Shabbos and work

Are there any other Orthodox Jews here who have struggled with getting Shabbos (and Yom Tov) off from work or finding a job that respects it? I haven’t graduated college yet, and in the jobs I’ve had so far, getting Shabbos off consistently hasn’t always been guaranteed. I haven’t worked on Shabbos in over a year, but for July 4, my manager warned me she needs to schedule me for that Shabbos the July 05, since I work at a resort. I feel guilty about it since i’m openly an orthodox jew at work and that can create a chillul Hashem. I could really use some advice.