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Heerema Marine Contractors

Assistant Mate (m/w/d)

Start your nautical career as an Assistant Mate with Heerema Marine Contractors in Leiden, Netherlands. You'll be responsible for watch keeping, navigating, and contributing to safety activities aboard one of the world's largest crane vessels. Enjoy strong compensation, offshore allowances, and a 5 weeks on/off rotation schedule.
Heerema Marine Contractors
Heerema Marine Contractors
Leiden, Netherlands   On-site   Full Time   EUR 67k yearly  UTC+01:00

Heerema Marine Contractors

Company Overview

Heerema Marine Contractors

Leiden, Netherlands

1948

Business Model

Marine Engineering and Construction

Offshore construction, installation, and decommissioning of oil and gas platforms, as well as renewable energy projects.

Contracting services, project management, and engineering solutions.

Locations & Geography

Heerema Marine Contractors operates in multiple countries, including the Netherlands, the United Kingdom, Norway, Brazil, and the United States.

Company Culture

Their mission is to deliver safe and sustainable solutions for the offshore energy industry, emphasizing safety, integrity, and innovation.

They promote a collaborative and inclusive work environment, focusing on teamwork and respect.

Heerema invests in employee training and development programs to enhance skills and career growth.

Activities & Projects

Recent notable projects include the installation of the Hornsea One offshore wind farm and the decommissioning of the Brent Delta platform.

They are actively involved in developing innovative solutions for sustainable offshore energy, including advancements in floating wind technology.

Heerema is committed to reducing their carbon footprint and enhancing sustainability in their operations.

Career Opportunities

Typical job openings at Heerema include positions in engineering, project management, and marine operations.

They offer competitive salaries, health benefits, and opportunities for professional development.

Contact Information


Last updated on 2025-03-25 | Report an issue

Job Description

Imagine starting your nautical career on one of the world's largest crane vessels!

At Heerema Marine Contractors, we do something new every day. We operate the world's largest crane vessels and with them we transport, install and remove offshore structures for the offshore energy markets. Our projects range from installing wind turbines, removing retired offshore oil and gas platforms and installing platforms up to 50,000 metric tons. By joining us, you will play an important part in our unique maritime adventure.

Your role in the story

As an Assistant Mate you start aboard one of our crane vessels and will be eventually responsible for watch keeping and navigating in accordance with "Captain's orders" and international laws and regulations. You will learn how to operate the DP system and contribute to safety activities. Furthermore you will make yourself familiar with procedures regarding the projects, heavy lifting and ISM. And also will track and update sea charts, check instruments, keep the logbook, monitor weather forecast and take timely action when necessary. As a last you are aware of the positioning of the ship, perform tasks when the ship is anchored, maintain radio contact and keep an eye on all occurring movements.

Key ingredients for success

You have recently obtained your Bachelor degree at the Higher Maritime School, hold a license to work as an Assistant Mate and are preferably DPO certified or willing to certify. Excellent reporting skills, a practical mind and flexible attitude. The ability to communicate in a strong and clear manner, both in Dutch and English, is essential.

Your future colleagues

In this position you will work closely with our experienced and professional Mates, Assistant Chief Mate, Chief Mate and Captain who will guide you in your development.

Your Foundation for Success

At our core, we champion an entrepreneurial spirit and a relentless pursuit of growth. We seek individuals who excel in personal development, seize opportunities where others see challenges, and turn them into success. Whether you're a creative problem-solver, an ambitious go-getter, or someone who thrives in collaboration, we cultivate a culture of passion, dedication, and continuous improvement. Personal leadership and initiative are non-negotiable: you own your growth and the impact you make. If you tackle challenges with a creative yet practical mindset, drive goals with determination, and add value to diverse teams, you'll thrive with us. Together, we create impact and drive meaningful change, always focused on results.

Here's why people love working with us

  • Strong compensation & benefits, including offshore allowance, bonus structure, and strong pension and insurance packages
  • bonus basis = your annual gross salary + 13th month + 8% holiday allowance;
  • Future-proof pension: gross scheme covering base + 13th month + holiday allowance, with no mandatory contribution up to ???70,719.48.
  • Comfortable cabins, fitness facilities, excellent catering, and onboard recreation
  • A high focus on safety and sustainability
  • 5 weeks on / 5 weeks off rotation schedule (subject to project needs)

Is this your dream job? Put in your application now!

The application process consists of two interviews, an online assessment, and an employment offer.

  • The first interview will be conducted via Microsoft Teams with the Captain and Recruiter, giving you the opportunity to learn more about the nautical aspects of the role and life on board our vessels.
  • The second interview will take place at our office in Leiden, where you'll meet additional team members and get a better feel for our culture and working environment.

As part of the process, you will also complete an online assessment, which will take place either before or immediately after the first interview. We are excited to learn more about your ambitions, personality, and motivation. Include a short cover letter telling us why you're the perfect fit, and make the impossible possible with Heerema!

Are you ready to make the impossible possible offshore?

At Heerema Marine Contractors, we deliver the world's most challenging offshore projects in the energy sector. From designing and engineering to transporting, installing, and removing offshore structures, we make the impossible possible - safely and sustainably.

Our success is built on the expertise and dedication of our diverse team, working together across offshore, onshore, and office-based roles. We value teamwork, innovation, and a can-do mindset, and we are proud of our culture where colleagues support and inspire each other to achieve excellence.

Join Heerema and become part of a world-class team shaping the future of the offshore industry.

Highlights

At Heerema Marine Contractors, we offer offshore jobs, engineering careers, and office opportunities worldwide. Join our team and make the impossible possible.

Job Location: HMC Leiden

Base Salary: 67,476.00 EUR

Business area: Offshore Marine Crew

Standard Weekly Hours: 84.00

Job Level: Entry/Junior

Req Id: 665

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About the role

December 15, 2025

Full Time

Company

December 15, 2025

On-site

EUR 67k yearly

Heerema Marine Contractors

heerema.com

  •  Leiden, Netherlands

Entry/Junior

UTC+01:00

Apply now

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