Xero Invoice Template Customization

I need an experienced Xero expert to modify my invoice template based on a supplied design.

Key Requirements:
- Modify layout and design as per a supplied PDF or image file
- Add Xero custom fields to the template and ensure they display correctly in Xero.

Ideal Skills:
- Proficiency in Xero
- Proficiency in Microsoft Word
- Experience with customizing invoice templates
- Ability to work from a provided design
- Attention to detail