First of all, big respect for achieving that. I believe your boss is a Dutchman right? Now, I am Dutch and work and live in The Netherlands (aka Holland). Since a year or two, almost every city here accepted local laws that forbids "carrying any sharp object". Despite that, I'm still EDC'ing a Spyderco Military in my right back pocket, all day, every day (since 2008). And I have a Cold Steel Rajah II in my Falcon II backpack that I EDC to work. Even in the time that my Spyderco Military was still legal to carry (and it still is according to national law, despite the vast majority here would suspect the contrary) nobody in my surroundings carried even a swiss army knife. In other words, I scared the shit out of people at work when I pulled out my Millie for the first time. But they're used to it now. And since my colleagues learned that I carry a shitload of other stuff next to my Millie, they leave the boxes and little repair jobs for me nowadays, because they know I'm the only one with the tools for it. They got used to it very quickly and they know that me carrying a big folder to work doesn't make me any less of the warm, kind and extremely attentive colleague that I am

So if the laws in Princeton New Jersey allow you to carry a Spyderco Military, I personally wouldn't be bothered with what "liberal" colleagues think of that, if I were you. They will get used to it. And I would expect that the top-notch scientist that are from all-over the world that are your colleagues, will be open-minded enough to understand that different colleagues are different and that they're living and working in a country that has a different "weapon-culture" so to speak, than where they are from. Or at least, that the top-notch scientists that are your colleagues won't judge your work and colleague-being on the fact that you carry something that they won't.
(Please mind I'm not a native speaker.)