Verify and Update Company Contacts

I need a freelancer to verify and update a spreadsheet of company contacts. The task involves checking if companies still exist and if the contacts are still valid. If a contact is no longer valid, please replace them with someone of a similar title.

Requirements:
- Utilize online search and validation for verification.
- Preferred sources: Company website, LinkedIn, Industry directories.

Ideal Skills & Experience:
- Proficiency in using LinkedIn and industry directories.
- Attention to detail.
- Experience with online research and data validation.
- Familiarity with spreadsheets for updating information.