Excel Macro for Data Cleanup

I'm looking for an expert Excel macro programmer to assist with data validation and cleanup. The data will be imported from another file.

Key Requirements:
- Create a macro for data validation and cleanup
- Handle data imported from external files
- Ensure accuracy and consistency in the data

Ideal Skills:
- Advanced Excel proficiency
- Expertise in writing and debugging macros
- Experience with data validation and cleanup processes

Please share samples of previous work and relevant experience.