Mammoet helps clients improve construction efficiency and optimize the uptime of plants and installations. For that purpose, we provide solutions for lifting, transporting, installing and decommissioning large and heavy structures.

We believe our business is about time: uptime, turnaround time and time to market. To our customers, time is the currency that matters most. That’s why we strive to bring their deadlines forward. It’s an integrated, daily effort shared by everyone at Mammoet, in every aspect of our services: creative engineering, careful planning and safe delivery.  That’s how we move time for our customers. So time isn’t set in concrete. Or forged in steel. It’s not even all that heavy. And yet, it’s the biggest thing we can move for you.

Corporate profile

Our services are focused on the petrochemical and mining industries, civil engineering, power generation and offshore projects. The logistic challenges in these industries are growing daily. Factors such as remote locations, harsh climates and a strong emphasis on the environment are constantly driving us towards smarter and safer solutions.

Mammoet’s services in Engineered Heavy Lifting and Transport comprise:

  • Heavy lifting services
  • Heavy transport services
  • Plant Turnaround / shutdown Management
  • Site-wide construction services
  • Modular construction
  • Factory-to-Foundation / logistics
  • Rapid response
  • Relocation and decommissioning of installations
  • Trading in new and used equipment worldwide

For over two hundred years, we’ve been known for the unique capability of our state-of-the-art equipment. But it’s the trust of our clients that has brought us where we are today. Their confidence inspires 5,000 Mammoet professionals to give it their all each day and truly make a difference in projects all over the world.

Executive Board of Management

From left to right: Martijn Roelants, Paul van Gelder, Jan Kleijn and Kees Voormolen

Board Members

Paul van Gelder
Chief Executive Officer

Paul van Gelder (1969) started his career in 1988 in the Royal Netherlands Navy. From 2004, he worked in the leadership of several companies active in the Oil & Gas industry, including BP, Nederlandse Gasunie and technical service provider Imtech. In 2016, Paul joined SHV, becoming a member of the board of Eriks. As per September 2017 he joined Mammoet’s Executive Board.

Jan Kleijn
Chief Operating Officer

Jan Kleijn (1968) joined Mammoet in 1997 as Manager Operations and Logistics. In 2000 he was appointed Director of Operations & Engineering for the European region.  In 2001 he played a leading role in the technical team that successfully raised the Russian nuclear submarine The Kursk that had sunk in the Barents Sea after an explosion. From 2006 – 2011 Jan Kleijn was Managing Director of Mammoet USA, after which he became Chief Executive Officer of Mammoet Holding. As per September 2017 Jan has taken up responsibility for Operations as well as Marketing and Sales at Mammoet.

Kees Voormolen
Chief Financial Officer

Kees Voormolen (1962) has 30 years of experience in finance positions, mainly in the Oil & Gas industry. He held positions with KLM Royal Dutch Airlines, Royal Boskalis Westminster, Bluewater Energy (FPSOs) and lastly Doedijns Groep International, a company specialized in hydraulic power, motion and control. As per September 2017 Kees joined Mammoet’s Executive Board.

Martijn Roelants
Chief People Officer

Martijn Roelants (1970) is specialized in Human Resources and Organizational Development, among others as a consultant at Deloitte. In 2008 Martijn joined parent company SHV, responsible for HR Management, Compensation & Benefits and global mobility of staff. As from March 2016 Martijn has joined Mammoet’s Executive Board, responsible for Human Capital, Corporate Communication and ICT.

Philosophy and values

Mammoet serves customers by moving large and heavy objects. Mammoet really excels when it helps its customers move time. By providing smart solutions, Mammoet safely and professionally moves deadlines forward, improves uptime and reduces the cost of ownership. It is the challenge of pushing boundaries, creating new possibilities, and accomplishing the exceptional that moves Mammoet as a team.

A shared drive moves Mammoet. The Mammoet team is made up of a group of dynamic and diverse individuals – individuals from different countries, cultures and backgrounds. We share a strong bond that arises out of shared principles: integrity and loyalty and a shared drive:

Love the work

Working at Mammoet is not just any job. The employees of Mammoet share a deep commitment to their work and a desire to excel by building expertise and dedicating their talents to shared goals. We love the challenges of the industry and the equipment that comes with it. Across all disciplines, ages and cultures, one common theme is that employees all have a sense of belonging to something bigger than ourselves; something that moves us.

