Tenet3 is a computer science and engineering firm delivering quantitative cyber security analyses to Department of Defense and private sector customers. We specialize in cyber security economics. Specifically, we identify the strategies and tactics that lead to optimal security investments for our clients. Our metrics assess threat mitigation strategies, cyber security costs, residual risks, and resiliency in complex systems. We believe that the best way to achieve cost effective cyber security is through strategic analysis of a system "as designed", "as built", and "as operating".