Glacier Guides is recruiting for 2021 positions:
https://glacierguides.submittable.com/submit
And if you can't wait, Izaak Walton Inn has groomed trails and lotta snow.
In past years, the Inn offered guided backcountry -- in Glacier! -- skiing, then moved that operation over to Glacier Guides for the Inn's guests.
No information currently on either site as to this year's plans, if any.
Amtrak's Empire Builder stops nearby (Essex stop).