There are thousands of professional certifications offered by prestigious institutions, and oftentimes they truly helpful to sustain your profile as a specialist in a particular niche within your area of expertise - these can get you ahead of the competition when applying to certain jobs both at headquarters and on the field - I will elaborate on those in the second part of this article.
However, when it comes to widening your areas of opportunities in your job search, I recommend focusing on acquiring the generalist kind. And moreover, ensuring you have those that meta-data studies suggest will be on demand for the next year to come in the impact sector and those who are useful for strengthening your managerial competencies.