SQL consultant

I am looking for a SQL consultancy company to assist me with my project.
Specifically, I need help with query optimization, database design, and data migration tasks.
I am open to suggestions and don't have any specific requirements or goals for the SQL solution.
I prefer to communicate with the consultant via email.

Skills and Experience Required:
- Strong expertise in SQL query optimization, database design, and data migration
- Experience with various database management systems
- Excellent communication skills, specifically via email communication