List of USA golf clubs email addresses and details

I require a comprehensive database of key decision makers across various golf clubs located in different states of USA. The final deliverable should contain names, designations and email addresses of Golf Club Managers, Directors, Presidents and Chairpersons. Special attention needs to be given to gathering accurate information from privately owned, members-only clubs which can be difficult to find online. The goal is to build a customized mailing list to promote my golf club app. Reaching the appropriate stakeholders directly will help create awareness about our products and establish early connections. Publicly available information from club websites and directories may form the initial dataset. It will require dedicated search efforts to uncover contacts hidden from general searches. The challenges lie in verifying the authenticity of each entry and ensuring email formatting standards. Proper research methodology should be proposed focusing on techniques like consulting sports networking platforms, mining LinkedIn profiles and quality search operators. Periodic updates to account for changes must also be addressed. The final deliverable format should be a structured Excel file with necessary fields and validated entries. Adherence to data privacy guidelines is expected while collecting information.

Please note - this is for all of the golf clubs in the US, which is over 16,000.