Managing water and wastewater services successfully

Services for the industry


Common search for better practises


Improving individual management and processes

Our services


Voluntary benchmarking since 1996 has led to an impressive number of change measures and improvements in the industry. Benchmarking is used for performance assessment, for improvement and for informing both committees and the public about performance standards and successes. In the meantime, more than 800 utilities have run projects with aquabench GmbH. Many of them are regularly repeated.
To benchmarking


We know the industry and the practises of successful businesses like the back of our hand on account of our project experience and the mix of engineers, natural scientists and economists in our team. On that basis we communicate successful practices to the industry. In our projects we have learned to listen to our customers' management and employees. We are partners of the managerial staffs and want to build on their knowledge.
To consulting

Who we are

Complete team

Peter Graf

Graduate Engineer

Peter Graf is managing director and has managed our Cologne office since its establishment in 2003. He is an engineering graduate with additional business studies and had financial management functions in... mehr

Axel Schmidt

Graduate Master of Business Administration (FH)

Axel Schmidt is the company's commercial manager and is responsible for accounting, human resources and general administration at aquabench GmbH. Before joining the company he studied Business Economics in... mehr

Sze Yie Chan

M. Sc.


Torsten Franz

Dr. Engineer

Torsten Franz works as a project manager at aquabench. Before that he gained a wide range of experience as a planning engineer and as a research associate at the Technical University of Dresden. Against the... mehr

Vanessa Graf



Kay Möller

Dr Engineer

Kay Möller manages drinking water and wastewater projects for aquabench. Before that, as a research associate at the Institute of Water Resources and Water Supply at the Technical University of Hamburg, he... mehr

Ann-Katrin Raudszus



Pamela Raehmel

Graduate Engineer, Graduate Industrial Engineer

Pamela Raehmel works as a project manager at aquabench in Cologne. After studying in Duisburg-Essen and New Zealand, she assumed research tasks in the area of sanitary environmental engineering and river basin... mehr

Natalie Witting

clerk for marketing communication

As a management assistant, Natalie Witting supports both the company management and the project managers in various projects and is responsible for the implementation of project meetings and events. She is also... mehr

Sven Weidemann

Construction technician

Sven Weidemann supports the project managers of the Hamburg and Cologne branches in the maintenance of data and the writing of reports. He provides first-level support to our customers for the aquabench online... mehr

Marius Wilke

Graduate Engineer

Marius Wilke manages projects for water supply, supporting processes and wastewater services at aquabench. After studying Water Resources Management at the University of Magdeburg-Stendal, Mr Wilke initially... mehr

Eva Wortmann

Graduate Biologist, Industrial Engineer

Eva Wortmann manages different projects as project manager for aquabench GmbH, in particular in wastewater treatment. After graduating from the RWTH Aachen with a degree in Biology in 1998, she acquired further... mehr

Daniel Zipperer

Graduate Engineer (FH), MSc

Daniel Zipperer manages aquabench projects in the drinking water and dams services.  After completing his study of Civil Engineering in Dresden and Nottingham, he worked in an engineering office and completed a... mehr


show all

Unveiling New Insights to Assess Water Losses via the Infrastructure Leakage Index (ILI) at WaterLoss 2024 Conference

Join our colleague Daniel Zipperer as he presents a pioneering study at the international WaterLoss 2024 conference in Donostia-San Sebastián, Spain,... read more

Benchmarking Online

Your access

As a participant in a benchmarking project, you will be forwarded here to the online access for your data input and analysis functions.


Quick-Check Energy

Evaluation of your performance indicators online

Use our online check to estimate your energy efficiency (in German language).

Wastewater treatment plants Water supply services