I guess my thinking is if the disgruntled employee was so upset over not getting a promotion to cause so much damage they must have been in a high enough positi

I guess my thinking is if the disgruntled employee was so upset over not getting a promotion to cause so much damage they must have been in a high enough position already to warrant such a disposition, and "high enough" might mean high enough to have push access themselves. Edit: see closeparens comment above. Complicated systems can always be subverted when trust is broken.