Are you ready to lead the energy transition?

Welcome to FNX

If you’re passionate about sustainability, innovation, and want to be part of a team that is shaping the future of clean energy, you’ve come to the right place.

At FNX, we are on a mission to revolutionise the biomethane industry with cutting-edge engineering and manufacturing solutions.

We are based near Bilbao in the Spanish Basque region, and since 2022, we form part of CycleØ, a global growth-stage company that develops, builds, owns and operates biomethane projects.

Operating from our expansive 7,000 sqm facility, we develop and manufacture biogas upgrading and liquefaction plants, which are then installed directly at project sites.

Welcome to FNX

FNX in figures


Years of industry experience

Since 2013, FNX has been at the forefront of LNG innovation, and in 2019, we embarked on our journey towards renewable energy (See our story).


Green Enthusiasts

We are a team of committed and passionate individuals, adopting a hands-on approach to make a positive impact.


Plants in operation

Our mission is to design, manufacture and install over 50 plants by 2028.

Our culture

Together, we celebrate successes, overcome challenges, and drive positive change in the biomethane industry. 

“The value ‘Keep it Human’ has made a real difference in my time with the team. The collaboration between the manufacturing and engineering teams is great. Everyone is sharing knowledge and open to new ideas, making it not only a productive but also an incredibly fulfilling work environment.”


Igor Izaguirre Barrenechea

Warehouse Supervisor

“From day one, I’ve felt empowered to take ownership of my tasks and projects, knowing that my contributions matter. This trust has not only allowed me and my team to thrive, but also instilled a deep sense of responsibility and pride in the work we do.”


Iñigo Guemes

Head of Engineering

“Being an integral part of our commercial activities, embracing the principle of ‘Be Proactive’ has become second nature. In our dynamic business setting, it is the key to staying ahead in the market, to identify new opportunities, anticipate market shifts, and pioneer new strategies.”


Aitor Elua

Sales Manager, Spain

“Working in an environment that encourages and values innovation has been an energising experience. Each day brings new challenges, and our collective focus on innovation allows us to tackle them head-on. Seeing our ideas turn to life is extremely rewarding.”


Mechanical Engineering Manager

Daniel Benavides

“At the heart of our operations lies a steadfast commitment to sustainability, a value ingrained in our identity as builders of biomethane plants. From the inception of our projects, sustainability guides our decisions, influencing everything from design to implementation. Our journey is a testament to the belief that business can be a force for good, leaving a positive and lasting imprint on the environment.”


Jordi Berengue

General Manager, Spain

Fondo 2 Home Integral solutions FNX

Join the team that’s making biomethane happen in Europe and beyond!

At FNX, we engineer our own upgrading and liquefaction plants from the ground up. Working hand in hand with our colleagues at CycleØ, we are committed to introducing more carbon-negative solutions to the biomethane market.

For you, this means you’d get to work with a team of committed and passionate people, be able to innovate and enact change in an environment that encourages initiatives and accountability, all while boosting your career. 

Ready for your next career move? 

Explore our current openings and embark on a journey to shape a cleaner, more sustainable future. 


Mechanical Engineer

You will be supporting the design, construction, and commissioning of integrated biomethane plants, in addition to participating in innovative process and product development.

Procurement Engineer

You will oversee the organization’s sourcing capabilities and be responsible for acquiring goods and services of the highest quality at the most optimal cost.

Don´t see a vacancy matching your profile?

We´re always looking for purpose-driven people to support our mission.
Send us your CV and a cover letter by clicking on the button below.

Picture yourself at FNX

FNX christmas dinner
FNX christmas dinner
FNX christmas dinner
FNX christmas dinner
FNX in Valladolid
FNX in Valladolid
FNX in Valladolid
FNX in Valladolid