You're in the business world now, Brian. Take the earring out and let the hole heal over. There's always going to be a little scar on the lobe hinting at your dark, secret past, and the sort of bars you used to hang out in, and the sort of cocktails you used to drink, and the sort of sofas you used to wake up on the next morning with your trousers nowhere to be seen, but if you keep your right side angled toward the person you're speaking too you might get away with it.
And wear a normal shirt. Being in the IT department isn't an excuse.