Concrete Retaining Wall

I'm looking for an experienced landscaper or contractor to build a concrete retaining wall. The primary purpose of this wall is for garden and landscape design, and it will be approximately 164 meters long.

Requirements:
- Use of high-quality concrete
- Expertise in landscape design integration
- Ability to handle large-scale projects (over 20 meters)
- Experience in erosion control to ensure wall stability

Ideal skills and experience:
- Proven track record with concrete structures
- Strong landscaping background
- Project management skills for large jobs
- Relevant certifications/licenses

Please include examples of past work and a timeline for completion.