Real-world range can vary based on temperature, elevation, speed, etc. Without knowing the details of that 120 miles, it's hard to say. But you can calculate what you'll actually use with the car's navigation system or a third-party site like EVTripPlanner, and that's pretty accurate. I'd probably be comfortable with a 10% buffer for getting home. Your 120 miles might take 150 "miles" of range, which would still leave you with plenty of margin. Note that the lowest-range model they sell currently is the 70 at 230 miles official range. The maximum is the 90D with about 290 miles official range.

Exterior 120V outlets are pretty common, so another option would be to plug into one of those while at work. That makes for slow charging, but you could add another 40 miles or so of range while you're there. (Understanding this is a hypothetical for you at this point.)