Hi Paul

I think you're right to be suspicious of this one. The name Nordvault does turn up on a site listing names and email addresses of known fraudulant job offer scams as Nordvault(at)gmail(dot)com. It's alway possible that Nordvault are genuine and scammers have just used their name but I couldn't find anything about them (just means they don't have an internet presence but grounds for extreme caution).
Good luck with finding a job,

Watchman