

It is sad that this guy just can’t let go.
Honestly though, if he can preemptively put sufficient funds into escrow dedicated to managing all aspects of the site and engineering plans for digging with minimal perturbation of each waste cell, then let him have it*.
(* Escrow amount should be approximately $780m)
If you’re in a union already, that is not something that can generally be asked about by management, both at hiring or during your employment. Being in a union is not the same as being in a unionized workplace.
When employees of a store/factory/etc decide to unionize, there’s a point at which a specific larger union can be chosen to represent them (AFL-CIO, IBEW, Teamsters, etc). If successful, this is what allows for collective bargaining led by a union representative.