I am assuming that your GF is a civilian. All civilians should give CHRO a copy of their resume and any applicable certificates if they wish to be employed on a military base in any capacity. That being said, some entities (Maint / Medical / Armoured) will also contract civilian companies (Calian for example) - if your GF wishes to work at the MIR, her best bet is to contact MFRC at whichever base you are on and they could assist with the steps in the hiring process.
Keep in mind - IOT work in the public service, one is up against the Veterans Hiring Act, essentially putting non-military (vets) closer to the bottom of the list in some cases...
Thanks for the answer
Yes, she is a civilian who has a diploma of health aide care and she will love to continue working in the health department. If she can work at a medical centre from the CF will ne perfect.