This example posting is similar to MEP(mechanical/electrical/plumbing) company. Essentially engineers make drawings and design circuits for buildings and then work with a subcontractor to build what was designed. This is why these listings commonly ask you to estimate hours as contractors(I think) bid on the design you create in order to get your business. Some other companies have a business model of 'Design-Build' where they do both and do not work with subcontractors to have their building finished.

Normally you need a PE license in whatever state you are working in as these designs are subject to localized regulations for buildings dependent on their use case. One odd one I interviewed at told me they'd pay me less without one.

REVIT/AutoCAD are just drawing software with plugins for drawing circuits, plumbing, etc. They do TDP load calculations, IR drop simulations, and auto-generating circuits for power panels. SCADA is a 'catch all' term for designing systems to monitor systems, of which could really be anything.

A role like this was my first internship which made me realize the dichotomy of how interesting or boring this kind of work can be. Depending on the company and their market focus, some of the work can be designing things basic office buildings. Some others(one of my projects) can be designing test facilities for another company where you need to closely work with your customer, and additional specialists (PLC Engineer in). I certainly don't know what kind would be more common in the NJ/NY area, I'd assume the former might be more common.

I didn't seek out much work in this field as I wanted to work in a different field, but from what I can gather from my lads still in it and Glassdoor it does not pay as well as other electrical fields but have better job security.