I'm a home care worker for people with disabilities, a circus performer, and I just got a job as a coordinator for the environmental group at my university. Dreads are not really a problem for any of these jobs, I tie them back if I need to be professional, or wrap a scarf around my head- but that's mostly not necessary.
ima custom installer tvs projecters home automation etc my bosses employed me when i had shitty waxy dreadz i would wear a hat to look a bit more respectable now i tie my dreadz back for a cleaner image. as long as i wear my uniform tidily my employer couldnt give a fuck what hair style/piercings i have i wouldnt work for someone who had a problem with dreadz