BJ Johnson is a leading expert in power systems decarbonization, specializing in transitioning heavy-duty internal combustion to sustainable fuels. He holds a Ph.D. in Mechanical Engineering from Stanford University, where his foundational research in advanced combustion strategies paved the way for modern alternative fuel platforms.

Prior to joining Diamond Power, BJ was the Co-Founder and CEO of ClearFlame Engine Technologies. Under his leadership, the company raised over $50 million from top-tier investors—including Breakthrough Energy Ventures—to prove that Class-8 trucks and power systems could run on 100% renewable fuels. At Diamond Power, BJ leverages this deep technical and entrepreneurial track record to scale our multi-fuel conversion technology across the genset, marine, and industrial markets.