As former Ethereum Security Researcher, I currently do research and build Zero Knowledge Proof Systems. With an Undergraduate Degree in Energy Engineering, i felt as if Ethereum needs the Physics & Mathematical skills from Engineering to solve the two challenging issues in Blockchain: Privacy and Scalability.
For those who do not know Zero Knowledge Proofs, these are systems that use mathematical rules to authentically prove a secretive content or element without revealing it.
Upcoming projects i am currenlty working on, is ZK Voting Protocol Sytems.