? Principal Hydrologist

Are you looking for a role where you can work on impactful surface water projects across sectors like resources, renewables, agriculture, urban development, and infrastructure?

At Eco Logical Australia (ELA), a Tetra Tech company, we lead with science and the purpose of making a difference. As one of Australia’s leading environmental consultancies, we’re proud to offer a workplace where your passion for the workplace can thrive.

With us, you’ll find your people - supportive, down-to-earth experts who are leaders in their fields and genuinely love what they do. You’ll be empowered to grow your knowledge and contribute to meaningful work. Our projects are dynamic, our culture is collaborative, and no two days are the same.

We offer full-time, part-time and flexible work arrangements, so our people can live their best lives while doing their best work.

?️ What You'll Be Doing

Our National Water Team is searching for a Principal Hydrologist to join the team based in our Melbourne office.

You will be joining the company in a key leadership position to support project delivery for existing clients and also grow, lead, and mentor a team with the support of the wider technical discipline and company.

What sets ELA’s Water Team apart from our peers is our focus on collaborating nationally with other water services (hydrogeologists, geochemists, aquatic ecologists) and wider environmental services (approvals, ecology, cultural heritage, bushfire) to provide our employees with interstate opportunities and encourage diverse perspectives.

As a key leader in strategic growth and mentorship for the office and wider business, you will be undertaking the following:

- Client management and business development
- Project Management and Project Directorship of hydrological, hydraulic, water engineering, and water resource studies.




- Undertake hydrological work across the whole life cycle of a project - from desktop literature reviews, coordinating and undertaking field studies, to collecting and analysing the data, and finally writing or reviewing the technical report.
- Support the Surface Water Team with development and running complex hydrology and hydraulic models from flood modelling (RORB and TUFLOW) to water balance modelling (GoldSim).
- Deliver water resource management studies for clients who depend on these resources or clients who wish to manage and mitigate potential effects to water resources.

? Why You’ll Love Working with Us

You’ll love working with us because we will value your expertise, encourage your curiosity and your contributions will have a real-world impact. You'll be part of a team that genuinely enjoys what they do and supports each other to succeed. We offer:

- A competitive salary subject to annual review.
- Workplace flexibility.
- Paid birthday leave.
- Health & Wellbeing programs.
- Study assistance scheme and learning opportunities with industry experts.
- One professional association membership per year (e.g. Engineers Australia), as well as applicable professional registration fees (e.g. RPEQ).
- Collaborate on projects across the country, building your expertise within a supportive community of practice.
- Professional development opportunities.
- Genderless 12-week paid parental leave.
- Salary packaging options including car leasing, salary sacrifice into superannuation and the ability to purchase 4 weeks of additional annual leave.
- Opportunity to participate in Tetra Tech employee stock purchase program, and purchase at a discounted rate (NASDAQ TTEK).

? Apply now

- Learn more about the prospect here
- To apply, please forward your application (including a cover letter addressing the above criteria) to our People and Culture team, via email [email protected]
- Applications close: Monday, 2 November 2026

Come and see if our people are your people.

📌 Hydrologist (Melbourne)
🏢 Eco Logical Australia
📍 Melbourne