Andrew Zonenberg
Principal Security Consultant at IOActive, Inc.
Seattle, Washington, United States
Summary
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RockstarAndrew Zonenberg is a Principal Security Consultant and cross-disciplinary embedded systems researcher with a PhD in computer science, specializing in hardware-aided OS security and full-stack hardware/software auditing. He brings 12+ years of hands-on experience across C/C++ development on Linux, Windows, and bare-metal platforms—from 8‑bit microcontrollers to GPU clusters and IBM BlueGene/L—and deep reverse-engineering skills across MIPS, x86, PIC, and ARM. His research and prototyping work includes custom CPU cores, NoCs, and SoCs using Verilog on FPGAs, plus practical experience in PCB layout, VLSI layout basics, and semiconductor failure analysis using optical, SEM, FIB and occasional TEM microscopy. An active contributor to open-source tooling, he’s improved SAT-solving and simulation features in the widely used Yosys synthesis suite, reflecting his blend of tooling-level impact and low-level systems expertise. Based in Seattle, he also volunteers as a wilderness first responder, underscoring a pragmatic, mission-focused approach to problem solving.
12 years of coding experience
Github Skills (8)
verilog10
c-language10
cprogramming-language10
simulate9
emulation9
simulator9
simulations9
simulation9
Programming languages (15)
Github contributions (5)
YosysHQ/yosys
Feb 2014 - Sep 2017
Yosys Open SYnthesis Suite
Role in this project:
Back-end Developer
Back-end DeveloperContributions:170 commits, 36 PRs, 20 comments in 3 years 7 months
Contributions summary:Andrew made significant contributions to the Yosys Open SYnthesis Suite, primarily focused on enhancing the SAT solver functionality. Their work included the addition of a new argument "-dump_fail_to_vcd" to the SAT solver, and the implementation of the Verilog System Task, $finish(). The user also implemented, improved and expanded upon system tasks like $display and the GreenPak4 counter functions to support user logic and added more simulation models.
yosys
azonenberg/yosys
Aug 2017 - Feb 2018
Yosys Open SYnthesis Suite
Contributions:78 commits, 2 PRs, 249 pushes in 6 months
yosys
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