Python Script for XML Creation

I have an urgent need for an experienced Python developer to write a script that will generate an XML file for data exchange. The XML file needs to follow a specific XSD schema that I have enclosed.

Key Requirements:
- The script must take input from an Excel file (provided in enclosed zip)
- The output must be in XML format (provided in enclosed zip)
- It must adhere to a given XSD schema for data exchange (provided in enclosed zip)

I need this project completed urgently and I'm looking for someone who can demonstrate previous experience with similar projects. In your proposal, please provide a detailed plan for how you would approach this task, your relevant experience, and the estimated time frame for completion.

Ideal Skills:
- Excellent Python programming skills
- Experience in working with XML and XSD schema
- Ability to deliver projects quickly and efficiently