This report evaluates the potential of cloud computing for Smith Security Ltd, an Australian company with diverse security businesses. The report assesses the company's existing IT infrastructure, which includes Active Directory domain controllers, SQL servers, Lotus Notes email servers, print servers, IIS web servers, and business application servers across multiple data centers. It examines three cloud service models—Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS)—and determines the most suitable options for Smith Security Ltd. The report recommends IaaS as the primary cloud model due to its security and collaboration benefits, despite the potentially higher cost. It also suggests PaaS for the business application servers running custom software. The analysis considers factors such as cost-effectiveness, security, ease of migration, scalability, and collaboration. The report concludes with a recommendation for a phased approach to cloud migration, prioritizing security and business continuity.