Senior Offshore Project Cost Estimator

Seatrium Ltd; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

Seatrium Ltd. is seeking a Cost Estimator to support offshore engineering projects, including FPSOs and module upgrades.

You will develop cost estimates, assist in WBS and cost breakdown structures, and ensure accurate forecast cost-to-complete across project teams. The role requires a diploma or degree in marine/mechanical engineering, 1–3 years in cost estimating or quantity surveying in marine/offshore environments, and the ability to work with multidisciplinary teams in Singapore on-site at

Qualifications

• Diploma or bachelor’s degree in marine engineering, Naval Architecture, mechanical engineering, or related discipline.
• 1–3 years of cost estimating, quantity surveying, or project support in marine/offshore environments.
• Familiar with offshore platforms, FPSOs, jackets, etc., and onshore petrochemical plants is a plus.
• Detail-oriented with strong analytical, communication, and organizational skills.
• Good team player who can work independently with minimal supervision.

Responsibilities

• Prepare cost estimates for offshore engineering projects (FPSO, module upgrades, platforms, FSRU/FSU conversions, fabrication works).
• Support development of WBS and cost breakdown structures aligned with project scopes.
• Assist in verifying project scopes before allocating WBS codes to stakeholders.
• Prepare monthly project cost reports for management review.
• Analyze project data and lessons learned to improve forecast cost-to-complete accuracy.
• Understand cost cashflow principles and update monthly cashflow curves.
• Participate in project meetings to ensure clarity on progress and costs.
• Review contractual and commercial sections to identify cost implications and risks.
• Collaborate with Engineering, Construction, Procurement, Subcontractors to prepare variation orders and client claims; track change orders.
• Perform ad hoc assignments as required.

Skills

Cost estimation

Analytical

Communication

Organizational

Education

Diploma in Marine Engineering

Bachelor’s in Marine/Mechanical Engineering

Job description

Seatrium Ltd. is seeking a Cost Estimator to support offshore engineering projects, including FPSOs and module upgrades.

You will develop cost estimates, assist in WBS and cost breakdown structures, and ensure accurate forecast cost-to-complete across project teams. The role requires a diploma or degree in marine/mechanical engineering, 1–3 years in cost estimating or quantity surveying in marine/offshore environments, and the ability to work with multidisciplinary teams in Singapore on-site at