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

.

The targeted job scope, daily responsibilities, and operational criteria for this specialized role include:

1. 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.

2. Hiring Requirements & Profile Blueprint Because this role directly impacts structural integrity and pressure containment, the profile requires technical literacy:

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.

1 Jawatan Kosong Electrical Supervisor di Malaysia | Kerja Kosong | November 2026 | Maukerja

Urus Pemberitahuan

Site Supervisor - Mechanical - Electrical Works