SAP Webdynpro ESS Enhancement

I need to modify the SAP Webdynpro ESS portal's leave request application by adding a dropdown field for "Leave Type."

Requirements:
- Field Addition: Integrate a "Leave Type" dropdown
- Categorization: Options should be categorized by reason for leave

Ideal Skills:
- Experience with SAP Webdynpro
- Familiarity with ESS portal configurations
- Strong understanding of dropdown field integration

Looking for a freelancer who can efficiently implement this change.