Hi I would like to volunteer at a company for a couple of weeks how do I go about doing that?

Local "soup kitchens" and food banks are very busy this time of year. Give one of them a call and ask them when would be good for you to help. They would be most thankful.

Do you have a company in mind? Ask them if they have a volunteer program.

Need more info here. What type of company? What type of work? What is your purpose?