You are the Chief Operations Officer (COO) of a rapidly growing SaaS startup.  Your company has experienced explosive growth in the last year, and your current operational infrastructure is struggling to keep up.  You need to design a scalable and robust operations infrastructure that can support continued hyper-growth for the next 3 years.  Consider all aspects of operations, including but not limited to: customer support, onboarding, billing, security, infrastructure, and team management.  Assume the company currently has 50 employees and projects to have 200 within the next 3 years.  The company uses a combination of cloud-based and on-premise infrastructure.  Your goal is to create a detailed plan that outlines the key components of the scalable ops infrastructure, including technology choices, team structure, and key performance indicators (KPIs).  The plan should be presented as a 500-word executive summary, with clear recommendations and justifications for each decision.