I have a project that requires me to grant access to my company's MailChimp and website backend to a freelancer. How do I protect the personal data of my clients stored on MailChimp?
There are lots of ways to do that.
To get real help with this, you need to post your question as a jost post here:
Copy and paste your question as the main part of the job posting. And specify that this job posting is NOT for a freelancer to do any hands-on work, but is intended to hire people to TALK with you and provide consultation. Post this as an hourly contract.
Hire 3 to 5 people to discuss this topic with.
Talk to each of them for between 20 to 40 minutes before making any specific decisions about how you will handle protecting personal data.