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