J. de Jonge: Next gen connectors 

Starting as a piping- and construction company in 1954, J. de Jonge is now a leading mechanical engineering contractor providing a comprehensive range of products and services to clients in the petrochemical- and energy transition industry.

With offices in the Netherlands, Belgium, Germany, America, and Saudi Arabia we are proud in being an international family business. We possess specialized subsidiaries and a team of 650 FTEs that can assist you in optimizing your operations. 

Our subsidiaries 


Mechanical: Piping- and construction. CAPEX, OPEX, and maintenance projects.JMEC: Engineering company 


HES Heat Exchanger Services, JRS brand independent Rotating Service, JLS brand independent Loading Arm Service, and JLA Loading Technology.


TankX: Tank construction and maintenance.

Our mission and vision


We are next gen connectors: Driving innovation, sustainability, and performance.

Our current focus is gradually shifting toward the energy transition market, where we have already completed several significant projects. We work according to the highest quality and safety standards. 


‘’Creating the next gen industry.’’

We aim to establish an industry propelled by sustainable energy, characterized by technology-driven and autonomous operations, free from work accidents, and empowering individuals in their pursuits.


At the forefront of the energy transition, we are the trusted partner, facilitating the transport and storage of sustainable energy forms. Empowered by our dedicated employees and cutting-edge technology, we strive to forge every conceivable connection.