Excel to Google Sheets Migration

I need to migrate an Excel workbook with 30 sheets to Google Sheets and Google Apps Script (GAS). The workbook contains buttons that run various macros.

Requirements:
- Migrate all sheets and functionality
- Convert and implement macros using Google Apps Script
- Ensure buttons work as intended

Macros include:
- Data processing
- Formatting
- Import/export (no external API interaction)

Ideal Skills:
- Proficiency in Google Sheets and Google Apps Script
- Experience with Excel macros and automation
- Attention to detail and problem-solving skills

Looking for someone who can complete this accurately and efficiently.