Cost Estimator

N-Sea Group; Dordrecht; On-site; EUR 42,000 - 64,000; Full time

Benefits offered by this job

Lunch buffet

Professional growth opportunities

Supportive team environment

Competitive compensation

Job summary

N-Sea Group in Dordrecht seeks a Cost Estimator to join our offshore energy team. You will prepare comprehensive cost estimates and cashflow forecasts for tenders and ongoing projects across oil & gas and renewables, collaborating with technical and commercial colleagues to reflect full project scope.

You will help maintain accuracy and transparency in cost data, contribute to risk assessments, and support management decisions with robust estimates and cost control insights.

Qualifications

• Bachelor's or Master's degree in Engineering or related field.
• 1–5 years of relevant experience in cost estimation, tendering, project controls, or technical projects.
• Affinity with maritime, offshore, or energy industry is an advantage.
• Strong analytical and numerical skills with high attention to detail.
• Proficiency in Microsoft Excel and interest in cost estimation tools and financial data.
• Commercial awareness and understanding of financial implications of technical decisions.
• Proactive, pragmatic, solution-oriented mindset with ability to identify risks/opportunities.
• Strong communication and collaboration across multidisciplinary teams.

Responsibilities

• Participate in tendering processes and align with company ambitions and values.
• Prepare cost estimates based on Scope of Work and WBS.
• Identify project risks and develop risk budgets with mitigations.
• Prepare cash flow analyses for cost reviews and input to cost reviews.
• Own cost calculations and pricing schedules for clients.
• Coordinate input from relevant departments into cost estimates.
• Collaborate with Procurement to manage supplier quotations and proposals.
• Prepare financial/cost reports for internal reviews.
• Collaborate with Project Controllers/Managers post-award for cost control reports.
• Contribute to maintenance of central cost database and estimation methodologies.

Skills

Analytical skills

Numerical skills

Commercial awareness

Communication skills

Independence

Tendering experience

Project controls

Education

Engineering degree

Related field

Tools

Excel

Cost estimation tools

Job description

Are you analytical, commercially minded, and interested in the offshore energy industry? Do you enjoy working with numbers, understanding complex projects, and turning technical information into reliable cost estimates?

At N-Sea, we're looking for a Cost Estimator to join our team in Dordrecht. In this role, you will contribute to exciting international subsea projects, work closely with technical and commercial teams, and have the opportunity to develop your expertise in a dynamic and growing organisation.

As a Cost Estimator at N-Sea, you play a key role in preparing comprehensive cost estimates and cashflow forecasts for tenders and ongoing projects. You will support the commercial and project teams by developing detailed and reliable estimates that reflect the full scope of offshore subsea projects across the oil & gas and renewable energy sectors.

Your role is vital in ensuring financial accuracy, transparency, and competitiveness — from initial tendering to project execution. You provide detailed cost variations, risk assessments, and cashflow analysis to support management decisions, while also contributing to the continuous improvement of our cost estimation methodologies.

This position offers an excellent opportunity to combine analytical precision with commercial insight, directly contributing to N-Sea’s ability to deliver safe, efficient, and cost-effective subsea solutions worldwide.

Key Responsibilities:

• Participate in N-Sea's tendering processes, working in line with our ambitions and values;
• Prepare cost estimates based on the Scope of Work and Work Breakdown Structure;
• Identify and quantify project risks, develop corresponding risk budgets, and advise on appropriate mitigation measures;
• Prepare cash flow analyses for cost reviews and provide input during internal cost review sessions;
• Take responsibility for cost calculations and pricing schedules submitted to clients;
• Coordinate all required input from relevant departments into the cost estimates;
• Collaborate with the Procurement Department to manage supplier and subcontractor quotations, analyse proposals, and support selection based on best value and compliance with project requirements;
• Prepare financial and cost reports as required for internal cost and sales reviews;
• Upon contract award, collaborate with Project Controllers and Project Managers to establish cost control reports based on approved cost estimates;
• Contribute to the development and maintenance of N-Sea's central cost database and overall cost estimation methodology.

Requirements:

• Bachelor's or Master's degree in Engineering, Technical Business Administration, Finance, or a related field;
• 1–5 years of relevant professional experience, preferably in cost estimation, tendering, project controls, or a technical project environment;
• Affinity with the maritime, offshore, or energy industry is a strong advantage;
• Strong analytical and numerical skills, with excellent attention to detail;
• Proficiency in Microsoft Excel and an interest in working with cost estimation tools and financial data;
• Commercial awareness and the ability to understand the financial implications of technical and operational decisions;
• Proactive, pragmatic, and solution-oriented mindset, with the ability to identify risks and opportunities;
• Strong communication skills and the ability to collaborate effectively with multidisciplinary teams;
• Ability to work independently, manage priorities, and meet deadlines in a dynamic project environment;
• Eager to learn, develop professionally, and contribute to improving cost estimation processes and methodologies.

What We Offer:

• Competitive salary and benefits package.
• Complimentary daily lunch buffet at our Dordrecht office, offering a wide variety of options.
• A great team of passionate and professional colleagues.
• A supportive and inclusive work environment.
• Opportunities for professional growth and development.
• The chance to be part of a company that values innovation, sustainability, and teamwork.

About N-Sea

N-Sea is an end-to-end subsea services provider. With a fleet of 14 multipurpose vessels and a range of in-house systems and equipment, N-Sea delivers smart, fit-for-purpose solutions for subsea infrastructure projects in every stage of the offshore asset life cycle for customers in the international offshore energy industry. Our bespoke solutions focus on specific subsea capabilities, such as survey, UXO ID & clearance, cable repair & installation, or IRM, construction & decommissioning.

With the support of an experienced, multidiscipline offshore operations team, we integrate these bespoke capabilities into a single project, delivering a smart, fit-for-purpose, safe and sustainable solution that improves the efficiency of subsea projects and reduces projects risks for our customers.

N-Sea Group is a privately owned company headquartered in the Netherlands, with more than 500 people working offshore and onshore, onboard vessels and in facilities across Europe and the Middle East, and a revenue of more than €200M in 2025.

N-Sea. Smart Subsea Solutions.

Do you want to be part of our team?