Heyy man,
Its so nice to see your job. I have just completly reconfigured the setup in our company. Like 2 open vpn servers, one for people and others that always need to stay turned on. Its rocksolid bulletproof, and as speedy as u want. And next to that we have 2 way authenticTION also added which is great. If you want i can show u a demo of our system, just message me!
Take care man, best wishes Olivier