Summary
D J Capelis is a security-focused technologist with 26 years of experience blending deep systems research and applied engineering to secure large-scale platforms. He led OS security and kernel-level defenses at Apple, drove security design across product roadmaps and cloud trusted environments, and has a PhD in Computer Science from UC Santa Cruz. Earlier roles include building campus-wide identity and network security at UCSD, pioneering research that combined hardware, storage and performance experiments, and practical work improving safety-critical transport systems. He also contributes to creative engineering through an art collective that builds large kinetic sculptures, reflecting a taste for hands-on fabrication and unconventional problem solving. Now based in San Francisco and working as a flight attendant, he’s taking time to see systems from both above and below the clouds while remaining ready to re-enter technical leadership. Notably, his background spans both academic research and high-stakes production security at scale, with a proven ability to translate theory into hardened, operational systems.
26 years of coding experience
8 years of employment as a software developer
University of California, San Diego
University of California Santa Cruz