The Center for Internet Security (CIS) is a nonprofit organization, formed in October, 2000.

Its mission is to "identify, develop, validate, promote, and sustain best practice solutions for cyber defense and build and lead communities to enable an environment of trust in cyberspace".

The organization is headquartered in East Greenbush, New York, with members including large corporations, government agencies, and academic institutions.

References:

https://en.wikipedia.org/wiki/Center_for_Internet_Security