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Quest One Tech Stack

PEM electrolyzer manufacturer scaling production and OT security across Volkswagen Group

Renewable Energy Equipment Manufacturing Augsburg, Bayern 501–1,000 employees Founded 1997 Public Company

Quest One manufactures PEM electrolyzers for green hydrogen production and is actively scaling its operational technology infrastructure across multiple sites. The tech stack reveals industrial control expertise (PROFINET, Modbus, Allen-Bradley, Siemens S7 controllers, SCADA) paired with enterprise systems (SAP S/4HANA, Azure, Microsoft 365) and emerging OT security maturity (SIEM, EDR, ISO 27001, IEC 62443 adoption). Current project focus spans PEM product development, machine networking connectivity, and OT security hardening—reflecting the tension between operational expansion and industrial cybersecurity risk.

Tech Stack 29 technologies

Core StackAllen-Bradley SAP SAP S/4HANA OPC UA PROFINET MQTT Modbus Azure PowerShell Microsoft 365 SAP S/4HANA EWM SIEM EDR IAM SCADA OpenVPN SAP ECC ISO 27001 IEC 62443 IBM DOORS Polarion MBSE Microsoft Office Siemens S7-1200 Siemens S7-1500 Excel SharePoint SAP PM EPLAN

What Quest One Is Building

◆Challenges

Ensuring compliance with iso 27001
Implementing ifrs processes
Financial reporting
Risk mitigation
Security vulnerabilities in ot network
Performance bottlenecks in machine data communication
Connecting production plants to iot infrastructure
Cross-site project coordination
Optimizing cloud architecture
Implementing governance frameworks

▲Active Projects

Process implementation in erp
Annual financial close
Pem electrolysis product development
Ifrs-hgb transition
Developing connectivity concept for machine networking
Patent filing and prosecution
Development of innovative pem electrolyzers
Creation of calculation templates for component selection
Security concepts for ot environments
Siem and edr implementation

Hiring Activity

Decelerating40 roles · 8 in 30d

Department

Engineering

18

Security

4

Finance

3

Legal

3

Logistics

3

HR

2

Manufacturing

2

Ops

2

Seniority

Senior

12

Mid

11

Intern

9

Manager

6

Junior

2

Lead

1

Notable leadership hires: Product Development Lead

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About Quest One

Quest One develops and manufactures PEM electrolyzer technology for green hydrogen production. Operating since 1997, the company is part of the Volkswagen Group via Everllence and leverages automotive-scale manufacturing expertise. Headquartered in Augsburg with a second German site in Hamburg, the company expanded into the U.S. in 2024 with an operations office near Houston. The organization spans 501–1,000 employees across engineering, manufacturing, and enterprise functions, selling into heavy industry and energy infrastructure customers requiring large-scale electrolyzer deployment.

HeadquartersAugsburg, Bayern

Company Size501–1,000 employees

Founded1997

Hiring MarketsGermany, United States, Spain

Frequently Asked Questions

What is Quest One's tech stack for manufacturing and controls?

Quest One runs industrial protocols (PROFINET, Modbus, Allen-Bradley, Siemens S7-1200/S7-1500, SCADA, OPC UA, MQTT), enterprise SAP systems (S/4HANA, ECC, PM, EWM modules), and cloud infrastructure on Azure with Microsoft 365. Security tooling includes SIEM, EDR, IAM, ISO 27001, and IEC 62443 standards.

Where is Quest One headquartered and hiring?

Quest One is headquartered in Augsburg, Bayern, Germany, with operations also in Hamburg, Germany. The U.S. branch near Houston opened in 2024. Active hiring spans Germany, United States, and Spain across engineering, security, finance, and manufacturing roles.

What is Quest One currently working on?

Active projects include PEM electrolyzer product development and innovation, machine networking and IoT connectivity concepts, OT security hardening (SIEM/EDR implementation), ERP process optimization, and IFRS-HGB financial reporting transition. Cross-site coordination and cloud architecture optimization are underway.