New to radio

I’m a subcontractor and I usually spend three months at a time with contractors and they have two ways in their trucks plus walkies. Is there a radio I can purchase for my truck that I can set for those frequencies when I’m on a job?

Practically? Almost certainly - it does revolve around you getting the basic specs of the system if it’s analogue. If it’s digital, you need more info and a specific radio type. If it’s the former - then you can do it quite cheaply. Legally, of course, depending on where in the world you are - things are either simple, or very tricky for compliance.