GELSENWASSER AG Tech Stack

Municipal water, energy, and wastewater infrastructure operator across Germany

Utilities Gelsenkirchen, Nordrhein-Westfalen 1,001–5,000 employees Founded 1887 Public Company

GELSENWASSER AG operates water, energy, and wastewater systems for German municipalities and industrial customers. The tech stack reveals a hybrid legacy-to-cloud posture: core infrastructure runs on Windows Server, SQL Server, and SAP (including SAP IS-U for utilities billing), while the engineering team is actively building on Azure with Terraform and modern CI/CD pipelines. Active adoption of Azure Landing Zones and projects around platform modernization and automated deployments suggest a deliberate shift toward infrastructure-as-code and standardization—critical for a public-sector utility managing thousands of networked assets.

Tech Stack 22 technologies

Core StackWindows Server SQL Server Python C# Terraform Power Platform SAP SAP SuccessFactors PowerShell VBA LIMS LC-MS GC-MS SCADA Siemens S7 Microsoft Office Azure Microsoft Fabric SAP IS-U Excel

AdoptingAzure Landing Zones

What GELSENWASSER AG Is Building

◆Challenges

Optimizing it infrastructure for energy trading
Automated platform development
Standardizing deployments
Prioritizing rehabilitation needs
Expanding site operations
Staff coordination in network operations
Timely transmission of load curve data
Providing data for internal processes
Expanding investment portfolio
M&a due diligence

▲Active Projects

Azure platform development
Netzberechnung weiterentwicklung
Datenmodell änderungsdienst
Operating and maintaining the wastewater treatment plant
Azure landing zones modernization
Ci/cd pipeline design
Building power operation at geseke
Construction and operations oversight
M&a due diligence projects
Investment portfolio development

Hiring Activity

Steady40 roles · 15 in 30d

Department

Engineering

Ops

Finance

Construction

Data

Sales

Support

Seniority

Intern

Senior

Mid

Junior

Director

Lead

Manager

Notable leadership hires: Automation Lead

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About GELSENWASSER AG

Founded in 1887, GELSENWASSER AG is a public utility company headquartered in Gelsenkirchen, North Rhine-Westphalia, with approximately 1,500 employees. The company provides end-to-end infrastructure management across three core services: drinking water supply, energy distribution, and wastewater treatment. Customers include municipalities, industrial operators, and commercial clients across Germany. Revenue streams span network operations, asset maintenance, energy trading optimization, and M&A activity in regional utility consolidation. The hiring profile—dominated by engineering and operations roles, with a notable number of intern and early-career placements—reflects ongoing workforce renewal in a capital-intensive, aging-infrastructure sector.

HeadquartersGelsenkirchen, Nordrhein-Westfalen

Company Size1,001–5,000 employees

Founded1887

Hiring MarketsGermany

Frequently Asked Questions

What is GELSENWASSER AG's tech stack?

Core infrastructure: Windows Server, SQL Server, SAP (including SAP IS-U for utility billing), SCADA, and Siemens S7 PLCs. Cloud platform: Azure, Terraform, Power Platform, and Microsoft Fabric. Data/lab: Python, C#, LC-MS, GC-MS for water quality analysis. Active modernization toward Azure Landing Zones and CI/CD automation.

What is GELSENWASSER AG working on?

Core projects include Azure platform development, Azure Landing Zones modernization, CI/CD pipeline design, automated platform development, and infrastructure standardization. Operational focus areas: wastewater treatment plant management, network load-curve data transmission, and M&A due diligence tied to utility consolidation activity.