AWS S3 & Wordpress Gravity Form Integration

I need a little help finishing my implementation of a solution which enables SFTP transfer from a Wordpress Gravity form to an AWS S3 bucket. I have set up the S3 bucket and folder. I have imported the information into Gravity settings. I have verified that SFTP works with filezilla. But something isn't connecting between Gravity and S3 and I need help. Should be quick. I have set up the form to test allowing a user to upload files (mostly images). These submitted images and information have to be securely transferred to an AWS S3 bucket. The successful applicant has to have experience in working with Wordpress, Gravity Forms, AWS S3, and SFTP. Understanding of security measures for file transfers would be highly beneficial. Please do not respond if you're not specifically familiar with Gravity Forms. I will not award the job to someone who does not know it. I will give you temporary IAM access to our AWS account and Wordpress account. This is a quick job for someone who knows what they're doing and can help me get over the last hurdle here. The scope is limited and the request is very specific.