Populate email for list

I require data verification and cleansing services for a customer list containing approximately 1000 names of individuals and companies. The current list contains contact details that require validation and updating to ensure only accurate active email addresses are populated. The perfect candidate will have experience with using online tools and databases to search for correct email addresses by name, company name, location or other identifying information provided. Email validation and matching against the original list should also be performed to catch formatting errors or minor variations that may have occurred. Duplicate or invalid entries must be removed and a final cleansed list containing only confirmed functioning email addresses returned in CSV or Excel format. Experience working with lists of a similar size and within a similar timeframe of 1-2 weeks would be ideal. Strong research, data analysis and cleaning skills are necessary to completely verify each entry to the fullest extent possible within the allotted project window. Payment will be provided upon delivery of the final validated and formatted list.