Hi,
I have expertise of below techniques in aws cloud infra :-
1. EC2 creation modification termination
2. Assigning and removing elastic ips on live instance
3. S3 bucket creation, mounting bucket to different EC2 instances, uploading contents into bucket.
4. EBS volume creation, attaching volumes to different live ec2 instances
5. Volume snapshot creation and then restoring instance from that snapshot
6. Expanding volume in live ec2 instance without data loss
7. Security group creation, assigning security and permission on different services
8. RDS management, creating databases, attaching same database to different instances, backup
of databases, expanding database size on live instance
9. Load balancing according to traffic on site
10. DNS fail over and recovering it from same or different region
11. Auto scaling in which if any of the instance will stop responding then a copy of instance will be loaded so that there will be no down time.
12. Backup of instances, database, volumes
13. Cloud front, it help us to load contents of website from near by location
14. Monitoring services