Singapore is the center of business in Southeast Asia and an international hub, thriving with multiple cultures and people from all around the globe. Why would someone even think English is not necessary here? Opening up a new business or searching for a decent job in Singapore? In both cases, you need to master English as if it is your mother tongue. Corporate employees are required to go through a professional business English course Singapore, it is not mandatory though but as a benefit you will become a valuable employee for your organization.