I'm a very well experienced industrial engineer in Spain specialist in control systems and I have dedicated 15 years of my life in PLC & SCADA systems (also DCS). Several years in Siemens systems from S7-200/300/400 some years ago to S7-1200/1500 nowadays, and from ProTool to WinCC or WinCC Flexible. I have programmed PLCs in several ways, from little automation projects to large systems including advanced regulation, communication with some other devices (sometimes Siemens, sometimes not), logging & storing data in PLC to send to the SCADA asynchronously and so on. In other words, not always classical control systems but sophisticated ones.
If I had to define myself, I'd say I'm a systems integrator, because I've been in projects where I had to communicate PLCs, machines, PC (high level programming), etc. And mostly in realtime and systems running continuously (we say here 24x7).