# Contractor

A contractor is a citizen working in someone's mine using their [Equipment ](https://docs.deepmine.world/deepmine/deepmine-gaming-nfts/equipment)or equipment provided by the mine [owner](https://docs.deepmine.world/deepmine/deepmine-entities/game-roles/mine-owner). They are easy-going and proactive, able to find the best conditions in a dynamically changing environment. Players acting as contractors cannot simultaneously mine at their mine and a contract one.

* The Contractor can independently choose the mine to work on.
* The Contractor can upgrade their equipment to improve DME production performance.
* The Contractor can only work on one mine at a time.
* The Contractor can obtain any [Specialty](https://docs.deepmine.world/deepmine/deepmine-entities/game-roles/specialist) available by obtaining a specialty [certificate](https://docs.deepmine.world/deepmine/deepmine-gaming-nfts/badges/scientist-diploma).

![](https://2710288112-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MhIXV03y_X0mKZzu-Pw%2F-MhJloNC2BYywUGwmhfU%2F-MhJslhT4kTo6_r4xPdP%2Fdeepmine-logo.png?alt=media\&token=dd68933b-4a97-40f3-8ce4-eea462d8ca2a)