Hey there!
It's a somewhat cliche answer, but I'd say there's no real specific skill set, as there are a bunch of different types of roles. With educational background, we have those who were almost exclusively self-taught with no college education, to PhD candidates. Each role within the team requires a different skillset, and we seek to have a diversity in knowledge so that we can have a multi-faceted approach. Majority of the team does have some sort of computer science background, but the specialties widely vary - we're far from all sysinternals guys.
I actually come from a completely different work space than video game cheating - I come from the world of online poker security. However, the team took a chance on my threat assessment and problem solving abilities to have carryover into the Anti-Cheat space, and I think this highlights how pragmatic we're willing to be in looking for what the "right fit" is.
I'd say the commonality between the team is an aptness for adaption. It is an arms race between us and the cheating community, and so being able to assess new problems and learn swiftly is paramount.