Principal Control Systems Engineer (f/m/d)

About Focused Energy

Focused Energy is building the future of clean energy through laser-driven inertial fusion. Backed by our $240M Series A - the largest fully secured Series A in the global fusion industry we are scaling rapidly across multiple geographies.

Based in Germany and the US, we have brought together the top scientific and engineering minds using proven technologies to unlock fusion power at commercial scale. Focused Energy is working to realize game-changing scientific innovation that promises to deliver a clean, sustainable and abundant source of power globally.

What You’ll Do

Design the system‑level architecture for control systems across facilities, making strategic platform and technology choices in collaboration with program and system owners

Direct real‑time and embedded control solution implementation, selecting and guiding use of PLC, FPGA and other real‑time platforms, balancing performance, reliability, safety and cost trade‑offs

Work together with system integrators, electrical engineering, cabinet builders, and technicians to specify, design, review, test, install, and commission control cabinet hardware and field devices

Work together with the software team to architect and deliver fully integrated SCADA, HMI and data systems for alarms, logging, historian, analytics, data reduction, dashboards, etc., ensuring scalability and high performance

Orchestrate system integration across multiple complex subsystems and teams; define observability, logging and diagnostic strategies and lead root‑cause investigations and post-mortem studies of active systems to deliver lessons learned and contribute to continuous availability improvement

Shape requirements, documentation and validation approaches at system level, including design specs, interfaces and test strategies for reliability, safety and long‑term maintainability

Coach and mentor senior and junior engineers, identify capability gaps, grow technical capabilities in key skill areas, and champion best practices for software engineering, testing, quality, and ways of working within the controls team and beyond

Who You Are

Degree in Electrical/Electronic Engineering, Control/Automation, Mechatronics/Robotics, Physics or similar; PhD or equivalent experience preferred, with recognition as a technical expert in control/embedded or real‑time systems

Typically 10+ years in control/embedded systems, factory or plant automation, automated test systems, or complex scientific experimental work, with architectural ownership across multiple projects or products

Deep experience in at least one relevant domain (e.g., high energy lasers, nuclear, robotics, power/energy, automotive, aerospace, industrial automation) with understanding of domain constraints standards and regulations, as well as supplier ecosystems and main players

Proven track record specifying control cabinet hardware; defining house standards, ensuring compliance with regulations, liaising with system integrators, and creating test plans and quality control processes

Proven track record specifying control software and/or SCADA and data acquisition systems; defining interfaces, patterns and coding standards across teams, and guiding technology trade‑offs

Extensive experience with embedded and real‑time platforms (e.g., PLCs in ST IEC 61131‑3, FPGAs, RTOS‑based systems, robotics), including selecting platforms and scaling architectures with clear RAM vs cost/reliability trade‑offs

Understanding of software/firmware engineering best practices (version control, branching, design for test, CI/CD, automated testing, defensive programming) and experience introducing or improving these practices, and organizing or conducting training programs across teams or organizations

Excellent communicator (English), able to influence technical direction at organization level, handle and resolve ambiguities in requirements and processes, and build alignment across hardware, software, product and operations teams in hybrid, cross‑site environments

Practical, hands‑on approach with a strong track record orchestrating large‑scale HW/SW integration, resolving integration challenges, and leading complex debugging and fault‑finding on real systems

Desirable skills and knowledge (please highlight any of the following in your application):

Deep experience with PLC programming in ST (IEC 61131‑3); Beckhoff PLCs and TwinCAT system design and architecture, multi-PLC distributed control

SCADA (especially Ignition) and/or designing and deploying SCADA systems and applying cross-site HMI standards for large-scale and complex systems

Embedded or real‑time systems (FPGAs, RTOS, microcontrollers, robotics), including platform selection and long‑term maintainability strategies

LabVIEW architect level (CLA) with focus on FPGA and embedded targets,

Experience with complex scientific equipment or large‑scale facilities, including diagnostics, vacuum systems, motion platforms and safety interlocks

Image processing and machine vision, motion control and robotics, high‑precision stepper/piezo systems and encoders

What We Offer

Innovative Technology & Mission: Be part of a cutting-edge company working on groundbreaking research in clean energy and scientific discovery.

Career Development: We invest in our people. This is an opportunity to join an early, growing company at the forefront of new technology, where you’ll have the opportunity to develop and grow your career.

Collaborative Culture: Work with great people in a dynamic, international environment with top-tier scientists, engineers and professionals passionate about solving global challenges.

Ownership: Take ownership from day 1 and drive impact by making decisions, solving challenges and shaping the future of our company.

Your Success is our Success: We offer a competitive salary and company ownership in the form of stock options, giving you a direct stake in our success and ownership in what we build together.

Vacation Days: We support your work-life-balance by granting you 30 days of vacation per year.

Snacks and Drinks: Our office fridges are never empty. Enjoy our healthy snacks and drinks. Our Darmstadt office even offers a canteen with delicious lunch options daily.

Retirement Plan: If you decide for a private pension plan, we will finance 20% on top of your monthly contributions, plus loyalty incentives.

Equipment: We offer state-of-the-art Windows or Apple Laptops. In addition, you will receive a keyboard, mouse and headset so you are fully equipped from day 1.

Events: We organize regular events to foster team bonding, encourage collaboration, and build a strong, supportive company culture. Connect with colleagues across departments, share ideas, and have fun together, both in and outside of the workplace.

Mobility with NAVIT: We partner with NAVIT to support your flexible commuting needs whether it’s a public transportation ticket, taxi rides or car-sharing you choose what fits your lifestyle.

Fitness with Wellhub: We care about your health. Get access to a wide range of gyms, fitness studios and wellness services across Europe through our partnership with Wellhub.

Focused Energy is an equal opportunity employer committed to creating an inclusive environment. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, or disability status.

Pursuant to the San Francisco Fair Chance Ordinance, Focused Energy will consider for employment qualified applicants with arrest and conviction records.

Compensation offered will be determined by factors such as location, level, job-related knowledge, skills, and experience. Certain roles may be eligible for incentive compensation, equity, benefits.