Estimator

OVERSEAS TECHNICAL ENGINEERING AND CONSTRUCTION PTE. LTD.Singaporemycareersfuturepublished 10/12/2026

Job Summary

We are looking for an experienced Estimator to handle tender preparation and cost estimation for both Project Works and Turnaround (TA) / Shutdown / Plant Maintenance Works in the Oil & Gas, Petrochemical, and Industrial sectors.

The successful candidate must be able to independently evaluate tender requirements, perform quantity take-offs, estimate manpower and equipment requirements, and prepare accurate and competitive tender proposals.

Key Job Responsibilities

  • Review tender enquiries, scope of work, engineering drawings, specifications, and contractual requirements to identify project requirements and potential risks.
  • Prepare detailed cost estimates and tender proposals for both mechanical project works and TA / shutdown / maintenance works .
  • Perform material quantity take-offs (MTO), manpower estimation, equipment costing, and subcontractor cost evaluation.
  • Estimate costs for mechanical works, including piping fabrication and installation, storage tank repair, structural steel works, equipment installation, maintenance, and associated activities.
  • Develop manpower and resource estimates for TA / shutdown works, taking into consideration productivity rates, work sequences, shift arrangements, overtime, and tight execution schedules.
  • Attend site visits, tender briefings, and clarification meetings to assess site conditions, accessibility, construction methodologies, and execution constraints.
  • Source, obtain, and evaluate quotations from suppliers and subcontractors to ensure technical compliance and cost competitiveness.
  • Prepare comprehensive tender cost breakdowns, including labour, materials, equipment, subcontractors, consumables, logistics, preliminaries, overheads, and contingencies.
  • Identify scope gaps, technical uncertainties, commercial risks, and potential variation items, and prepare the necessary tender clarifications, qualifications, and exclusions.
  • Coordinate with project managers, site personnel, engineering teams, and subcontractors to develop practical execution methodologies and realistic cost estimates.
  • Prepare preliminary work schedules, manpower deployment plans, and equipment requirements to support tender pricing.
  • Assist in post-tender clarifications, commercial negotiations, variation order quotations, and cost evaluations.
  • Maintain and update tender cost databases, unit rates, manpower productivity records, and historical project costs to improve estimation accuracy.
  • Ensure all tender submissions are completed accurately and within the required deadlines.

Job Requirements

  • Degree in Mechanical Engineering, Electrical Civil Engineering, Quantity Surveying, or a related discipline.
  • Minimum 5–10 years of relevant experience in tendering and cost estimation within the Oil & Gas, Petrochemical, or Industrial Plant Maintenance industry.
  • Experience in both Project and TA / Shutdown / Maintenance tendering is required.
  • Good knowledge of mechanical works, piping, storage tanks, structural steel, and industrial maintenance activities.
  • Ability to read and interpret engineering drawings, P&IDs, isometric drawings, and technical specifications.
  • Strong understanding of manpower productivity, construction methodologies, and equipment requirements.
  • Proficient in Microsoft Excel, Microsoft Power Point, Microsoft Project and other Microsoft applications.
  • Good analytical, communication, and coordination skills.
  • Able to work independently, manage multiple tenders, and meet tight deadlines.
  • Willing to attend site visits and be posted to site when required.