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Colliers (NASDAQ, TSX: CIGI) is a global diversified professional services and investment management company operating through three industry-leading businesses: Commercial Real Estate, Engineering, and Investment Management.With greater than a 30-year track record of consistent growth and robust recurring cash flows, we scale complementary, high-value businesses that provide essential services across the full asset lifecycle. Our unique partnership philosophy empowers exceptional leaders, preserves our entrepreneurial culture, and ensures meaningful inside ownership — driving strong alignment and sustained value creation for our shareholders. With $5.7 billion in annual revenues, 24,000 professionals, and $109 billion in assets under management, Colliers is committed to accelerating the success of our clients, investors, and people worldwide.

Colliers Engineering & Design partners with clients across industrial, data centres, infrastructure, commercial, residential, health, education, defence, energy and resources, transport, and public sector projects, delivering integrated solutions.

Job Description

We are seeking to appoint the key position of Water Resources Engineer in Sydney. You will report directly into our Principal Engineer and have the backing of a team of over 500 experts nationally. You will promote the strategic objectives of the Engineering and Design business, achieving this through the active delivery of projects.

Specifically:

- Assessment of water related impacts – hydrologic, flooding and water quality associated with infrastructure, mining and development projects
- Undertake conceptual engineering design and investigations of civil and stormwater infrastructure including earthworks, drainage, basins dam, etc
- Preparation and review of engineering reports, drawings, specifications, bill of quantities and cost estimates
- Undertake project and client management duties for projects as well as reporting on project milestones

Qualifications

- Tertiary qualifications in Civil or Environmental Engineering
- Demonstrated experience in hydrological/hydraulic analysis (1D, 2D and rain-on-grid), flood risk management, stormwater quality/quantity modelling, stormwater infrastructure design and technical reporting
- Proven experience using computer software including 12D, TUFLOW, XPRAFTS/WBNM, HEC-RAS, QGIS, MUSIC
- Motivate and empower the team to perform through leading by example
- Superior technical knowledge while delivering pragmatic and practical outcomes
- High level industry awareness and engagement

Additional Information

At Colliers, we are enterprising. What sets us apart is not what we do, but how we do it. Our people are passionate, take personal responsibility and always do what's right for our clients, people and communities. We accelerate their success by empowering them to think and act differently to drive exceptional results.

With circa 9,000 experts in Asia Pacific, our enterprising culture and decentralised operating model allows us to act with speed in local markets, seizing opportunities to innovate and accelerate the success of our clients and our people.

Our collaborative culture sets us apart. We help experts become true specialists and provide the long-term structure and platform to accelerate their success.

We fosteran environment in which everyone at Colliers feels respected and comfortable bringing their authentic selves to do their best work. It's our people who set us apart and we actively recruit people who represent the diversity of the communities in which we operate. We take great pride in doing what's right and operating in ways that benefit the business,



our people, our clients, our communities, and the environment.

Experts join experts, and we welcome you to join us as we lead the industry into the future.

Join a company that is passionately committed to the pursuit of a better world through positive change. With more than 70 years of business and technical expertise in mining , energy , and infrastructure ,our 10,000 colleagues in 150 countries tirelessly work toward bettering the industries in which we operate. With practical solutions that are safe, innovative and sustainable, we think globally while acting locally.

Our Project Delivery Group (PDG) is a dynamic team of professionals passionately committed to world-class project delivery across the globe.With expertise in sustainable studies, asset building and operations, and industry-leading efficiencies, our best-in‑class team leverages methodologies, governance and systems that are unparalleled in the engineering space. Are you looking for an opportunity to join a diverse group of professionals who are committed to remaining exceptional? We look forward to hearing from you.

We are currently seeking a highly motivated Water Resources Engineer to join our Sydney-based Civil/Hydrotechnical team. This is an exciting opportunity to work across a diverse range of mining, energy and infrastructure projects, applying your technical expertise to deliver innovative and sustainable water resources solutions while continuing to grow your career in a collaborative and supportive environment.

What You'll Do

- Undertake hydrological and hydraulic modelling and assessments
- Deliver flood modelling and flood impact assessments
- Prepare and review technical reports and engineering documentation
- Develop and review project proposals and study deliverables
- Provide input into engineering design, project planning and cost estimates
- Mentor and support junior engineers and graduates
- Collaborate with multidisciplinary teams across a variety of projects
- Build strong client relationships and contribute to successful project outcomes

About You
Bachelor’s degree in Civil or Environmental Engineering. You are a collaborative and solutions-focused engineer with experience delivering water resources projects across mining, energy, infrastructure, or consulting environments. With a strong foundation in hydrology and hydraulics, you enjoy solving complex challenges, building trusted client relationships, and working as part of multidisciplinary teams to deliver practical, sustainable outcomes.

