I do not have any project management certifications. I have been working with Fidelity Investments for last 6.5 years. During this time, i have worked multiple areas like capital markets etc.
It depends on individual but generally, job descriptions require certain certifications -standards universally accepted especially for higher positions. Without these certifications, the hiring managers have to depend on background checks to verify your experience with a foreign employer in your home country.
Will they do it?
1. With a few thousands of local/foreign applicants vying for the same position, unless you have exceptional qualifications in the specific field (similar) they might not be willing to proceed with your application.
2. Hiring managers have to justify salary range to meet MOM requirements for a work pass group. Without these certifications and no local work experience, they cannot verify your suitability. It might result- tougher to pass gate keepers even when you are in Singapore.
It depends on individual, clarity in your resume--- there is always a chance to those who persevere.