Concrete Sleeper Retaining Wall Build

I need an experienced crew to design and construct a concrete sleeper retaining wall that will act as a boundary on sloped ground. The wall steps from roughly 400 mm up to 2 .8 m in height and will run for well over 20 m, so careful layout and tiered footing work are vital. The job covers: • Checking levels, setting out the line, and confirming pier depths suitable for the varying heights on the slope. • Supplying and installing galvanised steel H-sections, concrete sleepers, drainage cell or 20 mm gravel back-fill, and ag-pipe connected to a suitable outlet. • Ensuring all work meets local engineering standards for a boundary structure; if you already have certification capability or can liaise with an engineer, let me know. I will clear basic access, but you will need to provide the excavator, concrete, and lifting gear for the heavier sleepers. Allow for removal of spoil and a clean finish ready for fencing on the high side. Please outline your proposed schedule, sleeper specifications, and any previous projects on sloping sites so I can see your approach before we lock in dates.