Expert Consultant for Digital Security Analysis, Reporting & Fixing for Prototype Development

I'm developing a prototype and need an expert to analyze and fix security issues.

Key Requirements:
- Expertise in security for hybrid systems
- In-depth knowledge of communication protocols
- Experience in securing data, networks, and access controls
- Ability to provide actionable recommendations and implement fixes
- Background in firmware, application code, and security analysis is a plus
-Experience in Prototyping

Please share your relevant experience and approach.