No, I'm the lead integrator at a small-to-medium-sized company. Which means when an engineer brings me in on a project, I have a decent amount of influence on the software and controls hardware we use.
The customer may specify a PLC manufacturer or a particular SCADA system, but unless we're expanding an existing system we usually have a lot of leeway. I know this stuff better than the engineer does (that's my job, after all), so my recommendations are usually accepted.