Site Supervisor - Mechanical & Electrical Works

LAP ENGINEERING (SINGAPORE) PTE. LTD.; Singapore; On-site; SGD 70,000 - 105,000; Full time

Job summary

LAP ENGINEERING (SINGAPORE) PTE. LTD.

is seeking a Site Supervisor for Mechanical & Welding Works to oversee on-site fabrication, structural erection, high‑pressure piping installation, and welding quality control, with emphasis on metallurgy, structural integrity, NDT, and welding procedure compliance. The role covers welding execution, QC, mechanical installation, piping fabrication, material control, and safety/hot work management, requiring strict adherence to WPS, welder qualifications,

Qualifications

• Education: Diploma or technical certification in Mechanical, Metallurgy, or Welding Engineering.
• Certifications: AWS-CWI or CSWIP credentials are advantageous.
• Experience: 2–4 years of direct site experience in relevant sectors.

Responsibilities

• Welding Execution & QC: enforce WPS, verify welders' qualifications, inspect joint fit-ups, coordinate NDT tests and log defects.
• Mechanical Installation & Piping: supervise lifting, rigging, piping fabrication, spool fit-ups, flange work and torque checks.
• Material & Consumable Control: manage storage, baking and tracking of welding consumables and materials.
• Safety & Hot Work Management: enforce hot work permits, ventilation, fire watch, and safe welding practices.

Education

Diploma or Technical Certification in Mechanical, Metallurgy, or Welding Engineering

Job description

Job Summary

A Site Supervisor for Mechanical & Welding Works is responsible for overseeing the physical fabrication, structural erection, high-pressure piping installation, and welding quality control on-site. While a general mechanical supervisor handles broad systems like HVAC and plumbing, this specific role focuses heavily on metallurgy, structural steel integrity, non-destructive testing (NDT), and welding procedure compliance.

Core Job Scope & Technical Responsibilities

Welding Execution & Quality Control (QC)

• Enforce compliance with strict Welding Procedure Specifications (WPS) and ensure all field welding aligns with approved drawings.
• Verify welder qualifications , ensuring every welder on the floor holds valid, up-to-date certifications (WPQR) for the specific materials and positions required.
• Oversee weld preparation , inspecting joint fit-ups, bevel angles, root gaps, and alignment before welding begins.
• Coordinate Non-Destructive Testing (NDT) , scheduling Radiographic (RT), Ultrasonic (UT), Magnetic Particle (MT), and Dye Penetrant (PT) tests, and managing the weld repair log for any defects.

Mechanical Installation & Piping Fabrication

• Supervise heavy lifting and rigging operations for structural steel components, pressure vessels, and heavy machinery alignments.
• Direct piping fabrication , including spool fit-ups, flange management, gasket installations, and torque verification.
• Manage hydrotesting and pneumatic testing , preparing test loops, witnessing pressure holds, and securing official test pack sign offs.

Material & Consumable Control

• Control welding consumables , ensuring proper storage, baking, and holding of low-hydrogen electrodes and filler wires in heated ovens.
• Trace material heat numbers , ensuring full accountability and documentation for all structural plates, pipes, and fittings used. (where applicable)

Safety & Hot Work Management

• Enforce strict Hot Work Permits , ensuring fire blankets, gas detectors, and dedicated fire watch personnel are active at every welding station.
• Manage workspace hazards , covering ventilation in confined spaces, scaffolding safety for high-altitude welding, and flash protection for surrounding workers.

Hiring Requirements & Profile Blueprint

Attribute: Requirements & Specifications

• Education: Diploma or Technical Certification in Mechanical, Metallurgy, or Welding Engineering .
• Certifications: Strong advantage if holding - AWS-CWI (Certified Welding Inspector) or CSWIP 3.0 / CSWIP 3.1 credentials.
• Experience: 2 to 4 years of direct site experience in oil & gas, petrochemical, process plants, marine/shipyard, or heavy structural steel projects.
• Technical Knowledge: Deep familiarity with international codes (e.g., ASME B31.3 / Section IX, AWS D1.1, API 1104 ).
• Blueprint Skills: Advanced ability to interpret P&IDs, isometric drawings, structural blueprints , and welding symbols.