Maybe in EASA countries but my experience is of having to use local airlines for 'local' oil (or at least non-EASA). Big brown envelopes might still have to be passed on if your own 'preferred' fixed-wing operator is intended for use. Where no such airline exists then even bigger brown envelopes required....
Country of origin of AOC/cabotage etc.
Some areas might be able to run the operation as a corporate lease but I cannot envisage that happening unless taken off the G-plate as purpose of flight would be to carry contractors/due consideration etc.
Looks like nothing more than a sound investment.
Does Bristows already have their own plank advisors for ooa ops?