SAE is, above all, SAE’s employees.

From all departments, at all levels. They are responsible for our success. With their professional competence, their human qualities, and their will to work as a team.

A community of experienced specialists who place joint success above that of the individual – and focus on the interests of our customers.


Ronald Vrancken

Managing Director

Ronald Vrancken is a graduate of EDHEC Business School (European MBA) and holds a Master in Mechanical Engineering. He joined LACROIX on September 1, 2019. Previously, he was country CEO of Siemens Luxembourg. During his career, he has held several key positions in the Siemens Group in the automotive, transformation industry and water sectors.

Dipl.-Ing. Oliver Callegari

Managing Director Sales

Oliver Callegari is a graduate engineer (FH) in supply engineering from the Cologne University of Applied Sciences. He has been working for SAE since 1996. Initially in technical sales and since 2011 as Managing Director Sales. He supports key accounts from the utilities industry in strategic planning and has been a key speaker and moderator at the SAE Expert Days for more than 15 years. As a board member, he manages the integration into the international network of the parent company LACROIX.

Daniel Wittmaack

Business Unit Director

As a graduate mechanical engineer, Daniel Wittmaack obtained his diploma and a Master of Engineering from the Rheinische Fachhochschule in Cologne. Prior to his career at SAE IT Systems/Lacroix Environment, he held various management positions at the Bühler Group in the areas of International Sales, Product Management and Market Segment Development as well as Process Engineering. As Business Unit Manager of SAE IT Systems, he is responsible for Marketing, Operations and R&D.

Kirsten Rüffer

Assistant to the CEO


Johann Kloucek

International Business Development

Dipl.-Ing. Jörg Schroeder

Regional Sales Manager / Northern Germany

Dipl.-Ing. Stephan Kerkhoff

Regional Sales Manager / Western Germany

David Guder

Regional Sales Manager / South-western Germany

Eugenio Cavaliere

Regional Sales Manager / South Germany

Dipl.-Ing. David Puhlmann

Regional Sales Manager / Eastern Germany

Dipl.-Ing. Julian Stochmel

International Sales Director

Timor Lalee

Technical Sales / Inside Sales

Stephanie Sikora

Sales Assistant

Alexandra Stratmann

Sales Assistant

Kerstin Kerlen

Sales Assistant

Repairing & Service

Information Security & Quality

Markus Dewerny

Information Security & Quality Management Officer

Marketing & Product Management

Dipl.-Kfm. (FH) Matthias Schuster

Director Marketing

MBA Thilo Kauffmann

Teamlead Marketing Communications


Anna Jurisch

Human Resources Director