United States Research to Find Non-Profit Fundraising Professionals

I'm in need of a freelancer who can meticulously research and compile a list of over 20 qualified fundraising professionals or agencies in the United States, specifically within the non-profit sector. The list should encompass their full names, contact information, specialties, and relevant experience.

Ideal Skills:
- Proficient in online research
- Capable of verifying credentials
- Competent in delivering results in a clear spreadsheet or document

Please include examples of similar work you have done and your expected timeline for completion.