Excel Enhancement Specialist Needed

I'm seeking an Excel expert to enhance my existing workbook.

Key Requirements:
- Improve data organization:
- Create new data structures
- Automate data processing using macros

Ideal Skills & Experience:
- Proficiency in Excel, especially with formulas and macros
- Experience in designing efficient data structures
- Strong background in automating tasks with Excel macros
- Attention to detail and ability to improve user interfaces for better usability

Please provide examples of previous work.