The Red versus Blue exercise is a customized, six to eight-hour, Cyber Range exercise hosted on ManTech’s Advanced Cyber Range Environment (ACRE). Led by expert cyber security engineers, the exercise can be executed in a classroom and remotely. In this exercise, a Master Scenario Events List (MSEL) is followed, which describes the red attack and execution time. The MSEL consists of such attacks as Business Email Compromise (BEC), SQL injection, Advanced Persistent Threat (APT), Data Ex-filtration, Privilege Escalation, and DoS. It is possible to customize the environment with the customer’s choice of tools. Red vs blue activity can also be customized. The ACRE team can simulate the red team actions, or supplement blue team or white team actions. This exercise uses a hands-on keyboard approach to create realistic technical training and management interaction opportunities where participants respond to and report events as identified. Participants are encouraged to view the simulated attack as if it were happening to their institutions in real time, and asked to share what they have done or would do based on the facts provided. Range-based exercises such as this help institutions better understand the impact of an attack and prompt them to improve ways in which their network defenders respond, communicate, request assistance, and recover from real-world cyber attacks. Institutions that have participated in this exercise have benefited directly by building greater interaction with their security community, as well as increasing capability maturity levels and resiliency across their specific customer sector.