Quant shops seems to be the best path/least distance from old to new.
The only angle I can think is if you have mad skillz & passion for a domain and have done something interesting, like build an autonomous lawnmower or Alexa/IoT app for yr fridge to remind you to stock up. Slightly silly examples, but only a hook, such as publication in prestigious journal, will help you "beat" a PhD in the CV battle.
Is there not something right where you are that interests you, i.e. https://www.gsam.com/content/gsam/global/en/market-insights/gsam-insights/quantinomics.html
If you're interested:-
https://www.coursera.org/specializations/machine-learning-reinforcement-finance
https://www.coursera.org/learn/machine-learning-trading-finance