We were discussing something like pre-boss era, post-boss era. What word describes the era where the boss is still there?
Peri-boss era. This prefix allows you to create delightfully clear parallel construction that covers all cases:
- pre-, before
- peri-, during
- post-, after
Google [ pre- post- peri- ] for examples “in the wild”. These prefixes are popular in medical terminology, such as pre-, peri-, and post-anesthesia.
Although it might more conventionally be expected to mean "inside the boss", there is some support for the notion that you could describe this period as the "intra-boss" (during the boss) era.