Civil Engineer 3D Stormwater Modelling

Civil Engineer – 3D Stormwater Modelling (Land Development)

We are currently seeking a Civil Engineer with 3 waters experience and specifically stormwater experience for a company building a 3D Stormwater Modelling team for Land Development in Auckland.

Responsibilities

Project delivery & design

• Lead stormwater network modelling for greenfield and brownfield subdivisions, including overland flow path analysis, reticulated network sizing, detention/retention, wetlands, and treatment trains (e.g., raingardens, swales, ponds).


• 3D behaviour stormwater modelling for land development in New Zealand.

• Build and calibrate integrated catchment models (1D pipes + 2D surface) to simulate flooding, surcharge, and climate‑change scenarios; iterate designs to achieve performance targets and level‑of‑service.


• Convert model outputs into constructible design: earthworks, outlets/inlets, culverts, WSUD/SuDS details, erosion/sediment control, operation & maintenance considerations.

Standards, compliance & consenting

• Prepare modelling reports and AEE (Assessment of Environmental Effects) inputs for RMA planning processes; support resource and building consent applications (including responses to Section 92 information requests).


• Align deliverables to relevant local authority standards (e.g., development codes, stormwater guidelines) and national expectations (e.g., climate change allowances, water quality outcomes).


• Contribute to flood hazard assessments, setting floor levels, and defining no‑build or overland flow corridors.

Data, quality & collaboration

• Own modelling data management (inputs, assumptions, boundary conditions, versions), apply QA/QC checklists, and support independent peer reviews.


• Coordinate with civil designers, planners, geotechs, transport, and ecology teams; present findings to clients, councils, and mana whenua.


• Mentor junior engineers in hydrology/hydraulics and good modelling practice.

Client & business

• Engage with clients to scope tasks, define modelling strategy, estimate effort, and manage timelines/budgets.


• Help develop standards, templates, and digital workflows to lift modelling efficiency and consistency across the business.

Key Deliverables

• Model build notes (inputs, hydrology, boundaries, assumptions, versioning).


• Scenario dashboards and flood mapping (depth, hazard, velocity), level‑of‑service checks.


• Stormwater management report for planning and detailed design (incl. pond/wetland sizing, device performance, overland flow layouts).


• Consenting documentation and responses to technical queries/S92.


• QA/QC records and peer‑review close‑out.


• IFC‑ready inputs for the design team and clear O&M guidance where required.

Qualifications & Experience

• BE(Hons) or MEng (Civil/Environmental) or equivalent; Chartered or working toward CMEngNZ (highly regarded).


• 5–12+ years Civil Engineering experience with 3 waters experience in stormwater and ideally experience with 3D modelling for land development in NZ (or highly transferable markets overseas).


• Experience preferred with 3D modelling software like DHI MIKE FLOOD or NIWA (in New Zealand or Overseas)


• Proven delivery of 1D/2D integrated models for subdivisions and structure‑plan areas, including design iteration through to IFC drawings.


• Strong understanding of hydrologic methods, design storms, temporal patterns, losses, roughness, stability of solutions, and sensitivity/uncertainty analysis.


• Familiarity with NZ development and consenting context (local authority codes/guides, climate change allowances, water quality/treatment performance expectations).


• Excellent written and visual communication—clear model reports, figures, and flood maps for technical and non‑technical audiences.