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 Everllence 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.

• You are responsible for the design, implementation, and further development of the IT and OT security strategy.
• You cooperate on operational security-related issues, including log analysis, incident response, vulnerability management, and coordination of penetration tests.
• You establish and maintain a comprehensive security architecture across both IT and OT environments.
• You implement and support security tools such as SIEM, EDR, firewalls, IDS/IPS, IAM, and OT monitoring solutions.
• You conduct and support audits in accordance with ISO 27001, IEC 62443, and KRITIS requirements.
• You perform risk analyses and derive appropriate protective measures against cyber threats.
• You work closely with IT, OT, production, and external service providers.
• You advise management on risks, compliance requirements, and investments in the security landscape.

• You hold a degree in computer science, IT security, or a comparable qualification.
• You have several years of professional experience in IT and/or OT security, ideally within an industrial environment.
• You hold at least 1 certificate in general information security like CISSP, CISM, CISA.
• You demonstrate a hands-on mentality and the ability to operate security tools independently.
• You bring experience in network security for both office and production environments, including firewalls, endpoint security, identity management, and ideally security solutions in OT environments (e.g. SCADA, ICS).
• You possess knowledge of relevant security standards such as ISO 27001, NIS2, KRITIS, and IEC 62443, as well as familiarity with common tools.
• You think analytically, communicate effectively, and convey complex topics in a clear and understandable manner.
• You perform your duties with due care, confidentiality, and in accordance with internal guidelines and applicable laws.
• You are fluent in written and spoken German and English.

• 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.

• 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.
• 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.