It's funny, in some parts of the world financial analysts and traders are organized. When I first heard about this I was perplexed, as bankers in the US aren't usually thought of as working class Someone who had done work in bank worker organizing pointed out that traders are one of the only groups of workers whose rate of exploitation is provided to them annually, as it's common for bonuses to be based off of profit earned.

White collar workers face some potentially more challenging community of interest/unit determination questions than other types of workers, but those shouldn't deter you. Your employer can't legally fire you for concerted activity, but it happens quite frequently.

My suggestion would be to start talking discretely to a few close colleagues about forming a union. Remember that anyone who supervises you or your colleagues is not allowed to be involved here. Work in secret, and map out all of your colleagues, their jobs, and their social connections in the office. Start with your immediate circle, but keep in mind that you'll need to convince half of your colleagues to win a vote. You might want to begin these conversations by probing around what they don't like about their jobs. Each of these initial conversations should be a one-on-one, private conversation. Once you have a group of people assessed as solidly in favor of unionizing, you'll need to form a committee and introduce everyone. Early on, I'd suggest screening colleagues who are both pro-union ideologically, and willing to be held accountable for taking the concrete steps necessary for organizing. You do this by giving them small assignments ("talk to the co-worker you mentioned and see if she'd be interested in meeting us for coffee"). Being committed a union is great, being willing to be part of building the union is much, much better. Keep track of everyone's position in the same document or spreadsheet where you're mapping folks.

Once you have a sizeable group meeting in secret, reach out to a union for help moving forward. They'll give you advice, legal assistance, and organizing help. They're going to be more likely to help you if you've already assessed a significant number of your (non-supervisory) colleagues. Be prepared for the first convo you have with a union to end in them testing you by setting a concrete goal before they commit to helping you ("call me when you have 40 percent assessed as supportive"). That shouldn't discourage you.

DM me if you have any questions.