Kamma and right livelihood in a modern business environment It is easier to define "right livelihood" in the time of the Buddha when compared to our modern society. I would like to know if this situation can be considered wrong livelihood and if it creates bad kamma or not:

Imagine someone that works for a company, just a regular employee, maybe from HR, finance or the legal department, this person provides a service and gets paid for it, but what happens if the company sells alcohol or maybe other product that damages people's health or even if the company sells meat or products to kill insects, plagues and so on... 

To be honest a great part of the companies these days either damages the environment or the public health, others may have practices not very ethical regarding labour or tax payments, it is not easy to find a 100% "clean" business.

I have tried to find an answer in the suttas and dhammapada and the closest thing I found was a story about the wife of a hunter, she used to help her husband by cleaning his weapon, the traps and cooking the dead animals, the Buddha said she was not guilty and was not creating bad Kamma, only the hunter who was actually killing animals.

Are there better references than this one? In my example, is it wrong livelihood? Does it create bad Kamma?
It depends on what services you are providing to the company. If you are just helping them to balance accounts, it'll be similar to the hunter's wife cooking the meat. But if you are actually involved in poison making or marketing of the product, it won't be a right livelihood. Even as an HR officer, if you are hiring people to make poison or butcher animals, it's not a right livelihood. As a lawyer, if you are helping the company to get away with environmental damage, tax fraud, public health concerns, it's not a right livelihood. Yes, it creates bad Karma.