Results count

Our employees are willing to take on tremendous challenges. Our mindset is to achieve things that others consider impossible. It is about accepting the challenge and delivering the desired result. Employees go the extra mile – and then the extra inch – in safety performance, in reducing environmental impact, in building teams, in getting a contract and in doing the job, and making a profit; it is the result that always counts. We move for results.

Perform as a team

Customers of Mammoet demand excellent performance, and Mammoet demands the same of its employees. We believe excellent performance can only be achieved through team effort. Everybody is expected to embrace his or her role in the team and contribute to the success of the team. In a team, diversity drives performance; people build on each other’s strengths, and step up to compensate for shortcomings. We move as one.

Take care

People, communities and the environment require care. We all make safety a top priority so that after a day’s work, everybody can return home unharmed. We expect all employees to treat people fairly, with timely and clear feedback, and provide rewards for results. We want to contribute to the communities that we work in. As an industry leader, we actively contribute to sustainability in our own company, with the contribution of all employees, suppliers and customers. We move with care.

Be responsible

Together we make up one big, international company. This position brings the responsibility to set standards and drive development. With each job come specific responsibilities. Every employee has to stand for his or her work, and ensure that it meets legal and industry requirements as well as the standards set by Mammoet. We are jointly responsible for ensuring a sustainable future for our company and all our stakeholders. Our employees speak up when it is in the best interest of the company. Mammoet expects employees to step up and take responsibility. We move.

Mammoet history

For a complete historic timeline visit our Facebook Page.

May 13, 1807

On May 13, 1807, Jan Goedkoop purchased a 140 ton sailing cargo ship, ‘Twee Gebroeders’ (Two Brothers). The first Industrial Revolution (Factory Age) was just a few decades old and the second one, the Transportation Age, was still to come. The Dutch monarchy wasn’t even in existence yet (1813).

Jan Goedkoop was one of many visionary entrepreneurs who would lead companies, out of which the current Mammoet emerged. He foresaw the ever greater need for transportation in a growing and industrializing society. In fact, with ‘Gebroeders Goedkoop’ he set the tone for a company that is always at the forefront of market developments, even defines them. In the decades that followed, a transportation company grew with numerous freight and passenger ships, and salvage services.


In 1966 Van Seumeren Kraanbedrijf was founded, active in crane rental. Frans van Seumeren is the son of the founder and came to work with the company in 1973. The family Van Seumeren would be pivotal in the growth and professionalization of the global market for heavy lifting and transport. They would initiate numerous innovations in equipment and processes, always pushing the boundaries of what technology and imagination can realize.


In 1971 Gebroeders Goedkoop merged with heavy transport & lifting company ‘Van Wezel’ to form ‘Mammoet Transport’. In 1973 Mammoet Transport became part of ‘Koninklijke Nederlandsche Stoomboot Maatschappij (KNSM) in Amsterdam, and changed its name to Mammoet. In 1973 Mammoet Shipping was founded. KNSM was sold to Nedlloyd in 1981.

Van Seumeren aquires Mammoet
Portrait of Jan Goedkoop


With the help of private equity firm NPM and a bank, Van Seumeren acquired Mammoet in 2000. Acknowledging the better resonance of the name ‘Mammoet’ in a global market, the merged company was called Mammoet. The lifting of the Russian submarine ‘Kursk’ in 2001, brought international fame for Mammoet and added to a tremendous growth of the company in the years to come, from several hundred million euros in 2001, to over a billion in 2011. In 2006, SHV Holdings acquired the majority of the shares in Mammoet from its subsidiary NPM and the bank. In 2011, SHV acquired the remainder of the shares.

In the last four decades, Mammoet has evolved into a world market leader in the field of engineered heavy lifting and transport. We have been able to do so thanks to a team of creative engineers, numerous innovations in equipment – be it in cranes, jack-up systems, gantries or trailers - and a professional workforce, renowned for its craftsmanship and adherence to the highest safety standards.

Van Seumeren aquires Mammoet


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