The answer is greatly impacted by what you want to be considered for.
Two ‘general’ certifications that are very useful to have in the services space are ITIL training and PMP. The former is a standard methodology for looking at structured processes, the latter supports the thought you have a good background for managing projects.
Having said that, IMO important to finding jobs (in addition to certifications) is:
* related job experience (the circular problem we all have faced at one time), and
* aggressive networking within trade groups that touch our area (the reality is that no one really hires well, so if you know someone personally who is doing the hiring – or someone who knows the person doing the hiring – that is a very important leg up compared to people who just are throwing resumes over the wall