Senior / Principal Water Systems Engineer

Lead meaningful projects. Influence decisions. Enjoy flexibility and balance

We’re looking for a Senior or Principal Water Systems Engineer who wants more than just another consulting role.

At OneStone Consulting, you’ll have the opportunity to apply your technical skills and experience while playing a key role in shaping projects, mentoring engineers, and contributing to the growth of a respected specialist consultancy, all within a flexible, supportive working environment.

Whether you already specialise in water systems or are an experienced engineer looking to deepen your expertise in this field, we welcome conversations with candidates who bring strong fundamentals and leadership capability.

About OneStone Consulting OneStone Consulting is a leading water systems consultancy with a collaborative and practical approach to solving complex water challenges across Western Australia.

We specialise in water system analysis, design and optimisation; taking a whole-of-system view that considers both technical performance and operational outcomes.

Since 2010, our reputation has been built on technical excellence, long-term client relationships, and repeat business across the mining, agricultural, and utilities sectors.

The Opportunity We are experiencing strong growth and are expanding our team to support increasing demand across WA industries.

Work directly with the Managing Director

Influence project direction and client outcomes

Contribute to building a high-performing engineering team

Develop toward or operate at Principal level

Work on complex and impactful infrastructure projects

The Role Reporting to the Managing Director, you will:

Deliver high-quality technical advice to clients

Undertake hydraulic modelling and system investigations

Lead projects and manage delivery to scope, budget and schedule

Mentor and support junior engineers

Build strong relationships with clients and stakeholders

Contribute to continuous improvement and innovation

Skills & Experience We are interested in engineers with:

Bachelor’s or Master’s degree in Civil, Environmental, Mechanical, Process or related discipline

Approximately 7+ years of relevant experience

Experience in water supply, wastewater, mine dewatering or similar infrastructure systems

Hydraulic modelling experience using tools such as WANDA, WaterCAD/HAMMER, InfoWorks WS or similar

Strong analytical and communication skills

Highly regarded:

Pressure transient / water hammer analysis

Mining or agricultural sector experience

If you have transferable experience but don’t meet every criterion, we still encourage you to apply.

What’s on Offer

Flexible working arrangements

Adjusted working hours allowing for

one rostered day off every 4 weeks (OneStone Friday RDO)

High level of autonomy and trust in your role

Opportunity to grow toward or operate at Principal level

Direct access to leadership and decision-making

Supportive, collaborative team culture

Challenging and technically interesting projects

Professional development and growth opportunities

Competitive salary package

Why Engineers Choose OneStone

Meaningful influence over projects

Supportive leadership

Variety of technically interesting work

Genuine work-life balance and flexibility

Long-term career potential

How to apply If this opportunity sounds like the next step in your career, we’d love to hear from you.

Please apply via the OneStone Consulting careers page with your CV and cover letter.

Direct applications only. We are not engaging recruitment agencies for this role.

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