Senior Controls Engineer (I, II, III)

South San Francisco, CA
Engineering - Development – Controls & Electrical Engineering /
Full Time /
We are seeking an innovative and highly motivated controls engineer who will contribute significantly to the development of our advanced cell therapy manufacturing platform.

The primary focus of this position will be the design, implementation, and test/verification of control systems that form the core of our hardware platform. You will lead the architecture design and implementation of these hardware platforms, and help work with the software, mechanical and systems teams to bring up and validate new automation systems. This individual will interface across many parts of the company to develop novel products used in the cell therapy and gene therapy world.

Candidates should enjoy working in a fast-paced, mission-driven environment, and be prepared to tackle a broad selection of challenges as the company grows.


    • Lead the development of control systems integrating custom and off-the-shelf laboratory instruments and PLC-based control hardware
    • Drive component selection, prototyping, bring-up, debugging, documentation, manufacturing and test
    • Develop PLC control software using Structured Text and leveraging object oriented programming methodologies
    • Develop unit tests and functional tests for PLC code that you write, participate in code reviews, and leverage Git for version control and code management
    • Participate in design reviews and provide input to identify issues and drive design choices
    • Collaborate with the software team to develop robust, well documented software interfaces to hardware
    • Collaborate with external stakeholders including Systems Engineering, Quality, Mechanical Engineering, Process Development, etc. for project planning, requirements development, and architecture development
    • Collaborate with external suppliers and contract manufacturers 
    • Develop test software in Python, C# or other languages to validate subsystems during manufacture


    • Bachelors or Masters degree in Computer Engineering, Computer Science, Software Engineering, Electrical Engineering or equivalent experience is required
    • 5+ years industry experience developing control systems for customer-shippable life science instrumentation or comparable equipment 2+ years of experience in medical device design preferred
    • Experience as a technical/engineering lead on multiple projects incorporating motion control and basic process control
    • Experience with at least one major PLC platform (Siemens TIA Portal, Beckhoff TwinCAT3, B&R) or experience with hardware control using real-time operating systems (RTOS) such as VXWorks, QNX, INtime, etc
    • Proficient with IEC 61131-3 based languages with a focus on Structured Text
    • Proficient with object-oriented programming and have an understanding of how to apply OOP concepts to control software
    • Experience implementing and developing coding standards around industry standard control implementations, for example implementations following the ISA-88 hierarchical model
    • Experience reading and interpreting electrical drawings
    • Hands on experience with wiring, configuring and troubleshooting electrical and control systems
    • Proficient in the design of safety systems following IEC/ISO/RIA standards
    • Understanding of the proper integration and usage of safety relays, safety PLCs, light curtains, E-Stops, etc
    • Experience with fieldbus technologies such as EtherCAT, Profinet, EtherNet/IP
    • Experience with one computer programming language such as Python, C#, Java
    • Desire to work in a fast-paced, collaborative start-up environment
    • Self-awareness, integrity, authenticity, and a growth mindset

    • Nice to Haves
    • Proficiency in Python
    • Experience integrating and/or programming industrial articulated robots (i.e. Kuka, ABB, Staubli)
    • Experience with at least one major HMI software, such as Ignition, Wonderware, WinCC

$90,000 - $210,000 a year
Cellares total compensation package contains competitive base salaries, highly subsidized Medical, Dental, and Vision Plans, 401(k) Matching, Free EV Charging, Onsite lunches, and Stock options. All displayed pay ranges are approximate, negotiable, and location dependent.