Principal Engineer - Treatment Design

Thrive in a dynamic role as you shape WA’s water future. We are looking for people who are inspired to find better solutions, so together we can shape WA’s water future. At Water Corporation, we pride ourselves on being more than just a workplace. Our community is made up of committed and energetic individuals who prioritise a healthy work-life balance and embrace a diverse and vibrant culture.

About the role

We have a number of permanent Principal opportunities joining our engineering treatment design team. You’ll undertake, manage and support the efficient design and delivery of ‘fit for purpose’ water and water resource recovery treatment infrastructure, and also support the development of policy and standards for the delivery of water and water resource recovery assets. These roles are based in our Leederville office, and reporting to the Team Leader, Treatment Design.

What the role will involve

• Plan and manage the development and delivery of complex designs and reports for the solution to engineering problems using in-house or external resources
• Manage the preparation of complex tender documents, undertake tender analysis and make recommendations
• Provide advice to and liaise with internal customers, external suppliers, service agencies, consultants, industry regulators and agencies in relation to water and water resource recovery infrastructure
• Represent Water Corporation in consultation and negotiations with government agencies, local authorities, consultants, developers and community groups
• Maintain focus on continuous review and improvement of the design process, incorporation of best practice and innovative technology into designs, and feed into lessons learnt process
• Undertake and coordinate complex investigations, conceptual planning and financial analysis for assessment, development and remedial works of water and water resource recovery infrastructure assets

Real benefits that matter

• Real flexibility with options to work from home, 9-day fortnight, flexible work hours
• Two well-being days each year to do whatever you need to do to feel good
• Access to long service leave pro rata after 3 years of service
• Take advantage of our co-contribution superannuation scheme: Receive a 12% employer contribution and enjoy an additional 2% employer co-contribution when you elect to salary sacrifice 2%
• Purchase additional leave of up to 12 weeks or work 4 years at a reduced salary and take the fifth year off as paid leave

Discover more benefits we offer to support the unique and individual ways our employees live.

About you

• Degree level qualification in an appropriate engineering discipline
• Advanced knowledge of design, commissioning and construction of water and water resource recovery infrastructure   
• Experience in the preparation and review of complex technical reports and tender specifications for water and water resource recovery infrastructure
• Knowledge of engineering principles and practices relating to water and water resource recovery
• Advanced ability to analyse existing and / or proposed infrastructure assets in order to evaluate engineering and economic effectiveness and to present viable recommendations
• Detailed knowledge of statutory requirements, regulation and national standards associated with design, approval and development of water and water resource recovery related infrastructure assets  

Sound like a match? Apply today

If you are interested in the above opportunity, please submit a covering letter and resume that best demonstrates your skills and experience as well as your ability to meet the requirements of the role. 

As part of the recruitment process you may be required to complete pre-employment screening which may include a medical, qualification check, police clearance and Australian working rights check.  

Applications close Sunday 18^th January 2026

Our commitment to a diverse and inclusive workplace

Diversity and inclusion are more than words. They guide us on building a thriving workforce that reflects the diversity of our customers and our community.

We encourage applications from every background, including Aboriginal and Torres Strait Islander people, people with disability, women, youth, LGBTQIA+ folks and people from culturally and linguistically diverse backgrounds.

We are committed to ensuring an accessible and inclusive work environment to enable people with disability to participate fully in all aspects of employment.

Applicants with disability who require adjustments, or alternative methods of communication in the recruitment process, can contact a Recruitment Officer at recruitment@watercorporation.com.au or 08 9420 2000. To read our diversity and inclusion statement, please visit our website