Contact List of US Digital Marketing Agencies Needed

We are seeking a freelancer to compile a comprehensive contact list of digital marketing agencies based in the United States. The list should include the founder or CEO's name, verified email address, company website, and LinkedIn profile for each agency. This information is crucial for our outreach efforts. The ideal candidate will have prior experience in data research and lead generation to ensure the accuracy and relevance of the contacts provided. Please include examples of similar work done in the past.