Static IP Address and NAT for internet printing

I'm actually asking about an 815S for AT&T, but anyway, I'm the I. T. manager of a company and I have an employee with one of these air cards at home. She wants to work from home, the only problem is that for her to be able to print from our back end system to one of her printers at home, she needs a static IP address and I need to be able to set up NAT to direct the print jobs to her printer. I don't think that this AirCard can do that. Just to break this down to its simplest terms, I want to be able to send a print job to a static IP attached to this AirCard, then forward that print job to the printer's internal IP, which happens to be 192.168.1.212. If anyone has any ideas on how I can do this, even if it means some other kind of equipment, I would appreciate it. I'm fine with her working at home and I'll pay for whatever she needs, but I don't think the AirCard 815S can do it. She's running Windows 10.

Many thanks, 

Steve Young