Certs can come and go or be outdated as fast as the technology they support. But in today’s job market, having the desired certifications on your IT resume can certainly open doors (no matter what you may quietly think of them). They have been, and continue to be, a strong differentiator in hiring.

Here is a list of the top ones currently on the market:

1: MCITP (Microsoft Certified IT Professional)

Enterprise Administrator on Windows Server 2008

Virtualization Administrator on Windows Server 2008 R2

Enterprise Messaging Administrator on Exchange 2010

2: MCTS (Microsoft Certified Technology Specialist)

In Exchange, SharePoint, Virtualization, Windows Client, or Windows Server

3: VCP (VMware Certified Professional)

4: CCNA (Cisco Certified Network Associate)

CCNA Security certificate

5: CSSA (Certified SonicWALL Security Administrator)

6: PMP (Project Management Professional)

PMI (Project Management Institute)

7: CISSP (Certified Information Systems Security Professional)

(ISC)² (International Information Systems Security Certification Consortium, Inc.)

8: ACSP (Apple Certified Support Professional) for Mac OS X

9: Network+ / A+

10: CompTIA Healthcare IT Technician