Part of my generic Alien Crew Jacket is this particular set of pins, the crew insignia represents the job role on the ship.
I also have the limited edition pins from SDCC for the promotion of Alien: Covenant
And something I am aiming to buy soon is this facehugger pin which was a Loot Crate Exclusive
If you want to read about crew patches on Amazon and Etsy check out these posts
Last year on Alien Day you could take an assessment to see which role would fit you best on the ship, take the test now on AlienUniverse.com