Mammoet COO Jan Kleijn to Leave After 30 Years
30-Second Takeaway
Mammoet COO Jan Kleijn will leave the company on 1 February 2027, concluding a 30-year career with the heavy lifting and transport specialist. He spent the last 15 years in senior leadership roles, serving as CEO before becoming chief operating officer in 2017. Mammoet credited Kleijn with developing talent, strengthening working cultures and preparing the business for its next generation of leadership. CEO Joost Goderie said the company will continue building on the foundation Kleijn helped establish across its global operations.
Mammoet COO Jan Kleijn
Jan Kleijn will step down from Mammoet on 1 February 2027 after three decades with the company. His career developed from operations and logistics into executive leadership, including service as both chief executive officer and chief operating officer.
Mammoet described his progression as
“a remarkable example of what is possible” within the organisation, highlighting both his operational experience and his contribution to developing people.
From Operations to Executive Leadership
Kleijn spent the last 15 years in leadership positions at Mammoet. After serving as CEO, he moved into the COO role in 2017. That progression placed him at the centre of a business delivering engineered heavy lifting and transport services for complex projects around the world.
His departure marks the conclusion of a career spanning field operations, logistics and company leadership, with Mammoet’s announcement placing particular emphasis on the teams and working cultures he helped develop.
Commitment to People and Talent Development
Mammoet highlighted Kleijn’s investment in employees as a defining feature of his leadership.
The company said:
“What has always stood out is Jan’s commitment to people. He has consistently invested in developing talent, strengthening working cultures, and creating opportunities for others to grow.”
The company presented his departure as a handover of responsibility to the next generation of leadership, recognising the importance of developing people alongside operational capability.
Passing Responsibility to the Next Generation
Mammoet CEO Joost Goderie linked Kleijn’s decision to his longstanding emphasis on the company’s future.
Goderie said:
“Jan has always believed that executive decisions must be made with the long term in mind, a principle central to Mammoet’s success. True to that belief, he is confident the time is right to pass the baton to the next generation of leadership, and that Mammoet is well-positioned for what lies ahead. Every day, our people deliver extraordinary solutions that support critical energy, infrastructure, industrial and offshore projects around the world. As we continue to serve our customers and expand into new industries, we do so on the strong foundation that leaders like Jan have helped to build.”
About Mammoet
Mammoet is a global specialist in engineered heavy lifting and transport, supporting the movement, installation and removal of large structures and industrial equipment. Its work spans energy, infrastructure, industrial and offshore projects.
The company traces its origins to a Dutch maritime business established in 1807. Through subsequent mergers and expansion, it developed capabilities that combine transport with lifting and installation, including its factory-to-foundation approach to moving large components from production locations to project sites. Mammoet merged with engineered heavy lifting company ALE in 2020, further expanding its international capabilities.
Mammoet reports a workforce of approximately 7,000 professionals worldwide. Its operations combine engineering expertise, specialist equipment and project execution teams to handle heavy lifting and transport requirements across different industries.
Official website: www.mammoet.com
Frequently Asked Questions
When will Jan Kleijn leave Mammoet?
Kleijn will leave the company on 1 February 2027.
How long has he worked at Mammoet?
His career with Mammoet spans 30 years.
Which leadership positions has he held?
Kleijn served as CEO before becoming chief operating officer in 2017.
What did Mammoet highlight about his contribution?
The company recognised his commitment to developing talent, strengthening working cultures and creating opportunities for employees.
What industries does Mammoet serve?
Mammoet supports heavy lifting and transport projects across energy, infrastructure, industrial and offshore markets.
