FE at 54, PE at 55 (six months late)r.
I did not work much in engineering after my MBA at 30. However, I always worked in the periphery of oil and gas/energy. I got really hooked with the renewable energy idea and wanted a reset of my career. I can do it without a PE; my MBA/CFA has a lot of demand in this industry. However, I wanted the extra credibility and confidence that comes with a PE.
Also, if you want to keep Parkinson's at bay, taking the PE is a great tool!. Beats any amount of crossword or Sudoku
.