Lead Water Engineer (Process)

WorleyParsons; Wellington; On-site; NZD 150,000 - 190,000; Full time

Benefits offered by this job

Competitive remuneration

Flexible working arrangements

Career development opportunities

Job summary

Worley in Wellington, New Zealand is seeking a Lead/Principal Water Engineer (Process) to drive process design for municipal and industrial wastewater projects. You will work within a multidisciplinary team to deliver planning, feasibility, detailed design and construction support.

Ideal candidates have a degree in engineering, progress toward chartership, and strong experience in biological and hydraulic design, with proficiency in process modelling tools. NZ working rights required.

Qualifications

• Degree in an engineering discipline relevant to water and wastewater.
• Chartered status or progress toward chartership in a relevant field.
• Proven experience delivering wastewater treatment planning and design projects.

Responsibilities

• Develop process designs for municipal and industrial wastewater facilities.
• Undertake planning, feasibility assessments and option evaluations.
• Prepare PFDs, P&IDs and treatment plant layouts.
• Perform hydraulic modelling and process calculations for treatment systems.
• Undertake biological and process modelling to support design and optimisation.
• Use specialist modelling software to evaluate treatment solutions.
• Contribute to proposals, reports and client presentations.
• Collaborate with multidisciplinary teams and mentor junior engineers.
• Support business development and tender submissions.

Skills

Process design

Wastewater treatment

Hydraulic modelling

Biological treatment

Team leadership

Education

Bachelor's degree in Chemical/Environmental/Civil/Process Engineering

Chartered status / progression toward chartership

Tools

BioWin

GPS-X

WEST

SUMO

Job description

Job Description - Lead Water Engineer (Process) (WEL001U)

Company : Worley

Primary Location

Job

Process

Schedule

Full-time

Employment Type : Employee

Job Posting

Aug 17, 2026

Unposting Date

Sep 16, 2026

Reporting Manager Title : Technical Director - Water

About the Role

At Worley, we're delivering some of New Zealand's most important water infrastructure projects, helping communities improve water quality, environmental outcomes, and long-term resilience.

We're looking for a Lead/Principal Water Engineer (Process) to join our growing Water team, ideally based in Wellington. This role offers the opportunity to work on a diverse range of municipal and industrial wastewater treatment projects, supporting everything from planning and feasibility studies through to detailed design, project delivery and construction support.

Working alongside a multidisciplinary team of water, civil, mechanical, electrical and environmental specialists, you'll play a key role in developing innovative treatment solutions that address complex water and wastewater challenges.

Who We Are

Worley is a global company of energy, chemicals and resources experts headquartered in Australia. We partner with our customers to deliver projects and create value across the life of their assets. We specialize in consulting, engineering, procurement and construction across the project lifecycle, with services extending through to operations and decommissioning.

Leveraging extensive experience and AI-enabled delivery, we support customers in navigating complexity as they meet today's needs and transition to more sustainable solutions.

Our New Zealand team of approximately 250 professionals is backed by a global network of nearly 50,000 people, all driven by a common purpose of delivering a more sustainable world.

We partner with our customers to deliver projects and create value throughout the lifecycle of their assets. From strategic planning and consulting through to design, construction support, commissioning and operation, we help solve complex challenges across the water sector and beyond.

Our Wellington team is supporting some of New Zealand's most important water infrastructure programmes, helping communities improve water quality, strengthen network resilience and prepare for future growth.

What You'll Do

• Develop process designs for municipal and industrial wastewater treatment facilities.


• Undertake wastewater treatment planning, feasibility assessments and option evaluations.


• Prepare Process Flow Diagrams (PFDs), Process and Instrumentation Diagrams (P&IDs), and treatment plant layouts.


• Perform hydraulic modelling and process calculations for treatment systems.


• Undertake biological and process modelling to support treatment plant design and optimisation.


• Use specialist wastewater treatment and process modelling software to evaluate and develop treatment solutions.


• Contribute to proposals, technical reports, design documentation and client presentations.


• Collaborate with multidisciplinary project teams to deliver high-quality project outcomes.


• Provide technical leadership, mentoring and support to junior engineers and developing professionals.


• Support business development activities, customer engagement and tender submissions.

What You'll Bring

• A degree in Chemical, Process, Environmental, Civil or a related Engineering discipline.


• Chartered status or progress toward chartership in a relevant engineering field.


• Demonstrated experience delivering wastewater treatment planning and design projects.


• Strong understanding of biological treatment processes, hydraulic design principles and wastewater treatment technologies.


• Experience using process and hydraulic modelling software such as BioWin, GPS-X, WEST, SUMO or similar tools.


• The ability to develop complex process flow diagrams and technical design documentation.


• Strong analytical, problem-solving and communication skills.


• A collaborative approach and a passion for delivering sustainable water solutions.


• Experience mentoring, supporting and leading junior engineers.


• An interest in supporting business development activities and contributing to tender submissions.


• A track record leading process design for plant upgrades, planned maintenance projects, renewals and new-build treatment facilities.


• Current New Zealand working rights.

Why You Should Apply

• Opportunity to contribute to the sustainable management of New Zealand's water resources and infrastructure.


• The chance to join our growing Water team and help shape its future direction and growth.


• Career pathways across technical leadership, project leadership and people leadership as the Water business continues to expand.


• The opportunity to work closely with our Water Sector Lead and influence how our Water capability evolves to meet market demand.


• Exposure to the full project lifecycle through Worley's integrated consulting, engineering, procurement and construction capability.


• Work alongside engineers who understand what construction-ready design really means.


• Join a fun, inclusive and globally connected team of professionals.


• Flexible working arrangements that support work-life balance.


• Competitive remuneration and employee benefits.


• 22 weeks paid parental leave for primary carers.


• The option to purchase up to 20 additional leave days each year.


• Access to mentoring, professional development and career growth opportunities.


• A supportive team culture built on respect, safety and collaboration.


• Inclusive leadership committed to supporting diverse career journeys.

Moving Forward Together

We want our people to be energised and empowered to drive sustainable impact. Our focus is on a values-inspired culture that unlocks brilliance through belonging, connection and innovation.

We're building a diverse, inclusive and respectful workplace where everyone feels they belong, can be themselves and is heard.

And we're not just talking about it; we're doing it. We're reskilling our people, leveraging transferable skills and supporting the transition of our workforce to become experts in today's low-carbon infrastructure and technology.

Whatever your ambition, there's a path for you here and no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities and be part of delivering sustainable change.