We hired a new employee on the 29th of April, at a time Mercury was almost finishing it's retrograde. No legal contract was signed, She was by far the most promising candidate. Around the second and third she has called in sick. We had a pep talk with her and she remains interested. Personally, I still have a good feeling about her but doing a background check on her, she's coming across dodgy. It doesn't help when I have contributed to her hiring and now everyone particulary coworkers are blaming me.
My question how does she fair with Mercury retrograde?
The parts I bolded are the relevant details here. No contract, and her background check is coming across dodgy. Mercury being retrograde when she was hired is much less relevant than those two details, although there may very well be a connection. I suspect Mercury retrograde is the astrological reason why the problems surfaced so soon.
When Mercury is retrograde, problems that stem from a lack of attention to detail, usually a lack of attention to detail sometime in the past, surface. Is it standard at your company to not do background checks until after employment starts? And by "background check," do you mean just a reference check, or does your company do a criminal background check? What's dodgy about hers?
If you typically don't check references before making a job offer, you will miss warning signs of a bad hire. If you haven't made a bad hire before, then you lucked out, and hired people who proved themselves good despite the lack of checking on your part.
Planetary retrogrades are time for karma to surface. Karma simply means the results of action or inaction.
If you hire someone new now, the same due diligence is called for. Mercury being direct might lessen the likelihood of a problem surfacing immediately, but if there is a problem with the new hire, it may come to light during the next Mercury retrograde.