Riley Scott Jacob

Systems Engineer · Physicist by training

rilscoja@gmail.com · github.com/riscj · riscj.dev

I run production IT infrastructure and security at a manufacturer, build interactive tools for teaching physics, and do vulnerability research on the side.

Experience

2022 – present

Systems Engineer

Midsize manufacturer

  • Sole engineer responsible for the company's entire IT environment and OT network, having modernized it from a flat legacy network.
  • Architect and maintain a 3-node Proxmox/Ceph hyperconverged cluster (~25 VMs and containers), identity and PKI, and a segmented network of 200+ devices, from workstations and servers to cameras, printers, PLCs, and press HMIs.
  • Designed and built ~10 production applications (Python/Flask/FastAPI, C++/Qt) used daily across manufacturing operations: machine and press monitoring, operational dashboards, barcode scanning and labeling, CAD search, and single sign-on.
  • Built an HRIS and timeclock platform end to end, including custom kiosk hardware with NFC-based multi-factor authentication.
  • Own security architecture and operations: access control, endpoint detection, incident response, vulnerability management, risk assessment, and governance toward ISO 27001 / CMMC.
2018

Virtualization Intern, then Contractor

American Axle & Manufacturing

  • Designed and built a MATLAB tool implementing an algorithm to simulate a destructive testing procedure; continued as a contractor through the fall to complete it.
  • The tool was put into production and, by later report, remains in use.

Security Research

2026

CVE-2026-44171

MariaDB

  • Discovered a path-traversal vulnerability in MariaDB's mbstream backup utility (CVSS 6.3). Disclosed through HackerOne via coordinated disclosure, and written up in detail.

Selected Projects

ongoing
  • Maxwell, an interactive electrodynamics textbook: eight chapters from waves to antennas, each backed by a real-time 2D finite-difference time-domain (FDTD) simulation in the browser. (Earlier version: a GPU-accelerated solver in C / OpenCL / OpenGL.)
  • QED Feynman Diagram Explorer, an interactive tool for visualizing scattering processes, Feynman diagrams, and their topologies.
  • Holographic Grating Machine, a two-beam interference system for recording 1200 lines/mm diffraction gratings on photoresist; part of a path toward Rydberg-atom electrometry.

Teaching & Outreach

2019 – 2020

Laboratory Teaching Assistant, AEP 1200

Applied & Engineering Physics intro lab, Cornell University

  • Ran lab sections and mentored students through an introductory experimental-physics course.
  • Demonstrated SEM imaging of individual carbon nanotubes by first locating them with an AFM, a measurement the lab had considered impractical.
2017 – 2020

President (2019–2020), Cornell Astronomy Society

Cornell University

  • Led the society and its weekly public-outreach program at Fuertes Observatory: Friday-night public lectures on the night sky, telescope viewing, and Q&A for the community.

Writing & Communication

ongoing
  • riscj.dev, long-form technical writing on physics, security, and the history of science, including faithful reproductions of original research papers.
  • Physics Stack Exchange, author of widely-read explanations across quantum mechanics, electrodynamics, condensed matter, and field theory.

Education

2022

B.A. Physics

Cornell University

Coursework in electrodynamics, quantum mechanics, statistical mechanics, and particle physics.

Technical Skills

Infrastructure
Proxmox, Ceph, routing/switching, VLAN segmentation, VPN, HA firewalls, 802.1X/EAP-TLS, hyperconverged virtualization
Identity & PKI
Active Directory, Kerberos, ACME, PIV/FIDO2, LAPS
Security
SIEM, EDR, conditional access, incident response, vulnerability research, ISO 27001, CMMC
Development
Python (Flask, FastAPI), C, C++ (Qt/QML), JavaScript, SQL, bash; OpenCL/OpenGL; FDTD / numerical simulation
Databases
MariaDB/MySQL, SQL Server, SQLite
Platforms
Linux, Windows Server, Microsoft 365, Raspberry Pi
Languages
Spanish (intermediate, B1–B2); Russian (advanced university coursework)