Senior Water Security Modeller

About Seqwater

Water is essential for life. At Seqwater, we're not just delivering water—we're driving innovation, growth and transformation to secure the future of water across South East Queensland.

As one of the largest water businesses with the most geographically spread and diverse asset base of any capital city in Australia, our operations extend from the New South Wales border to the base of the Toowoomba ranges and north to Gympie.

As we enter an exciting period of expansion, we're embracing new technologies and sustainable practices to meet the growing needs of our region. We work collaboratively across our organisation and with our stakeholders, constantly striving to enhance the quality of service we provide. As we modernise our systems and invest in smarter water grids, we remain focused on delivering the highest standard of service, always with the future in mind.

Our transformation is about more than just infrastructure—it's about people. Our team of dedicated professionals are united by a shared passion for creating lasting, meaningful outcomes for the communities we serve, and this is reflected in Our Vision, Water for Life, Our Promise - Safe for Life, and Our Values of integrity, respect, care, and courage that shape everything we do.

You'll be working on some of the most high-profile water infrastructure projects in the industry, helping to secure Water for Life for generations to come.

About Your Opportunity

As the Senior Water Security Modeller, you will lead comprehensive modelling assessments to ensure water security across Southeast Queensland. Collaborating with internal and external technical subject matter experts, you will analyse modelling outcomes related to regulated Level of Service objectives, yield assessments, and water storage capacities to support long-term water planning. Your role will involve maintaining water supply models that are accurate, reliable, and fit for purpose, while addressing the region's specific water security needs. You will also seek opportunities to improve and coordinate new model development with government stakeholders, implementing innovative solutions and methodologies to enhance the effectiveness and efficiency of water security assessments.

Key responsibilities:

• Use advanced modelling tools, techniques and methodologies to analyse outcomes, improve model development, and implement innovative solutions that enhance the effectiveness and efficiency of water security assessments.
• Interpret and evaluate water supply modelling outcomes to provide expert advice for Seqwater's Water Security Program, business case development, and stakeholder initiatives.
• Coordinate and manage significant water supply modelling projects within multi-functional teams, developing least-cost optimisation strategies to ensure appropriate water quality and quantity.
• Provide professional advice on government policy, legislation, and regulation, using modelling outcomes to formulate strategies and recommendations for long-term SEQ water supply planning.
• Ensure water supply models are accurate, reliable, and fit for purpose by managing a modelling assurance framework, overseeing change management, and leading internal and external audits.

About you

To be successful in this role, you will possess:

• Tertiary qualification in Science, Maths or Engineering discipline.
• Minimum of 10 years of professional modelling experience, including extensive data analysis and interpretation of modelling results.
• Proven expertise in stochastic modelling for large and complex systems.
• Demonstrated ability to lead multi-functional project teams and translate water security impacts into business case development.
• Strong stakeholder engagement and communication skills, with experience preparing technical reports and advising internal and external stakeholders.
• High-level analytical and statistical interpretation skills, with proficiency in statistical packages and water supply models.
• Ideally, experience in hydrological modelling using tools such as IQQM, WATHNET (RSM), GoldSim or eWater Source to undertake Level-of-Service water security assessments.

This role will be offered on a 24-month fixed term contract basis, with a competitive salary, plus 12.75% superannuation.

Appointment to this role is subject to the provision of a national police check and may be subject to other medical/character requirements. Please note that people with criminal records are not automatically deemed ineligible. Each application will be considered on its merits.

For a more detailed preview of the work that you will be involved in for this role, feel free to take a look at the position description on our careers page -    We also invite you to connect with us on LinkedIn and join our growing community of followers to see all the latest news and job opportunities as and when they happen -

If you are looking for an extraordinary career in which you can make a real impact, we'd love to hear from you

To apply

Submit your cover letter outlining how you meet the requirements of the role and your resume via the Apply button.

Applications close: 11:55PM AEST, Sunday 9th November 2025

For further information please email enquiries to

Please note – applications cannot be accepted via email.