You can count on us

The team

Welcome to the team page! This is where you will find all the important contacts and information you need to get in touch with us quickly and easily.

Whether you have questions about our products or services, want to give feedback or need help - we are at your disposal.

Let our team of competent and dedicated employees be at your service at all times to help you with any concerns you may have.

You can reach us by email, phone or via the contact form on our website. We always strive to respond to you quickly and efficiently so that you always receive the best possible support.


Jennifer Grabowski, managing director

Jennifer Grabowski

Managing Director

After a career in banking, Jennifer Grabowski joined her father's company in 2005 to take over the administration of A1-Hydraulics GmbH. After the death of her father, Jennifer Grabowki became managing director of A1-Hydraulics GmbH in 2018 to continue his life's work.

Technical sales and distribution

Björn Ebbinghaus


Björn Ebbinghaus is both a salesperson and a farmer. Through practical experience in his agricultural business, Björn Ebbinghaus is very knowledgeable regarding the use of hydraulics in the field of agriculture and forestry. He has first-hand knowledge of many problems and can advise our customers on the configuration of hydraulic circuits.

Christian Martin


As an electronics technician for industrial engineering and state-certified technician for automation, Christian Martin is the contact person for system technology and all matters concerning electrical controls and radio.

Sonja Stöwe

Order processing & logistics

Mrs. Stöwe is responsible for the processing of orders and the confirmation of delivery dates. She is in constant contact with our production manager and our suppliers. Furthermore, Mrs. Stöwe takes care of the export and all customs matters.


Alexander Derksen

Head of production

Stocking and production planning are firmly under Mr. Derksen's control. To this end, he is in regular contact with international suppliers and the employees of all departments.

Alexander Hinkel

Production and warehouse

Alexander Hinkel works in hydraulic hose production and the assembly of hydraulic components. He also provides support in shipping processing.

Robin Frankenhausen

Production and warehouse

Robin Frankenhausen is a mechatronics technician who assembles cable harnesses, joysticks and switches. He is also responsible for building and commissioning cabin controls.


Kristina Machleidt


If you have any questions regarding invoices, credit notes or balances, please contact Ms. Machleidt Monday through Friday from 8:00 a.m. - 12:00 noon.

Please send invoices addressed to us exclusively to


A1-Hydraulics GmbH

Rudolf-Diesel-Str. 1
42477 Radevormwald

Phone: +49 2195 929 75-0
Fax: +49 2195 929 75-29

Customer Service

Please feel free to contact our technicians at any time to clarify your questions and find suitable products for your needs. You can reach our customer service by phone Monday through Thursday from 7:30 am to 4:30 pm and on Friday from 7:30 am to 4:00 pm.