What engineering discipline would you recommend new students specialize in (or avoid) given the current/future job market?

I’ve been working in construction since I graduated 5 years ago. I’ve gradually realized I don't want to do this for the next 3 decades, but I feel stuck. Is it too late to switch engineering disciplines without destroying my career progression?

How do you know when it’s time to leave a job vs. stick it out and push through a rough patch? For me it comes down to whether the core reasons I took the role are still intact. If the work is still interesting and the people are decent, a rough patch is survivable. But if I’m dreading Mondays every single week, that’s usually a signal worth listening to.

I recently switched to salary, and my workload exploded. Suddenly, everything is "urgent," so I'm working 2–3 hours of unpaid overtime at home every night. The company is billing the client for my extra hours, but I'm not seeing any of it. How do I bring this up with management? I'd rather not keep working for free.

Do you think engineers spend enough time thinking about the user experience of internal tools? I’ve seen teams tolerate painful internal systems that they’d never ship to customers.