1) Maintaining a steady job in an industry in which that person is not the "norm"
2) Performing in an area in which that person is essentially not accepted, but managing to perform the task at hand anyway (without missing a beat despite the hate).
3) Being present in a place which is deemed basically as hostile, so that others who look different (or are different) can also potentially gain access to that field (albeit always in limited numbers).
Jason: Hey Joe how is it going at that job you work at? Still holding it down for the rest of us?
The maintenance, operation and proper outward appearance of a work place, facility or law enforcement administration by employees, while others are not present and without permission.