Architecture is a concept based profession. No two architects or architecture firms are similar. Being a creative field, every architect has a different mindset and you can get ten different designs from ten different architects. So finding the ideal architect for your requirement will be a real challenging task. You must consider factors like your requirement, budget, ease of talking with a particular firm, their reputation and credibility and their experience to choose.
Singapore being a business hub has a large number of high rise buildings, each better than the other. When you are looking for one of the leading Singapore architecture firms, give considerable thought to Ming Architects.