Senior Commissioning Supervisor – Onshore Process Plant Expansion
Kwinana, WA | $115–$140 p/hr inc super | 12-month contract | Monday–Friday (10-hour days)

We are seeking an experienced Senior Commissioning Supervisor to lead commissioning activities for a major brownfields process plant expansion in Kwinana. Reporting to the Construction & Commissioning Manager and working closely with the Project Site Manager, this role will oversee commissioning across multiple disciplines — mechanical, process, electrical and instrumentation, piping, and controls — while coordinating civils, SMP, E&I, and fabrication subcontractors on site.

The position will plan and execute pre-commissioning and commissioning activities within an operational plant environment, ensuring all work is completed safely, efficiently, and to specification.

Key Responsibilities

Lead and coordinate commissioning teams and subcontractors across civils, SMP, E&I, and fabrication scopes.

Plan, prepare, and execute pre-commissioning and commissioning activities, including scope definition, procedures, schedules, resourcing, and documentation.

Drive strong HSE performance and promote safe work practices across all site activities.

Manage commissioning execution, system handovers, completions, and punch list closure.

Liaise with engineering, construction, completions, and operations teams to meet schedule and quality objectives.

Identify and manage risks, interface issues, and resource needs.

Provide hands-on technical support and problem-solving during commissioning and start-up.

Maintain close communication between site and home office teams to ensure alignment on priorities and progress.

Skills and Experience

Trade or tertiary qualification in mechanical, process, or a related discipline.

Minimum 15 years’ commissioning experience within oil and gas or heavy process facilities, including at least 10 years in construction and start-up.

Strong experience in onshore brownfields and operational environments.

In-depth understanding of permit-to-work systems, isolations, and completions processes.

Proven leadership, planning, and coordination skills across multiple subcontractors and disciplines.

Proficient in Microsoft Office and construction management systems.

Trade-qualified candidates will be considered towards the lower end of the pay range.

Additional Details

Location: Kwinana, WA (site-based)

Roster: Monday–Friday, 10-hour days (additional hours may be required during shutdowns)

Contract Duration: 12 months

Start Date: ASAP