In our area, we have large numbers of Orthodox Jews. And despite the fact, that the cancer center was part of a donation by Jewish patrons, there are no Sabbath elevators. Trying to remember that the visitors cannot touch buttons on Friday to Saturday night, and they are often reluctant to ask assistance. We have staffers that initially do not realize that the kosher meals need to be heated inside the sealed package - microwaves are not kosher.
As I am Jewish but not Orthodox, I can help explain rules, but usually cannot physically work with them on the Sabbath/ Holy days. Because while I may not feel that it is wrong to help them on the Sabbath and consider it a Mitzvah, they cannot knowingly ask another, even one not as observant as they are, to assist them. And as some are my neighbors, they often know.
Recognizing that many of their Holy days are clustered. Negotiating procedure around the Yom Kippur, Rosh Hashanah, and Sukkat in fall can be complicated.
(some rules may make little sense to outsiders. Once during Yom Kippur, a Rabbi was in my care and desperately ill - needing a CT. As an acutely ill pt, many Sabbath prohibitions are null, permitting the extraordinary care in those circumstances. However, as most acutely ill Orthodox, he was accompanied by a young family member to help translate/ keep watch over his care. The pt needed to go to CT on ground floor and we were on tenth. I explained about the Sabbath elevator in that facility, but he said he was not permitted even to use it on the Yom Kippur evening and instead took the stairs up and down. I would consider that more obvious "work" than the use of elevator, but thus is that sect's rules.)