Custom field mapping - Account to Contact

Hi Folks,

I created a custom Contact field for a Contacts "industry" because I could not find an out of the box industry field. I am trying to map the industry Account field to populate the new custom field but have had no luck. 

I used the following resource to try and tie the mapping together, with no luck. I also tried a workflow, but when I try to update the custom field in the form, I cannot select the Account industry field.

http://help.pardot.com/customer/portal/articles/2132758-mapping-your-microsoft-dynamics-crm-lead-fields-to-contact-fields

Does anyone have any suggestions?