Senior or Principal Environmental/Waters Engineer

BTW Company; Hamilton; On-site; NZD 120,000 - 180,000; Part time

Job summary

BTW Company is seeking an experienced Environmental / Waters engineer for our Hamilton team in a Senior or Principal capacity. The role focuses on technical leadership across stormwater, three-waters, and civil projects, with flexibility in hours to match experience and availability.

You will work with local government, energy, and private development along with planners, surveyors, ecologists and iwi, applying water sensitive design and Te Mana o te Wai.

Qualifications

• Engineering degree (or equivalent) with 10+ years of relevant experience.
• CPEng or working towards CPEng.
• Strong stormwater and three-waters technical capability.
• 5+ years’ experience in the New Zealand regulatory environment.
• Confident in engaging with clients and stakeholders.
• Collaborative and inclusive working style.

Responsibilities

• Provide technical leadership and delivery across stormwater and three-waters projects, with potential design leadership, peer review, mentoring and client engagement.
• Lead stormwater and three-waters projects from investigation through design and delivery support.
• Design/model stormwater quality, quantity and conveyance solutions.
• Apply water sensitive design and Te Mana o te Wai in project outcomes.
• Share knowledge through mentoring, peer review and technical support.

Skills

Stormwater engineering

Three-waters

Environmental engineering

Client engagement

Mentoring

Education

Engineering degree

Job description

This role is offered part‑time but we are open to full‑time hours if those better suit you now or in the future.

We’re seeking an experienced Environmental / Waters engineer to join our Hamilton team. This is a hands‑on Senior or Principal role, providing technical leadership and delivery primarily across stormwater, alongside three‑waters and civil projects. The scope and hours of the role can be tailored to match your experience, interests and availability.

You’ll work across local government, energy, and private development infrastructure projects, applying water sensitive design and Te Mana o te Wai, and collaborating with planners, surveyors, ecologists and iwi.

About the role

You’ll provide technical leadership and delivery across a range of projects, supporting practical and sustainable outcomes for public and private sector clients. Depending on your background and preferences, the role may include design leadership, peer review, mentoring, and client engagement.

Your work may include

• Leading stormwater and three‑waters projects from investigation through to design and delivery support
• Designing/Modelling stormwater quality, quantity and conveyance solutions that are practical and buildable
• Applying water sensitive design and Te Mana o te Wai in project outcomes
• Working collaboratively within multidisciplinary teams and alongside iwi and stakeholders
• Sharing knowledge through mentoring, peer review and technical support

This is a hands‑on Senior or Principal role, focused on technical leadership, judgement and collaboration rather than people‑management.

About you

You’re an experienced environmental, stormwater, and/or three‑waters engineer who enjoys solving complex problems and supporting others. We’re interested in your experience, approach and how this role could work for you.

We are hoping you’ll bring

• A degree in Engineering (or equivalent) with 10+ years’ relevant experience
• CPEng (or working towards)
• Strong stormwater and three‑waters technical capability
• 5+ years’ experience in the New Zealand regulatory environment
• Confidence engaging with clients and stakeholders
• A collaborative and inclusive working style

Why join BTW?

• Since 1973, BTW has delivered creative, sustainable solutions across engineering, surveying, planning, and environmental science.
• With 90+ professionals in New Plymouth, Hamilton, Taupō, Taumarunui, and Raglan, we offer stability, career growth, and a commitment to innovation.
• Enjoy employee-led training, collaboration with a multidisciplinary team, and flexible workday options to support your work-life balance.

Ready to make an impact? Have you checked out our BTW Company video (see link above) and love our values and the things we do?

We are not an Accredited Employer under the AEWV scheme and are unable to support work
visa applications. Applicants must already have the right to work in New Zealand.