Agriculture and crafts
Most prisoners had to do heavy manual labour, such as mining or quarrying. Some had to work in the armaments and chemicals industries. A small number of lucky ones were given office jobs.
The Germans in the concentration camps were mostly responsible for security, they were the guards and the executioners.
There is no historical evidence or information available to suggest that Hannelore Schmatz had any role or job in a concentration camp. Hannelore Schmatz was a German mountaineer and not associated with the atrocities of the concentration camps.
One of the jobs were to clean up dead bodies from the chamber. Also prisoners had to separate belongings of people who were dead. Then another one was feeding bodies into the place where they were burned to ash.
Firstly there were the normal jobs like kitchen duty or cleaning that you would see in any prison. In concentration camps there was a determined effort to keep the inmates busy, so sometimes they were made to dig, carry or do such manual labour just for the sake of it. There were also many construction projects and sub-camps were established to have the workforce close to the Project.
In the concentration camps they had jobs like sewing uniforms, farming, also things like digging ditches for the dead bodies or throwing them in them.
to get the jobs done, and done cheaply
Auschwitz was a extermination camp, unlike other camps, people were brought there solely for the purpose to be exterminated, not to work.
it was really horrible for the people who went there. They had to do slave jobs and were killed if they stopped doing a job for even 1 minute. most people were gassed in the gas chambers and lots of people died in the concentration camps.
That varied a lot, especially in the early stages. In the 1930s a few lucky people were released after a few weeks or months. However, most prisoners were held indefinitely or until they died of were killed. For example, Ernst Thaelmann, who had led the Communist Party of Germany was held from 1933 till 1944, when he was murdered. Obviously, in the extermination camps people were killed soon after arrival or worked to death on grossly inadequate food.
They killed six million Jews, after having thrown them out of their jobs and herding them into ghettos and concentration camps.
Laboring such as burning bodies and collecting along with melting metals some did work in quarries.