> For the complete documentation index, see [llms.txt](https://docs.deepmine.world/deepmine/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.deepmine.world/deepmine/deepmine-entities/game-roles/contractor.md).

# Contractor

A contractor is a citizen working in someone's mine using their [Equipment ](/deepmine/deepmine-gaming-nfts/equipment.md)or equipment provided by the mine [owner](/deepmine/deepmine-entities/game-roles/mine-owner.md). 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](/deepmine/deepmine-entities/game-roles/specialist.md) available by obtaining a specialty [certificate](/deepmine/deepmine-gaming-nfts/badges/scientist-diploma.md).

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