You will also bring:

- Experience undertaking hydrological, hydraulic, and flood modelling studies
- Strong technical writing, analysis, and communication skills
- Proficiency with industry-standard tools such as QGIS, RORB, XP-RAFTS, URBS, TUFLOW, MUSIC, and HEC-RAS (1D and 2D)
- The ability to balance multiple priorities and contribute across a diverse project portfolio
- A willingness to coach, mentor, and support the development of junior engineers
- A collaborative mindset and commitment to fostering an inclusive team culture

Experience in water balance modelling, stormwater management, Water Sensitive Urban Design (WSUD), sediment transport assessments, water supply systems, or flood forecasting and warning systems will be highly regarded. RPEQ and/or CPEng accreditation is preferred. Above all, you are passionate about delivering innovative water resources solutions that create lasting value for clients, communities, and the environment.

- Collaborate on exciting projects to develop innovative solutions

Don't meet every single requirement? You don't need to. At Hatch, we are building a diverse,



inclusive workplace that fosters innovation. If you're interested in this role, we encourage you to apply even if your past experiences don't perfectly align with the skills we've listed.

Working with an energetic and high performing team, you may be involved in:

- Hydraulic, hydrologic and water balance models using tools such as TUFLOW and GoldSim.
- Delivering flood studies, floodplain risk management studies, flood impact assessments and development impact assessments.
- Conducting hydrologic and hydraulic assessments in accordance with Australian Rainfall and Runoff (ARR) methodologies.
- Supporting mine water management studies, operational water assessments and strategic water planning projects.
- Analysing complex catchments, water systems and flood behaviours to support informed decision making.
- Collaborating with multidisciplinary teams across water resources, civil engineering, environmental services, mining, dams, tailings and planning.
- Managing projects, maintaining strong client relationships and engaging with key stakeholders to deliver successful outcomes.
- Contributing to proposals, business development activities and the continued growth of our water resources capability.
- Conducting technical reviews and mentoring emerging professionals across the team.

What you will bring to the team:

- Degree qualifications in Civil Engineering, Environmental Engineering, Water Resources Engineering or a related discipline.
- Approximately 5 to 15 years of relevant consulting, industry or client-side experience.
- Experience in one or more of the following areas:
- Flood modelling
- Hydrology
- Hydraulic engineering
- Surface water engineering
- Mine water management
- Water balance modelling
- Water resources planning and assessment

- Strong technical capability in one or more of the following:

- TUFLOW
- GoldSim

- Experience delivering complex water resources projects across infrastructure, mining, energy, water, defence or urban development sectors.
- Strong communication, stakeholder engagement and client relationship skills.
- Project management experience and a commitment to delivering high-quality outcomes.
- A collaborative mindset and a passion for mentoring and knowledge sharing.

We respectfully ask that no agency resumes be presented at this stage.

Senior Water Resources Engineers - Seeking Expressions of Interest

The importance of water to the health of our world can't be overstated.

As the frequency and intensity of floods, droughts and storms increases, the water industry must continue to build resiliency and lead from the front.

Together with our clients, we are thinking and doing things differently to help pre-empt and prepare for what's next. Be a part of this dynamic and committed team of diverse water specialists and drive change for your community.

You’ll be able to apply our powerful global network of skills and decades of experience to create positive water outcomes that respect nature and nurture communities.

Who are we looking for?

Whether your expertise lies in flood modelling, hydrology, hydraulic engineering, surface water, catchments, mine water management or water balance modelling, we'd love to hear from you.

We're particularly interested in professionals with strong experience in TUFLOW and/or GoldSim, who are looking to contribute to major infrastructure, mining, water infrastructure, defence, urban development, dams, tailings, environmental and digital disciplines.

You’ll contribute to meaningful work within a supportive culture that values technical excellence, career growth and flexible opportunities across our connected network.

Positions can be based at any GHD office in Australia, and we’re open to discussing preferences for full time and part time.

Working with an energetic and high performing team, you may be involved in:

- Hydraulic, hydrologic and water balance models using tools such as TUFLOW and GoldSim.
- Delivering flood studies, floodplain risk management studies, flood impact assessments and development impact assessments.

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📌 Senior Flooding & Hydrology Lead | Flexible Hybrid (Sydney)
🏢 Systra
📍 Sydney