# Joseph Sahyoun > Control Systems Engineer Location: San Francisco Bay Area, United States Profile: https://flows.cv/josephsahyoun Control systems engineer in the 3D printing industry. ## Work Experience ### Senior Product Quality Engineer, Robotics & Controls @ Noah Medical Jan 2024 – Present ### Senior Control Systems Engineer @ Carbon Jan 2022 – Jan 2023 | Redwood City, California, United States • Developed and maintained production control algorithms for multiple 3D printer subsystems in C++ • Lead controls engineer for the Oxygen Subsystem. Responsibilities included implementing novel control algorithms, managing state machines, improving plant design, tuning actuators, and troubleshooting bugs • Designed a cascaded I-controller to regulate oxygen partial pressure in a system with a 10 minute transport delay • Implemented a gain scheduling algorithm to prevent the mass flow rate controller from amplifying flow perturbations • Performed root cause analysis on Oxygen Subsystem field failures and promptly addressed issues to unblock customer projects • Designed and implemented a real-time resin level detection feature which used force telemetry and digital filtering techniques to precisely determine resin volume during printing within +/- 50 mL • Used field telemetry data queried from AWS relational databases to simulate and test the production resin level detection algorithm against a true positive dataset ### Control Systems Engineer @ Multibeam Corporation Jan 2018 – Jan 2021 | Santa Clara, CA • Lead designer of a 3-DOF active vibration isolation platform capable of isolating and positioning a 100 kg wafer stage with double-digit nanometer precision • Developed and implemented a PID control algorithm to attenuate ground vibrations entering the stage up to 10X more than the existing passive solution • Modeled and simulated isolator control algorithms and digital filters in Python, targeting specifications such as control bandwidth, damping ratio, overshoot, steady-state error, gain/phase margins, and stability • Assisted in the development of stage motion control algorithms by implementing new filter designs, testing and tuning new controllers, and configuring hardware within the motion controller environment • Implemented controllers with C/C++ and verified closed loop performance using telemetry from linear encoders and single axis accelerometers • Designed systems in CREO 5.0 and performed modal analysis in ANSYS to validate derived dynamic models. Corroborated simulation results with results from system identification and hand calculations ### Corporate Compliance Engineering Intern @ Cisco Systems, Inc. Jan 2016 – Jan 2016 | San Jose, California ● Performed seismic and atmospheric testing on Cisco products to ensure the design was compliant with NEBS requirements ● Collaborated with design and test engineers to develop test fixtures ● Designed and manufactured a single piece weight rack that eliminated the need for a second person during set up ### Mechanical Engineering Intern @ Etched Media Corporation Jan 2014 – Jan 2014 | Campbell, CA I was tasked with reverse engineering a silk-screen printing machine so that it could accommodate printing jobs up to two feet in height. I designed a steel platform which could be raised and lowered by four lead screws connected via pulleys and a timing belt. The motion was powered by a DC motor. This project involved: • A complete redesign of the original printing chassis in which the printing base was widened and lowered • Functional understanding of the mechanisms that operated the printing arm • Knowledge of machine design concepts to size motors, bearings, lead screws, pulleys, and belts • Collaboration with computer and electrical engineers on control of the DC motor and printing arm ## Education ### Masters of Engineering in Mechanical Engineering UC Berkeley College of Engineering ### Mechanical Engineering Major and Physics Minor Santa Clara University ### Junipero Serra High School ## Contact & Social - LinkedIn: https://linkedin.com/in/josephsahyoun --- Source: https://flows.cv/josephsahyoun JSON Resume: https://flows.cv/josephsahyoun/resume.json Last updated: 2026-03-29