20m High Concrete Retaining Wall Design

I need a structural engineer or experienced designer to create plans for a 20-meter high retaining wall, using reinforced concrete.

Requirements:
- Design for a 20m high wall
- Use of reinforced concrete
- Must adhere to safety and engineering standards

Ideal Skills and Experience:
- Structural engineering expertise
- Experience with high retaining wall designs
- Knowledge of reinforced concrete properties and behaviors
- Familiarity with local building codes and regulations

Submit detailed plans and calculations.