Technical (Engineering) English to Spanish Translator

Translate English-language installation, operation, and troubleshooting guides for chemical process skids and components into Spanish that customer in Central America will understand. A technical background, preferably engineering, will be very helpful as our products combine many technical, mechanical components (including pumps, meters, valves, piping, heat exchangers, etc). Experience with technical translations essential. Attached sample is an example of the work required. We would need approximately 6 different documents like this translated, so an estimate of time per document should be submitted.