Find the contact person in your region now

CJC® Sales & Service: Your experts for the highest oil and fluid cleanliness.

We at Karberg & Hennemann serve the German market through a network of regional contacts. Your personal contact person is at your side with his in-depth expert knowledge and will be happy to answer all your questions about our CJC® Oil Care Systems as well as about oil and fluid care.

Head of Sales, Authorized Signatory

Michael M. Cornelius

Michael M. CorneliusHead of Sales, Authorized Signatory

Tel: +49 40 8550479 – 82

Mobil: +49 171 30 97 246

Marine Segment

Andreas Mann

Andreas MannKey Account Manager — Marine

Mobil: +49 151 12 88 38 05

Tom Gartz

Tom GartzTechnical Sales

Mobile: +49 163 85 31 093

Jens Hansen

Jens HansenTechnical Sales

Mobile: +49 160 84 87 550

Energy Segment

Sebastian Klopries

Sebastian KlopriesBusiness Development — Energy

Mobile: +49 151 65 07 27 83

Baden-Württemberg

Eckhard Weller

Eckhard WellerTechnical Sales

Mobile: +49 175 22 61 609

Karem Bauer

Karem BauerService Technician

Mobile: +49 170 55 71 695

Bavaria

Bernd Warnecke

Bernd WarneckeTechnical Sales

Mobil: +49 163 85 31 094

Michael Müller

Michael MüllerArea Sales Manager Southern Germany

Mobile: +49 163 85 03 096

Karem Bauer

Karem BauerService Technician

Mobile: +49 170 55 71 695

Berlin

Matthias Knorr

Matthias KnorrRepresentation CJC®

Mobile: +49 160 921 77 778

Brandenburg

Matthias Knorr

Matthias KnorrRepresentation CJC®

Mobile: +49 160 921 77 778

Bremen

Michael M. Cornelius

Michael M. CorneliusHead of Sales, Authorized Signatory

Tel: +49 40 8550479 – 82

Mobil: +49 171 30 97 246

Jannik Mertz

Jannik MertzService and Application Technician

Phone: +49 40 8550479 – 28

Mobile: +49 171 69 12 831

Hamburg

Michael M. Cornelius

Michael M. CorneliusHead of Sales, Authorized Signatory

Tel: +49 40 8550479 – 82

Mobil: +49 171 30 97 246

Jannik Mertz

Jannik MertzService and Application Technician

Phone: +49 40 8550479 – 28

Mobile: +49 171 69 12 831

Hesse

Michael M. Cornelius

Michael M. CorneliusHead of Sales, Authorized Signatory

Tel: +49 40 8550479 – 82

Mobil: +49 171 30 97 246

Jannik Mertz

Jannik MertzService and Application Technician

Phone: +49 40 8550479 – 28

Mobile: +49 171 69 12 831

Mecklenburg-Western Pomerania

Tom Gartz

Tom GartzTechnical Sales

Mobile: +49 163 85 31 093

Jannik Mertz

Jannik MertzService and Application Technician

Phone: +49 40 8550479 – 28

Mobile: +49 171 69 12 831

Lower Saxony

Michael M. Cornelius

Michael M. CorneliusHead of Sales, Authorized Signatory

Tel: +49 40 8550479 – 82

Mobil: +49 171 30 97 246

Jannik Mertz

Jannik MertzService and Application Technician

Phone: +49 40 8550479 – 28

Mobile: +49 171 69 12 831

North Rhine-Westphalia

Jens Wojtusch

Jens WojtuschTechnical Sales,
Machinery Lubricant Analyst (MLA II),
Expert for Cooling Lubricants (TÜV)

Mobil: +49 151 52 53 57 70

Christoph Hasebrink

Christoph HasebrinkService Technician

Mobile: +49 151 12 88 38 02

Christina Schwartz

Christina SchwartzSales assistance

Phone: +49 40 8550479 – 37

Rhineland-Palatinate

Michael M. Cornelius

Michael M. CorneliusHead of Sales, Authorized Signatory

Tel: +49 40 8550479 – 82

Mobil: +49 171 30 97 246

Christoph Hasebrink

Christoph HasebrinkService Technician

Mobile: +49 151 12 88 38 02

Saarland

Eckhard Weller

Eckhard WellerTechnical Sales

Mobile: +49 175 22 61 609

Karem Bauer

Karem BauerService Technician

Mobile: +49 170 55 71 695

Saxony

Matthias Knorr

Matthias KnorrRepresentation CJC®

Mobile: +49 160 921 77 778

Saxony-Anhalt

Matthias Knorr

Matthias KnorrRepresentation CJC®

Mobile: +49 160 921 77 778

Schleswig-Holstein

Tom Gartz

Tom GartzTechnical Sales

Mobile: +49 163 85 31 093

Jannik Mertz

Jannik MertzService and Application Technician

Phone: +49 40 8550479 – 28

Mobile: +49 171 69 12 831

Thuringia

Matthias Knorr

Matthias KnorrRepresentation CJC®

Mobile: +49 160 921 77 778

Are you looking for a CJC® contact person in your country?

Our sales representatives and branches look after you worldwide.

Find the contact person in your country here

Fairs & Events

Meet us in person and get to know us and the successful concept of efficient fluid and oil care.

Meet us at the SMM 2026 trade fair in Hamburg

Meet us at the AMB 2026 exhibition in Stuttgart

Meet us at the WindEnergy 2026 trade fair in Hamburg

All trade fairs & events – Secure vouchers for tickets now