Site Engineer (Water Treatment)

W3 Associates Pty; Sydney; On-site; AUD 90,000 - 130,000; Full time

Job summary

W3 Associates Pty in Sydney seeks a Site Engineer (Water Treatment) to support delivery, commissioning and operation of industrial water and wastewater projects across Australia.

Based in Sydney, this role suits a Chemical or Mechanical Engineer with hands-on site experience who can coordinate across design, construction and operation.

The position covers large-scale D&C and BOO facilities as well as mobile treatment systems, with travel to project sites across Australia.

Qualifications

• Degree qualified in Chemical Engineering or Mechanical Engineering.
• 2–6+ years' experience in water or wastewater treatment.
• Willingness to travel regularly to project sites across Australia.

Responsibilities

• Support the delivery of industrial water and wastewater treatment projects, including D&C and BOO.
• Coordinate site engineering activities, installation, commissioning and operational support.
• Assist with project execution, including scheduling, cost estimation, procurement and progress tracking.
• Coordinate subcontractors, suppliers and site personnel to ensure safe and efficient project delivery.
• Ensure compliance with WHS, environmental and quality management requirements.
• Prepare technical documentation, operating procedures, commissioning reports and project close-out documentation.
• Support treatment plant performance optimisation, troubleshooting and ongoing operational improvements.
• Work closely with internal engineering, technical and project delivery teams to support successful project outcomes.

Skills

Site-based work

Project coordination

Troubleshooting

Education

Bachelor's degree in Chemical Engineering or Mechanical Engineering

Job description

Our client is an ASX-listed Australian water technology company experiencing significant growth across the industrial water and wastewater treatment sectors.

Specialising in industrial water treatment, wastewater management and PFAS remediation, the business delivers innovative, engineered treatment solutions to major clients across the data centre, mining, infrastructure, defence and industrial sectors.

With a rapidly expanding project portfolio and strong investment in technology and innovation, the company offers an exciting opportunity to join a growing business at the forefront of advanced water treatment solutions.

Position Summary

We are seeking a Site Engineer (Water Treatment) to support the delivery, commissioning and operation of industrial water and wastewater treatment projects across Australia.

Based in Sydney, this role is ideally suited to a Chemical or Mechanical Engineer with strong technical and practical experience who enjoys working across both office and site environments.

The position offers exposure to a diverse portfolio of projects, ranging from large-scale Design & Construct (D&C) and Build, Own, Operate (BOO) treatment facilities through to smaller-scale, temporary and mobile water treatment systems.

Working across the data centre, mining, infrastructure and industrial sectors, the successful candidate will support projects throughout their lifecycle, from engineering and construction through to commissioning, operations and ongoing performance optimisation.

Key Responsibilities

• Support the delivery of industrial water and wastewater treatment projects, including D&C, BOO and temporary treatment solutions.
• Coordinate site engineering activities, installation, construction, commissioning and operational support.
• Assist with project execution, including scheduling, cost estimation, procurement and progress tracking.
• Coordinate subcontractors, suppliers and site personnel to ensure safe and efficient project delivery.
• Ensure compliance with WHS, environmental and quality management requirements.
• Prepare technical documentation, operating procedures, commissioning reports and project close-out documentation.
• Support treatment plant performance optimisation, troubleshooting and ongoing operational improvements.
• Work closely with internal engineering, technical and project delivery teams to support successful project outcomes.

Required Experience

• Degree qualified in Chemical Engineering, Mechanical Engineering or a related discipline.
• 2–6+ years' experience in water or wastewater treatment, site engineering, commissioning or project delivery.
• Experience working on industrial, mining, infrastructure or water treatment projects would be advantageous.
• Hands‑on, site‑focused approach with the ability to work autonomously and coordinate site activities.
• Willingness and flexibility to travel regularly to project sites across Australia.