Principal Mechanical Engineer (Water)

What if your next role helped shape the future of water in Australia?

At WSP, we don’t just design infrastructure — we redefine how communities connect with water. Join a global network of experts, contribute to landmark projects, and do the kind of work the world truly needs. Here, curiosity is celebrated, ideas are welcomed, and careers are crafted as uniquely as the people behind them.

Our Water team partners with governments, utilities, developers, and industry to deliver innovative, sustainable, and future-ready water solutions across Australia. From concept to completion, we’re transforming how water infrastructure supports communities, economies, and the environment.

Our NSW Water Business Group is on the lookout for an Associate/Principal Mechanical Engineer to join our Sydney team — placing you at the forefront of Australia’s most transformative water infrastructure programs. From major projects with Sydney Water and Hunter Water to nationally significant projects, you’ll be part of a tight-knit, collaborative team solving complex water and wastewater design challenges that truly impact communities, the environment, and the future.

What You’ll Do

We recognize that everyone has unique strengths, and while we value the right experience, we welcome applications from candidates with proven experience in the water, mining, or industrial sectors at a Professional to Principal level. Depending on your experience, you will ideally:

• Drive the technical quality of water and wastewater infrastructure design projects.
• Drive mechanical and hydraulic design across the full project lifecycle, ensuring high technical standards.
• Produce and review concise, high-quality technical documentation and support proposals and pursuits.
• Understand and manage the design on a range of projects or program work packages.
• Manage design packages across a range of projects and programs.
• Exceed client expectations by contributing to a collaborative, responsive design team.
• Assist in project management and design management of a range of projects.
• Mentor emerging talent and collaborate across local and national teams.

About You

You’re a qualified and experienced mechanical engineer who brings a passion for water infrastructure and a collaborative mindset. Ideally, you’ll have:

• A bachelor’s degree in Mechanical Engineering or equivalent tertiary qualifications.
• Chartered status with Engineers Australia, or you’re actively working toward CPEng.
• Solid experience in an engineering consultancy, or in a design role with a contractor or asset owner — with water industry experience being essential.
• Strong technical capabilities across water infrastructure and treatment systems.
• Hands-on experience in hydraulic design for water utilities and pump stations; familiarity with CFD and pipe stress analysis is a plus.
• Confidence in selecting and specifying equipment for complex systems.
• Proficiency in stress analysis using software tools or analytical techniques.
• Exposure to Plant 3D or Inventor is advantageous.
• Knowledge of CHAIR, HAZOP, and safety-in-design practices.
• The ability to prepare and review technical reports for medium to large projects, consult effectively with clients, and communicate clearly with internal teams and stakeholders.

Why choose WSP?

At WSP, we’re committed to creating a workplace where you feel supported, empowered, and inspired to grow. We offer competitive pay, flexible work options, and career pathways tailored to your goals — including mentoring, leadership development, and secondments. With inclusive culture, purpose-driven projects, and perks like paid parental leave, extra leave purchase, and global mobility, you’ll find more than just a job — you’ll find a place to thrive.

Imagine a better future for you and a better future for us all.

Join our close-knit community of talented individuals who share your passion for making a positive impact. Our global team includes more than 69,000 employees, working together to make a difference in communities both close to home and around the world.

An employee Share Purchase Plan is available to all our permanent employees who wish to become owners and vested partners in WSP’s collective success. To find out more about our commitment to the health and wellbeing of our people, and the programs we’ve designed to help you thrive, go to our Employee Benefits page.

With us, you can. Apply today.