Chief of Staff / Founders Associate (Sales Focus) - (m/f/d)

🌍 About Cozero

Cozero is an enterprise carbon management platform helping manufacturers, logistics companies, and retailers turn scattered emissions data into business decisions: carbon accounting, reduction planning, and audit-ready ESG reporting in one place.

We are evolving fast. Our next chapter moves beyond carbon accounting into financial decision-making, connecting emissions data directly to cost and investment decisions, with the CFO as a key stakeholder.

60+ enterprise customers. Series A funded. Growing.

For this role you need fluent German and English (C1).

🚀 About the Role

You work directly for Helen, our CEO. Your mission is simple: increase our CEO's commercial capacity.

Helen closes our largest enterprise deals herself. What she lacks is time: preparation, follow-through, coordination between meetings. That is your job. You sit inside live deals, you prepare the materials that win them, and you make sure nothing agreed in a meeting dies afterwards.

This is not a generalist "bit of everything" role. Around 70% of your time is commercial execution alongside Helen. The rest is a small number of defined special projects she delegates to you, each with an owner, a deadline and a definition of done.

It suits someone 2 to 4 years into their career who wants to learn enterprise sales and company building from the inside, at founder speed.

🎯 What You’ll Do

• Prepare strategic enterprise deal meetings: account research, stakeholder maps, decision materials, pricing scenarios.
• Own follow-through on live deals: next steps, internal coordination, CRM hygiene on Helen's opportunities.
• Draft board-ready and customer-ready documents in English and German.
• Run defined special projects end to end, for example a partnership pilot or a market analysis, and report back with a recommendation.
• Coordinate across Sales, Customer Success and the climate team so commercial commitments actually get executed.

• 2 - 4 years of professional experience in a demanding environment, such as a startup, banking, consulting, or a fast commercial role.
• Experience supporting or driving commercial or revenue-relevant initiatives, directly or indirectly.
• Structured written communication. Your one-pagers get read.
• Comfort with ambiguity paired with an instinct to create structure, never wait for it.
• Fluent German and English (C1+). Customer-facing work happens in German.
• You are Berlin-based or willing to relocate.

• Within 3 months, Helen's deal preparation runs through you and meetings start sharper.
• Deals Helen touches move faster because follow-through no longer depends on her calendar.
• You have shipped your first special project with a clear recommendation.
• After 12 to 18 months you have earned a path into a commercial or operational leadership role.

• Founder proximity: you work with Helen daily, on the real thing, from day one.
• Real impact: your work directly supports measurable decarbonisation at enterprise scale.
• Fast development: flat structure, short feedback loops, real responsibility.

This is a hybrid role based in Berlin.

Our commercial team typically works from the Berlin office 2–4 days per week.

🌱 Compensation & Benefits

€55,000 – €75,000 gross annual salary per year, depending on experience.

You’ll also receive:

• 27 vacation days + 1 day life event leave + national holidays (Depends on location)
• €500 annual learning and development budget
• VSOP (Virtual Stock Options) - share in Cozero's success
• Regular team events every year