If you don't get a name, get a role or a department. John Doe (person), CTO(role), Biz dev, engineering, etc(department, division).
Contact the company and ask to be put in contact with them.
Physically go there and ask to meet someone.
Use the following queries in Google Search:
site:https://news.ycombinator.com/user?id= Waymo
site:https://news.ycombinator.com/user?id= Uber
site:https://news.ycombinator.com/user?id= Lyft
Contact the people based on the information provided in their profiles. Introduce yourself as a fellow HN user. Describe what you're working on. Describe what you need. Ask if they can help directly or indirectly by orienting you to a person closer to resonnance with what you need. Repeat.If they left the company, ask if they can point you to someone who's still there.
Always thank them.
Keep track of people and provide this as well: I asked someone here recently about what they do. They emailed me to explain their tech. I thought "You definitely ought to talk with X and Y" and asked if they'd like an introduction.
When you find something useful that could be relevant to the people you contacted, send it their way. It could be anything. Periodically ask about how they're doing. You might help sometimes. These two points are additional, I don't know if you care about people or not. I do and I'm interested, therefore that's what I do by default.