I might stand up for a doctor who tells the city council not to authorize construction of a new hospital wing, even if the hospital really wants one. It would again depend on what they say and why. You can't wield your employer's name and proprietary information against them in the political scene, and political activism on the job is another story entirely, but you have every right to show up to city council meetings as a NIMBY even if your employer finds NIMBYs inconvenient.