A contractor is a citizen working in someone's mine using their Equipment or equipment provided by the 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.