Senior Hydraulics Modeller

Mott MacDonald Group; Auckland; On-site; NZD 120,000 - 170,000; Full time

Benefits offered by this job

Flexible working arrangements

Discretionary bonuses

Professional development

Life and income protection insurance

Annual leave purchase option

Employee ownership culture

Job summary

Mott MacDonald in Auckland is seeking a Senior Hydraulic Modeller to lead hydraulic modelling and network planning for water and wastewater systems. The role collaborates with engineers, planners and digital specialists on national projects, delivering data-driven solutions and strategic infrastructure insights.

You will refine models using InfoWorks, MIKE, EPANET, ArcGIS and QGIS, mentor junior staff, and communicate findings clearly to clients and stakeholders.

Qualifications

• Minimum 5 years in water/wastewater network planning and hydraulic modelling.
• Strong analytical thinking and problem-solving mindset.
• Excellent communication and collaborative approach.
• Passion for delivering high-quality, impactful work for communities.

Responsibilities

• Lead and contribute to hydraulic modelling and network planning across water and/or wastewater.
• Develop and refine models to support master planning and infrastructure development.
• Apply InfoWorks WS Pro, EPANET, InfoWorks ICM, DHI MIKE+, ArcGIS, and QGIS.
• Collaborate with multidisciplinary teams across Auckland, Wellington, and nationally.
• Communicate insights clearly to clients and stakeholders; mentor junior staff.

Skills

Analytical thinking

Communication skills

Collaborative approach

Education

Engineering, Science, Geography or related field

Tools

InfoWorks WS Pro

EPANET

InfoWorks ICM

DHI MIKE+

ArcGIS

QGIS

Job description

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Senior Hydraulic Modeller – Water and / or Wastewater

Auckland | Help shape the future of water infrastructure in Aotearoa

Create lasting impact with purpose.

At Mott MacDonald, we’re more than a global consultancy—we’re a community of passionate professionals committed to delivering sustainable, people-focused solutions. Our work is grounded in integrity, collaboration, and care for the communities we serve.

We’re proud of our legacy in Aotearoa New Zealand, where our locally based teams have contributed to some of the country’s most strategic and meaningful infrastructure projects. Now, we’re looking for a Senior Hydraulic Modeller to join our growing Water team in Auckland.

Why this role matters

Water is life—and how we manage it shapes the wellbeing of our people, our environment, and our future. As a Senior Hydraulic Modeller, you’ll play a key role in delivering innovative, data-driven solutions that support resilient, sustainable water systems across New Zealand.

You’ll work alongside a tight-knit, supportive team of engineers, planners, and digital specialists, contributing to projects that span the country and beyond. Your work will directly influence how communities grow, adapt, and thrive.

What you’ll do

• Lead and contribute to hydraulic modelling and network planning projects across water and / or wastewater systems
• Develop and refine models to support strategic master planning and infrastructure development
• Apply your expertise in software platforms such as InfoWorks WS Pro, EPANET, InfoWorks ICM, DHI MIKE+, ArcGIS, and QGIS
• Collaborate with multidisciplinary teams across Auckland, Wellington, and nationally
• Communicate insights and solutions clearly to clients and stakeholders
• Mentor junior team members and contribute to a culture of learning and excellence

What you’ll bring

• A degree in Engineering, Science, Geography, or a related field
• Proven experience (minimum 5 years) in water / wastewater network planning and hydraulic modelling
• Strong analytical thinking and a problem-solving mindset
• Excellent communication skills and a collaborative approach
• A passion for delivering high-quality, impactful work that benefits communities

Why Mott MacDonald?

We believe in empowering our people to thrive—professionally and personally. When you join us, you’ll be part of a diverse, inclusive team that values your voice and supports your growth.

We offer

• A competitive salary and enhanced KiwiSaver contributions
• Flexible working arrangements that support wellbeing and balance
• Discretionary Group and Personal Performance Bonuses for eligible employees
• Ongoing professional development and global career pathways
• A culture that celebrates achievements and promotes teamwork
• Opportunities to work on projects that make a real difference

Join us in shaping a better future

Together, let’s build a more resilient, inclusive, and sustainable Aotearoa.

Employee ownership

• Our employee ownership model means no external investors, just us, creating a culture of shared success.
• Our employees have a stake and a voice in our business, giving them a direct connection to our success through our personal and group performance bonuses.
• As your career grows, so does your stake, recognising your long‑term impact and contribution.
• Your voice matters, with the opportunity to connect directly with senior leadership through formal channels to help shape our future.

Our benefits package is designed to enhance your experience

• A flexible and agile work atmosphere that caters to your professional journey and life's special moments
• A competitive salary complemented by Discretionary Group and Personal Performance Bonuses for eligible employees
• Comprehensive coverage including life, personal accident, and salary continuance insurance, providing peace of mind during uncertain times
• Opportunities to enhance your work-life balance through the option to purchase extra annual leave
• Employee resource groups including the Inclusive Network for Women, Corporate Social Responsibility and more

You've got this!

We endorse a diverse and inclusive workplace and look to provide suitable opportunities for employees including the opportunity for part time and job shared roles where possible.