I can tell you that another certification is probably not going to help you get a job any more than the ones you have. It’s important to look beyond “certifications” in and of themselves and get some hands on experience (i.e. on your own at home, internship, or volunteer work) and then get out there and make yourself known. People want to hire and work with people they know. Focused networking (i.e. going to events and meeting people, not connecting Ethernet and configuring IPs) is what I’d focus on right now if I were you. Look for local ISSA, ICCA, Cisco, UNIX, etc. groups and start handing out business cards asking people how you can help them. This formula has been proven time and time again to help you reap big rewards in your career.