Improve my employability

Answer:
From my point of view, the first question that you need to do yourself is about what the profile that you need or you want, Internal Auditor? Consultant? Ethical Hacker?

If you want to become Internal Auditor, or consultant about ISO 27001, qualifications like ISO 27001 Lead Auditor, ISO 27001 Lead Implementer, CISA, IRCA or any other related to information security can be good for you. By the way, generally the certifications ISO 27001 Lead Auditor and ISO 27001 Lead Implementer are more easy to obtain, so in your case can be the first way.

On the other hand, if you are interested in a certification more technical, for a ethical hacker profile, the certifications of SANS can be interesting for you (or certifications like CEH, CISSP, etc.).

These articles can be interesting for you:

“Qualifications for an ISO 27001 Intern al Auditor” : https://advisera.com/27001academy/blog/2015/03/30/qualifications-for-an-iso-27001-internal-auditor/
“How to become an ISO 27001 / ISO 22301 consultant” : https://advisera.com/27001academy/blog/2014/07/21/how-to-become-an-iso-27001-iso-22301-consultant/
“How to become ISO 27001 Lead Auditor” : https://advisera.com/27001academy/knowledgebase/how-to-become-iso-27001-lead-auditor/

And finally, maybe our online course can be also interesting for you “ISO 27001:2013 Internal Auditor Course” : https://advisera.com/training/iso-27001-internal-auditor-course/