The miner is responsible for performing all dig/mine operations. This profession is how your people will obtain stone, dirt, sand, and ores. The miner will need at least a stone pick to being mining ore, though it is recommended to upgrade your tools whenever possible.
At level 3, your miner can mine Copper Ore.
At level 5, your miner can mine Coal.
At level 6, your miner will unlock the ability to mine Tin Ore.