Problem solver and Troubleshooter

Problem solver noun - A thinker who focuses on the problem as stated and tries to synthesize information and knowledge to achieve a solution.

Troubleshooter and problem solver are semantically related. In some cases you can use "Troubleshooter" instead a noun phrase "Problem solver".

Troubleshooter noun - A worker whose job is to locate and fix sources of trouble (especially in mechanical devices).

Problem solver and troubleshooter are semantically related. You can use "Problem solver" instead a noun "Troubleshooter".