Pros
I've been in the security industry my entire career and I have never experienced anything like Synack. The culture and accessibility to executives is unthinkable. The ability for individual contributors to drive the company roadmap and the easily approachable and talented individuals in every division is incredible. If I wouldn't have been afforded the opportunity to experience it myself I doubt I would have believed it. It simply is the best company to work for. It's a wonderful feeling not being the smartest person in the room while the smartest people in the room are humble enough to share their knowledge openly regardless of the company division you work for. Throw in the consistently amazing talent the Synack community brings to each engagement and it's obvious that Synack will continue being the place to work in 2018.
Cons
There aren't any as of 2018.