Are you ready to lead our commercial expansion in Europe?

We are now hiring a Chief Sales Officer (CSO) to translate our technical strengths and market insight into a structured international growth journey

Cartesian is entering a pivotal growth phase, moving from project-based deliveries to scalable international expansion. As Chief Sales Officer, you will define and build the company's commercial platform in Europe - with ownership of strategy, partnerships, and execution, and the opportunity to shape how Cartesian wins in the market.

You will lead the commercial expansion in Europe, driving momentum with a stronger pipeline, increased sales activity, and a clear commercial position in priority markets. Working closely with the leadership team, technical organisation, and owners, you will help establish partner ecosystems, sales processes, and commercial capabilities that enable scalable growth.

This role suits a hands-on, yet strategic leader who thrives in a fast-moving scale-up environment with huge potential. You bring strong relationship skills, sound judgement, and a motivation to create lasting impact. As our new CSO, you will play a key role in shaping and building the company and its processes, as well as your own role as Cartesian grows.

Key responsibilities (selection)

• Define and execute Cartesian's commercial and go-to-market strategy in Europe
• Build and scale a partner-based sales model through installers, system integrators, ESCOs and consulting engineering firms
• Identify and develop key strategic partners and hold global account responsibility
• Be hands-on in sales and partner dialogues, particularly in new markets and early-stage collaborations
• Drive pipeline development and sales growth with measurable results
• Establish scalable sales processes, frameworks and tools
• Build and lead a commercial team over time, in line with company growth

Background and experience

• International B2B sales of technical solutions, ideally in energy, HVAC, real estate, commercial buildings, or related sectors, with experience in partner- and channel-based models.
• Proven track record in building or scaling commercial organisations in scale-ups or smaller to mid-sized companies.
• Skilled in navigating complex buying processes with multiple stakeholders, combining strategic thinking with hands-on execution.
• Strong commercial and technical understanding, with excellent English skills; additional languages are a plus.

What Cartesian offers

• A central leadership role with real influence in a high-potential European scale-up.
• The opportunity to build processes, teams and commercial momentum from an early stage.
• Close collaboration with experienced leaders, strong ownership and high autonomy.
• A professional, ambitious and down-to-earth culture where we aim to bring out the best in each other.
• Competitive compensation aligned with responsibility and experience.

If you have any questions or wish to discuss how your background aligns with the position, please feel free to contact our recruitment partners in ADA AS for an informal and confidential conversation; Øyvind Grimstad (oyvind@ada.no / +47 47 26 58 74) or Ingrid Johansen (Ingrid@ada.no / +47 46 42 98 92)

Cartesian AS delivers scalable and compact thermal energy storage solutions for commercial buildings. Our technology helps reduce heating and cooling operating costs, improves resilience, and strengthens energy supply security. The products are deployed and in commercial operation in multiple European markets.

Cartesian is backed by strong owners and led by an experienced management team.

The demand for energy storage is growing rapidly, driven by grid constraints, energy security demands, and increasing sustainability requirements. Cartesian is now scaling across Europe, with a clear focus on the UK, the Netherlands, and Belgium. We operate through a partner-based go-to-market model and collaborate closely with HVAC system integrators, specifiers, and installers.