Estimator

OVERSEAS TECHNICAL ENGINEERING AND CONSTRUCTION PTE. LTD.; Singapore; On-site; SGD 60,000 - 100,000; Full time

Job summary

OVERSEAS TECHNICAL ENGINEERING AND CONSTRUCTION PTE. LTD. seeks an experienced Estimator to manage tender preparation and cost estimation for project works and TA/shutdown/maintenance in oil & gas, petrochemical, and industrial sectors.

The role requires independent evaluation of tender requirements, quantity take-offs, manpower and equipment estimation, and compelling tender proposals. You will source quotations, assess risks, develop comprehensive cost breakdowns, and coordinate with project

Qualifications

• Diploma in Mechanical Engineering, Electrical Civil Engineering, Quantity Surveying, or related discipline.
• 3–5 years of tendering and cost estimation experience in Oil & Gas, Petrochemical or Industrial Plant Maintenance.
• Experience in both Project and TA/Shutdown/Maintenance tendering is required.
• Proficient with MS Office tools and project estimation workstreams.

Responsibilities

• Review tender enquiries, scope, drawings, specs and contracts to identify requirements and risks.
• Prepare detailed cost estimates and tender proposals for mechanical projects and TA/shutdown works.
• Perform material take-offs, manpower estimation, equipment costing, and subcontractor evaluations.
• Develop cost breakdowns including labour, materials, equipment, and contingencies.
• Coordinate with project teams, site personnel and subcontractors to ensure realistic estimates.
• Attend site visits and clarification meetings to assess conditions and execution methods.
• Prepare VO considerations, clarifications, and exclusions for tender submissions.
• Maintain tender cost databases and historical project costs to improve accuracy.

Skills

Analytical skills

Communication

Coordination

Reading drawings

Education

Diploma in Mechanical Engineering

Diploma in Electrical Engineering

Diploma in Civil Engineering

Diploma/Certificate in Quantity Surveying

Tools

Excel

PowerPoint

MS Project

Job description

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

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

Job Requirements

• Diploma in Mechanical Engineering, Electrical Civil Engineering, Quantity Surveying, or a related discipline.
• Minimum 3–5 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.