Collect contact names, job titles and email addresses

I have attached a list of 86 companies, In this list I need the name, job title and email address for the Sales Director, Managing Director, Director or most senior person. I Only require 1 per company and we currently have generic emails for each record but we need actual named contact. Also, many of the email addresses are not specific to a person, I need email addresses with the correct name, not info@ or sales@.

Please could you let me know if you can do this and to what level of accuracy and how long it will take.

Thanks,

James