Current driving a truck? Never heard of that before. Also there is no such thing as a HR combination. I had been away from driving a truck for 5 years and got hired on straight away when AV8 went under.
You don't need to be current you just need to have driven professionally at the size the employer wants. I have a HR license from a long time ago but never really used it in anger. Did look into upgrading to MC but discovered the issues stated above. Family have worked in trucking and they got a start by being friends with the owner and working for free, just like aviation!