Sorry for the late reply, but I had to reinstall ESXi since I was using Hyper-V for the time being.
The solution provided by jsahn worked for me, after installing ESXi 5.5, installing the LSI_2.27.08.036vm50-offline_bundle-637081.zip and the VMware ESXi 5.5 Driver for PMC-Sierra scsi-aacraid SAS RAID Controller, my card and raid array are detected.
Currently formatting the datastore, will report back after I've run a few tests