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Key Account Manager (f/m/d)

Join H-TEC SYSTEMS in Augsburg or Hamburg as a Key Account Manager. Lead key accounts in hydrogen and industrial sectors, develop strategic partnerships, and close major deals. Benefit from flexible work, a buddy programme, and employee discounts while shaping the energy transition.

Flexible Full time UTC+01:00 Updated today

Applies on career.questone.com

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Quest One is a global leader in PEM electrolysis. Our goal is clear: we aim to make a significant impact in reducing greenhouse gases with our electrolyzers. Since our beginnings as a science project in 1997, we've grown into a subsidiary of Volkswagen Group with around 500 employees across three locations worldwide.

Our mission: Drive climate protection and actively shape the energy transition. Are you ready to join us on this journey?

Our goal: Reduce 1% of the world's greenhouse gases by 2050. Quest One.

Your Responsibilties

  • Develop and manage key accounts across refineries, green steel, utilities, EPCs, and industrial hydrogen sectors.
  • Build and maintain strong relationships with senior stakeholders across industrial players, utilities, EPC contractors, and project developers.
  • Identify and originate new business opportunities, including pilot projects, Power-to-X applications, and early-stage collaborations.
  • Develop and manage strategic partnerships with EPCs to position the company in large-scale project tenders and consortia.
  • Drive the development of long-term commercial agreements and framework partnerships.
  • Lead the sales process from opportunity identification through to contract signature, including consortium-based bids.
  • Collaborate closely with the VP Sales on strategic account planning, partner selection, and deal structuring.
  • Work cross-functionally with engineering, project development, and finance teams to shape bankable project concepts.
  • Monitor market trends, regulatory developments, and competitive landscape within industrial hydrogen, utilities, and EPC ecosystems.
  • Represent the company at industry events and with key external stakeholders.

What You Bring

  • Bachelor's or Master's degree in Engineering, Business, or a related field.
  • Solid experience in key account management, business development, or sales within energy, utilities, EPC, industrial gases, hydrogen, or related sectors.
  • Strong network within refineries, utilities, EPCs, steel, or industrial decarbonization sectors is highly desirable.
  • Proven track record of developing and closing complex, high-value deals, including consortium or EPC-led projects.
  • Experience with large-scale infrastructure, energy systems, or utility-scale projects is a strong advantage.
  • Strong commercial acumen and ability to structure complex partnerships and multi-party agreements.

Why Quest One?

  • OWNERSHIP - We grow together with Quest One, and you have the opportunity to take active responsibility.
  • ONE TEAM - A strong team that sticks together and shapes the future.
  • LEARNING - Personal growth is our focus, with numerous development opportunities.

Your Benefits

  • Flexible work arrangements for a good work-life-balance.
  • Regular updates and transparent communication through our town-hall-meetings.
  • Buddy program as part of onboarding.
  • Daily lunch allowance.
  • Attractive employee discounts with Corporate Benefits and FutureBens.
  • Free drinks, fruit, and a JobRad for a greener commute.

Do you want to help shape the future with us?

Then apply now at Quest One and become part of a team that truly makes a difference.

At Quest One, we're looking for people who want to actively help shape the future. What matters to us is your talent and motivation-your background, skin color, religion, gender, sexual orientation, age, or disability doesn't matter. Our diversity makes us stronger, more creative, and more successful. Together, we grow as a team in an inclusive and sustainable environment where discrimination has no place. Join a global company that values diversity and is committed to equal opportunities.

Pay & benefits

Flexible hours Meal allowance

Typical pay for similar roles

Estimate
€42,000–78,000 annually
Mid level · Germany · 81 similar jobs

The middle half of pay advertised on Rejobs for this group over the last 24 months. This employer has not stated a salary.

About this role

Posted
27 Oct 2026
Updated
27 Oct 2026
Job type
Full time
Workplace
Flexible
Sectors
Working hours
UTC+01:00
Experience
Solid experience in key account management, business development, or sales.

About H-TEC SYSTEMS

Company Overview

Name

Quest One GmbH (formerly H-TEC SYSTEMS), a subsidiary of MAN Energy Solutions

Headquarters

Augsburg, Germany

Founded

1997

Size

Approximately 600 employees across three global locations (source: pitchbook.com)

What They Do

Quest One GmbH, formerly known as H-TEC SYSTEMS, is a leading company in hydrogen technology specializing in the development and manufacturing of PEM electrolyzers and electrolyzer stacks for green hydrogen production (source: questone.com). The company provides efficient, flexible, and reliable solutions for converting electricity into hydrogen and positions itself as a technology leader in the Power-to-X value chain (source: questone.com). Their core technology is the electrolyzer stacks, which form the heart of the electrolyzers and are manufactured industrially on a large scale (source: questone.com). Key customers are primarily industrial users and project developers who require scalable hydrogen production plants for decarbonization and energy transition applications (source: wasserstoffwirtschaft.sh). A distinctive feature is the industrial series production at a new facility in Hamburg, which, at full capacity, is expected to enable an annual electrolyzer capacity of over 5 GW (source: questone.com). Final assembly follows an automotive-style production principle at the Augsburg site (source: questone.com).

Projects & Track Record

Quest One focuses on expanding industrial manufacturing capacities rather than individual large-scale projects. A major milestone is the opening of the new production and development center in Hamburg in September 2024, which will enable automated series production of electrolyzer stacks with a capacity exceeding 5 GW per year (source: questone.com). Final assembly of completed stacks and electrolyzers continues at the Augsburg site (source: questone.com). The company boasts over 25 years of experience in hydrogen technology and has significantly contributed to the development of the hydrogen economy with its technology (source: questone.com). Its geographic presence includes Germany as well as the USA, with a location near Houston, Texas (source: questone.com).

Recent Developments

In August 2024, H-TEC SYSTEMS was renamed Quest One, coinciding with the opening of the new production facility in Hamburg and the start of series production of electrolyzer stacks (source: questone.com). The company aims to reduce at least one percent of global greenhouse gas emissions by 2050 through the use of its electrolyzers (source: questone.com). In 2024, Quest One is described as a global market leader in PEM electrolysis and employs around 550 people across its Hamburg, Augsburg, and Houston locations (source: questone.com). Production capacity in Augsburg and Braak was already expanded in 2023 to strengthen its role as a partner in the energy transition (source: wasserstoffwirtschaft.sh).

Working There

Quest One offers diverse employment opportunities in engineering, production, research & development, quality assurance, supply chain, sales, communications, and project management—roles typical for industrial manufacturing and scaling (source: questone.com). Employees are organized by location: Augsburg specializes in final assembly, Hamburg focuses on stack development and production, and Houston supports the North American presence (source: questone.com). The corporate culture is characterized by growth, automation, and technical innovation in hydrogen systems, making it especially attractive for professionals seeking to work in a fast-growing, international high-tech environment (source: questone.com).

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