AWS Cost and Performance Enhancement

I am looking for a seasoned AWS expert to provide key optimization strategies for enhancing both cost management and performance scalability on my AWS account.

Key Objectives:
- Reinforce cost optimization measures already in place (currently using Reserved Instances)
- Revamp performance and scalability measures for Amazon EC2 service in use

Ideal Skills:
- Significant experience in AWS cost management and performance scalability
- Proven skill in using Reserved Instances for cost optimization
- Proficient in optimizing Amazon EC2 service