At J de Jonge, we take pride in our rich heritage as a family-owned business with over 70 years of experience in engineering,  construction and manufacturing mechanical infrastructure in the energy sector.

Founder Jan de Jonge Sr. was one of the first electric welders in the Netherlands, so our company has deep roots in the industry. J de Jonge began as a specialized mechanical & piping company and have grown into a trusted partner for the traditional and new energy sector, providing sustainable end-to-end solutions that encompass engineering, prefab, construction, 24/7 service, repair and original equipment manufacturing.

We’ve set ourselves apart with our family values, believing in building long-term relationships with all our stakeholders. This is evident in our partnerships with industry leaders like Shell and Vopak, who have relied on us since the beginning of the company. Our clients appreciate our 24/7 service, dedication to quality, safety and a strong sense of accountability. We not only focus on completing projects on time and to the highest standards; we also aim to be a valued partner who delivers on promise.

Our culture is rooted in the idea of hard work and smart solutions. We emphasise efficiency by embracing the latest technologies and automating simple tasks, allowing our teams to focus on innovation and problem-solving. This unique blend of dedication and ingenuity has made J de Jonge a leader in our field, with a global team of 650+ skilled professionals ready to tackle any challenge worldwide.