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Estimation Engineer

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Onsite

Estimation Engineer

Tantawan Construction and Service Co.,Ltd.

Estimation Engineer

19 days ago

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Important information


Contract type:

Permanent

Location:

Rayong, Mueang Rayong District, Rayong, Thailand

Work mode:

Onsite

Published on:

8 October 2026

What they need


About the role

This role involves cost estimation and quantity take-off for construction and fabrication projects. You will study scope of work, drawings, specifications, and RFQ/ITT documents to identify work items requiring price assessment. The position requires extracting quantities, preparing cost estimates, and developing pricing schedules while managing data from suppliers and subcontractors.

Key responsibilities

  • Study Scope of Work, Drawings, Specifications and RFQ/ITT documents to identify work items requiring price assessment
  • Extract quantities and prepare Quantity Take-off/MTO by separating according to drawings, systems, sizes or work types with verifiable reference sources
  • Prepare cost estimates for labour, materials, consumables, tools, equipment, subcontractors, transportation and related expenses
  • Assess Man-hours, Productivity and work duration considering work methods and constraints of Onshore/Offshore work
  • Prepare quotation data from Suppliers and Subcontractors, coordinate with Procurement and compare prices against scope and specifications
  • Prepare Cost Breakdown, Unit Rate Build-up and Pricing Schedule according to company and client formats for Proposal team review
  • Identify missing data, unclear quantities and cost risks, and prepare Assumptions, Exclusions and Clarification requests
  • Revise estimates when drawings, scope or client clarifications change, recording Revisions and verifying completeness of pricing items
  • Support delivery of cost data to project team after contract award and improve price database and Productivity from actual project performance

About you

  • Bachelor's degree in Mechanical Engineering, Civil Engineering, Industrial Engineering or related field
  • Minimum 3 years experience in Cost Estimation or Quantity Take-off for Construction or Fabrication work
  • Able to read Structural, Piping Isometric and General Arrangement drawings, Specifications and BOQ/MTO
  • Able to extract work quantities such as steel structure weight, pipe length, number of welds and Diameter-inch, painting area and related material items
  • Understanding of Fabrication and Installation processes including labour costs, materials, tools, NDT equipment and Testing
  • Proficient in Microsoft Excel for Cost Breakdown preparation and formula verification; able to use drawing reading software such as AutoCAD or PDF Measurement Tools
  • Able to read technical documents and communicate in English via email, with attention to detail and ability to meet deadlines
  • Experience in Oil & Gas, Offshore or Brownfield Modification work will be given special consideration

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