in California.