HA Architecture within AWS to Security

Overview of Project HA Architecture based on AWS connected to a number of SaaS to handle Security, SIAM, Integration, API management etc.  Security must be built into design models up front. Security should be based on NIST or COBIT, and Cloud Security Best Practices (patterns from real world implementations).  Security of the Perimeter, Application Data, Data at rest, in transit and Data which should be masked are all important considerations.