Yes, a job can absolutely fire you for smoking THCA pre-rolls. Once THCA pre-rolls are combusted, the THCA quickly turns into Delta-9 THC, which is the main compound that standard drug tests look for. The majority of workplace drug policies don't make a distinction between the source of cannabis, just the existence of THC metabolites. As such, smoking THCA pre-rolls from Killa Kush may result in a failed drug test and possible work repercussions.