I have come across a film (fictional) concerning the Holocaust in which officers of the 'Leibstandarte SS Adolf Hitler (LSSAH)' are depicted working in concetration camps.
It all depends on what is meant by "working in the camps".
There were two groups of camp staff:
1. The camp staff proper, who were situated inside the camp and directly supervised the prisoners. They were divided into "camp leaders", who were in charge of the prisoners when they were in their barracks, and the "work leaders" who supervised them when at work outside the barracks, and even outside the camp.
2. The guard companies, who manned the watchtowers on the camp perimeter, and also provided guard detachments for groups of prisoners working outside the camp. The members of the guard companies rarely entered the camp itself, and did not usually have direct contact with the prisoners. By far the majority of all persons attached to concentration camps belonged to the guard companies.
The camp staff proper were all members of the pre-war Totenkopfverbaende or war-time recruits drawn from the Allgemeine SS, and tended remain posted to one camp or another throughout the war.
By contrast, members of the guard companies tended to be circulated through the camps, being transferred back and forth between front duty and camp guard duty, according to need. They could belong to any Waffen-SS unit. Quite often Waffen-SS men who had become unfit for frontline duty were transferred to the camp guard companies.
As the war progressed, the tendency was to transfer all young, fit members of the guard companies to the front and replace them with older men, quite often veterans of the First World War, and with the wounded. At the end of 1944, large numbers of Luftwaffe personnel were transferred to the Waffen-SS for camp guard duty.
The camp doctors were yet another category. They were not actually on the camp staff, but were seconded for duty there, being part of the SS medical corps under the Reichsarzt-SS, Dr Grawitz.