Lab Technician (12 month contract)

London, United Kingdom

Job Title - Lab Technician

Location - Supercritical Global Technology Centre, West London, UK

Type - 12 Month Contract

Salary - £30,000 - 38,000 (£638 - £808 Per 40 hour week) - Experience Dependant

Your employment structure will be as a contractor to Supercritical - i.e. You will invoice for the days that you work , and you will manage tax yourself. We can help explain this structure if it is new to you. You will not be on a PAYE employment contract.

You will be able to take 25 days (+ bank holidays) per annum pro rata as unpaid leave.

Holiday - N/A

We are committed to finding the best candidates, so if you’re excited by the prospect of joining Supercritical then we encourage you to apply, even if you don't meet all of the requirements. Your unique skills and experiences may be exactly what we're looking for.

Whether you’re motivated by technical challenges, opportunities for growth, or being part of a mission-driven organisation, you’ll find a welcoming environment at Supercritical. We value trust and transparency.

Supercritical is proud to foster an inclusive environment. We believe diversity drives innovation and we ensure that every team member feels welcomed, valued, and empowered to succeed. We encourage applicants of all genders, ethnicities, backgrounds, and abilities to apply and help shape the future of clean energy.

Other Benefits

An exciting and dynamic start-up environment

Flexibility and Supportive of Balance

- Flexible start and finish times

Growth Opportunities - wide range of exposure and development

Monthly Team Days & Lunch Outings

Team Milestone Celebrations

Learn more about us at the end of this document or at www.supercritical.solutions.

Please note that we are not in a position to offer sponsorship. Applicants must have the right to work in the UK for the role that they are applying for.

The Opportunity:

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

About you

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.

About Supercritical

Supercritical is transforming the future of green hydrogen production with the world’s first high-pressure, ultra-efficient water electrolyser. Our groundbreaking technology uses heat and pressure to achieve the highest electrical efficiencies in the industry, producing hydrogen at high pressure for seamless storage and transport. By also co-producing oxygen, our innovations support decarbonisation in heavy industry, chemicals, transport, and more.

We are a well-funded team with years of runway and strong partnerships with leading global organisations. Our mission is to make green hydrogen affordable and sustainable, enabling a cleaner, more equitable future. By eliminating the costly and complex equipment required by traditional electrolysis, we are driving down the cost of green hydrogen and making it accessible to industries around the world.

We live by our values at Supercritical:

Purpose in creating a legacy, driving positive change, for sustainability in all we strive for
Transparency in the way we work, the way we share, in our honesty
Partnership to achieve shared goals, to collaborate at all levels, to welcome challenges and different points of view
Trust in our colleagues, in the rigour of our delivery, in respect for others
Leadership in finding breakthroughs, empowering actions, innovating
Curiosity in celebrating ideas, championing our passions, being positively restless

What Makes Us Proud:

Our patented technology is redefining industry standards.
We’ve demonstrated world-leading electrochemical efficiencies out of the lab.
We are committed to sustainability, designing systems free from PFAS forever chemicals and rare earth metals.
We’re recognised globally:
Featured in CleanTech Group’s "Top 50 to Watch for Climate Action."
Named a StartUS Insights "Top 5 Zero Emission Solution to Watch."
Runner-up and People’s Choice in Shell’s 2021 New Energy Challenge.
Finalist in OZ Minerals' Hydrogen Hypothesis.
Highlighted in CEMEX Ventures’ Most Promising CleanTech Solutions.
Listed among Start Up Energy Transition’s "100 Most Promising Global Energy Startups."
Named “ClimateHack’s top 150 ClimateTechs to watch”

At Supercritical, we believe that innovation thrives when diverse perspectives come together. We’re building a collaborative, inclusive team to create ultra-efficient, cutting-edge solutions for a sustainable future. Join us in solving some of the world’s toughest energy challenges and making a real impact on the path to net zero.

What it's like to work here:

At Supercritical, we’re not just building cutting-edge technology—we’re shaping the future of clean energy. Working here means being part of a fast-moving, deeply collaborative team that thrives on innovation, curiosity, and impact. We operate with trust and transparency, valuing diverse perspectives that drive better solutions. Our culture is dynamic and ambitious, but also supportive—everyone has a voice, and great ideas come from everywhere. Expect to work alongside passionate experts who challenge the status quo, celebrate wins together, and push boundaries to make green hydrogen affordable and accessible. Whether it’s solving complex engineering problems, securing partnerships, or scaling our breakthrough technology, every role at Supercritical is mission-driven. If you’re looking for a place where your work genuinely matters, where you can grow, and where you’ll be empowered to take ownership, you’ll feel at home here.