Hmmm, if it is leaking when it is turned off then I would first check the water supply line connections and the line itself. It could also be a bad drainage line hook-up, check the clamps at the connection points and the line itself. There should be a loop in the drainage line under the sink to keep water from backwashing into the dishwasher. It is much harder to trouble shoot a leak when it is actually running. That could be many things including a bad door seal or the dishwasher needs proper leveling, among others things.
As far as finding someone to service a Bosch, I would google Bosch dealers in the area and call them and have them share their recommended Bosch service technicians in the area. Good luck : )
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