Hello clmmoose,
No.
"Consultants" who go around installing "their" volume licenses for Office on client computers are no more than overpaid software pirates installing stolen software.
No Microsoft Volume Licensing Agreement permits a consultant to do what you describe.
Resellers are permitted to sell your organization a Volume Licensing Agreement (VLA), which would be registered with Microsoft under the name of your organization (and not the Reseller). Value-Added Resellers of VLAs often offer their clients
installation services.
To the casual observer that sees "the computer guy" installing software, it might not look like there's a difference between the two scenarios, but from a licensing perspective, it makes all the difference in the world.