National Defense Attorney Database

We require someone to build a database of EVERY defense attorney in the United States. Specifically we need names and email addresses, but would also like phone numbers and addresses when possible. The Freelancer would be free to use any software and data source they choose, as long as the data output is clean and in spreadsheet format. Care will need to be taken to minimize duplicate and erroneous entries. Please understand that it is possible this will yield a very large number of results.