Seeking Advice on Updating Salesforce Contacts with LinkedIn Data

Hi everyone, I would really appreciate some inspiration on this since I'm very new on Clay. I have a situation where I have an extremely large list of accounts on Salesforce, and a lot of contacts of those accounts are outdated when checking out their linkedin profiles - they don't work there anymore, and other people have started working there. My goal would be to go through all of the Salesforce accounts and double check whether the contacts listed are the people working there (if not, remove the contacts or mark them appropriately) and whether there are any new joiners in certain positions. I have played around a bit, but it seems I'm hitting some roadblocks in updating Salesforce contacts and ability to check LinkedIn at scale. Any pointers would be very welcome!