Custom High-Security Steganography Algorithm

I'm in need of a bespoke steganography algorithm, which is not publicly available, tailored to my specific needs. The primary purpose of this algorithm is to conceal encrypted zip or 7z archives within images.

Key Requirements:
- The steganography algorithm must be capable of hiding these encrypted archives within images with a high level of security.
- The algorithm will be used for high-stakes, security-sensitive applications, so a basic or moderate level of security will not suffice.
- The ideal candidate will possess a deep understanding of steganography, with the ability to create a custom solution that meets my requirements.

Skills and Experience:
- Proficiency in designing and implementing steganography algorithms.
- Experience with image processing and file hiding techniques.
- Understanding of zip and 7z file formats.
- Ability to deliver a solution that is both secure and efficient.