Electrical Engineer, specialty in automation controls and software.
When I first started brewing I struggled greatly with the mechanical aspects of brewing. I had a lot of issues due to lack of understanding about the physics of brewing with pumps (struggled with cavitation for a long time), pipes, valves, heat exchangers, etc.
These days I work alongside many process mechanical designers, and I've learned a lot. It's not rocket science, but there are a lot of simple details that have to be followed or stuff doesn't work that well.