I worked in IT services in Dell Sonicwall Infosecurity in looking after the internal IT issues and troubleshooting.
I was also worked as part time employer for the university of auckland IT services in troubleshooting the IT related issues.
Consider my bid, I am still active on troubleshooting.
I dont have any portfolio to show the proof, but trust be and provide me a sample issue if at all u need to test me.
Cheers,
Dhinesh