AWS EC2 Security & Multi-Service Support

I have several workloads running on AWS—primarily EC2 instances, with data stored in S3 and event-driven pieces handled by Lambda—and I need an experienced hand to tighten security and confirm we meet best-practice compliance... (Budget: $10 - $30 USD, Jobs: Amazon Web Services, Audit, AWS Lambda, Cloud Computing, Cloud Security, Linux, System Admin, Terraform)