Key selling points

- Process lead from concept through construction, commissioning and operation

- Set the technical standards for a water sector team with a proven record

- Equal share of company profits for every permanent employee

Short description

Senior process role with an Adelaide specialist in the design, construction and operation of water and wastewater treatment infrastructure.

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Process performance proven in operation, not on paper. Flow designs, builds and operates water and wastewater treatment plants, so our process lead carries each design from concept through commissioning and into long term operation.

About Flow

Flow Infrastructure is a specialist design and construct firm delivering water and wastewater treatment infrastructure, including water and sewage treatment plants, pump stations, recycled water schemes and industrial wastewater systems. Our sister company, Flow Utilities, operates and maintains the assets we deliver. Our clients include developers, councils, government and industry across South Australia and interstate.

Flow was established in 2026 by a team that has worked together for more than 20 years. Collectively we bring more than 80 years of experience and, in previous roles, our team delivered 37 sewage and industrial treatment plants, with project experience across Australia and New Zealand. Flow is certified to ISO 9001 and ISO 45001 and holds a building work contractors licence specific to sewer and water infrastructure installation.

Current projects include industrial wastewater treatment, private water and sewerage schemes for greenfield communities, and municipal treatment plant upgrades, delivered for developers, industry, councils and government.

The role

This is the senior process role in the firm. You’ll lead process engineering on our water and wastewater projects, working alongside the Director, who has more than 25 years in plant design and operation, and an experienced delivery team.





You’ll be involved from the earliest stage of each project, shaping the process concept and carrying it through detailed design, construction, commissioning and operation, so that every plant meets its licence conditions, water quality targets and design capacity. You’ll be supported by experienced project managers and a General Manager who handle delivery and commercial matters, so your focus remains on the engineering and operation. You will:

- Lead process design from concept through detailed design across activated sludge biological nutrient removal treatment systems, as well as water treatment, tertiary filtration, disinfection, sludge handling and industrial pretreatment.

- Prepare the process basis of design and contribute to performance guarantees and technical risk assessment for tenders.

- Specify equipment performance, assess suppliers technically and hold suppliers and subcontractors to their commitments.

- Lead commissioning, process proving and performance testing, and support troubleshooting across the plants we build and operate.

- Prepare and support regulatory submissions, including SA Health and EPA approvals, recycled water validation and design certification.

- Work with the Director to develop process design standards, calculation tools and design guides for the business.

- Mentor engineers and drafters as the team expands.

- Work closely with our Mechanical Design and Electrical and Automation leads, project managers and the General Manager.

About you

- A degree in chemical, environmental,



civil or process engineering.

- At least 10 years of process engineering experience within the water sector, covering municipal sewage and industrial wastewater treatment, with water treatment experience highly regarded. Experience must be water sector specific; applicants whose process background is in other industries, such as mining, oil and gas or chemical manufacturing, will not be considered.

- A demonstrated record of delivering treatment plants that met their licence and performance targets.

- Hands on commissioning and troubleshooting experience on operating plants.

- Experience with process modelling software such as BioWin, SUMO or GPS-X is desirable.

- Robust communication skills, with the confidence to engage clearly with clients, suppliers, regulators and site teams.

- CPEng or NER registration is desirable.

- Willing to travel interstate and to New Zealand as required.

What we offer

- A competitive salary plus super.

- An equal share of company profits alongside every other permanent employee.

- A meaningful role in defining how the business approaches process design, working alongside the Director.

- Broad technical exposure across municipal and industrial water and wastewater projects, from design through construction and operation, with process, mechanical, electrical and automation design all delivered in house.

- A collaborative, experienced team where you work closely with the business owners and have a direct say in decisions.

- A modern office on Grote Street in the Adelaide CBD.

How to apply

Please make sure your CV and cover letter accurately reflect your own experience and qualifications. Shortlisted candidates will be asked technical questions at interview to test both. Applications that are clearly AI generated or overstate experience will not be progressed.

You must have current Australian working rights.

📌 Principal Engineer, Water & Wastewater (Adelaide)
🏢 Flow Infrastructure
📍 Adelaide