Supercritical is looking for a Lab Technician to join our lab research and development team, based in West London. The role will suit an applicant with a good background in lab-based experimentation. This is an opportunity to join an exciting and purpose-driven startup. 

You will join an exciting and fast moving company that is intent on disrupting the energy industry and enabling a net zero future.

‍

What you’ll do: 

• Conducting high-quality testing to support product development
• Assembly and disassembly of test hardware and test equipment
• Adhering to test procedures to meet research and development requirements
• Assisting in the improvement of testing procedures and processes to enhance the quality and consistency of testing
• Calibrating and maintaining equipment
• Meeting testing deadlines as per the plan
• Reporting any variances or issues that affect test results
• Collaborating with a team to achieve goals
• Strictly following all safety and operating procedures in the lab
• Coordinating and communicating work with the wider team

‍

Ideally, you will have:

• Experience in lab-based research/testing
• Strong analytical skills, problem-solving abilities, and a team-oriented attitude
• Experience with high pressure and high temperature fluid systems, with knowledge of supercritical water conditions being an advantage
• Experience in maintaining and operating test stands
• Knowledge of risk assessments & good lab practice.
• A passion for product development and a commitment to a net-zero environment
• Strong organisational and communication skills
• Proactivity and self-motivation
• Knowledge of laboratory health and safety protocols
• Ability to understand and execute standard operating procedures
• Familiarity with unexpected results or issues

‍

Desirable

• Experience in electrolyser cell system testing
• A degree in science or engineering
• Basic knowledge of data logging and hardware control
• Experience in automation, high-throughput experimentation, data science, programming, and research development
• Knowledge of HAZIDs and HAZOPs
• Training in first aid and fire warden for a lab/workshop environment
• High-level understanding of electrochemical technology and equipment for troubleshooting purposes.

‍

The Mission

At Supercritical, we aren’t just building another electrolyser; we are developing the world’s first high-pressure, ultra-efficient system to make green hydrogen affordable. By eliminating the need for expensive compressors and "forever chemicals" (PFAS), we are removing the biggest barriers to a zero-carbon industrial future.

We are growing fast. While we might not have a live vacancy that matches your exact profile today, we are always looking for the "Supercritical" people of tomorrow: the problem solvers, the tinkerers, and the climate-obsessed.

Who We Look For

We are a mission-driven team of electrochemists, mechanical engineers, data geeks, and pioneers. Even if your specific job title isn't listed, we want to hear from you if you are:

• A Technical Trailblazer: You might be an expert in high-pressure fluid systems, power electronics, or complex chemical modelling.
• A Data-Driven Thinker: You love turning "messy" experimental data into actionable insights using Python, SQL, or time-series analysis.
• A Creative Operator: You thrive in the ambiguity of a startup and enjoy building processes where none existed before.
• A Mission Ally: You are genuinely passionate about deep-tech solutions to the climate crisis.

What Life at Supercritical Looks Like

• Radical Transparency: We share our wins, our failures, and our data openly across the entire team.
• High Autonomy: We hire smart people and get out of their way. You will have the freedom to own your projects from day one.
• Hybrid and Balanced: We work from our West London lab and office to collaborate in person, but we embrace flexibility (typically 2 to 3 days remote) and respect your time outside of work.

The Perks

• Family First: 3 months of full-pay parental leave for all parents.
• Investing in You: Support for professional training, accreditations, and technical subscriptions.
• The Basics (But Better): Competitive pension (5% employer contribution), monthly team lunch outings, and milestone celebrations.
• Sustainable Culture: Work in a PFAS-free and iridium-free environment focused on "forever" solutions.

How to Apply Speculatively

Click "Apply" and send us:

1. Your CV.
2. A short note: It does not have to be a formal cover letter. Just tell us what specific area of Supercritical excites you and what kind of impact you want to make.

Note: As a high-growth startup, we review speculative applications periodically. If a role opens up that aligns with your skills, we will be in touch!