Seasonal Analysis on Time-Series Data

I'm seeking an Excel expert for seasonal analysis on time-series financial data. The data is in Excel spreadsheets.

Key tasks:
- Perform seasonal analysis on time-series financial data.
- Use Excel for all calculations and presentations.
- Ensure accuracy and clarity in results.

Ideal skills:
- Proficiency in Excel, especially with time-series data.
- Strong analytical skills, particularly in seasonal analysis.
- Experience with financial data is a plus.

Please provide a sample of similar work done.