# 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). ![](/files/-MhJslhT4kTo6_r4xPdP) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.deepmine.world/deepmine/deepmine-entities/game-roles/contractor.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.