Company lists · Data refreshed September 2026

Top 25 Hydropower engineering consultancy companies based in New Zealand

Name: Hydropower engineering consultancy companies based in New Zealand
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 70 companies tracked

RevenueBase identified 70 hydropower engineering consultancy companies headquartered in New Zealand as of September 2026 and tracks 2,533 professional contacts across them, including 758 with verified work emails and 62 with mobile numbers. Auckland is the largest hub.

This list covers hydropower engineering consultancy companies headquartered in New Zealand, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

70Companies

2,533Contacts tracked

758Verified emails

62Mobile numbers

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The 25 largest hydropower engineering consultancy companies based in New Zealand

Ranked by team size

Top 25 of 70 hydropower engineering consultancy companies based in New Zealand, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydropower engineering consultancy companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Opus International Consultants LimitedIndirect evidence	Wellington, New ZealandHQ checked Sep 3, 2026	1,001-5,000	569
	Source: company website · checked Sep 3, 2026
2	Ergo ConsultingStrong evidence	Auckland, New ZealandHQ checked Sep 3, 2026	51-200	110
	“Ergo aspires to be New Zealand’s first choice provider of engineering consultancy services to the power and energy industry.” Source: company website · checked Sep 3, 2026
3	Riley ConsultantsPartial evidence	Takapuna, New ZealandHQ checked Sep 3, 2026	51-200	86
	“Our company has evolved from humble yet visionary origins to become the multi-disciplinary consultancy it is today.” Source: company website · checked Sep 3, 2026
4	Powell FenwickStrong evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	51-200	79
	“Powell Fenwick is a Christchurch based engineering consultancy firm with significant experience in all facets of building design and construction.” Source: company website · checked Sep 3, 2026
5	Edison Consulting GroupPartial evidence	Auckland, New ZealandHQ checked Sep 3, 2026	51-200	75
	“Edison Consulting Group provides specialist project management, design engineering and advisory services, delivering successful energy projects to the New Zealand energy sector.” Source: company website · checked Sep 3, 2026
6	GroundlineStrong evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	51-200	71
	“GROUNDLINE is a global engineering consultancy dedicated to keeping the lights on, with offices in Australia, New Zealand, and the United Kingdom.” Source: company website · checked Sep 3, 2026
7	MTL NZPartial evidence	New ZealandHQ checked Sep 3, 2026	51-200	64
	“Founded in 1994, MTL specialises in engineering design and project management for renewable energy, water infrastructure and industrial projects.” Source: company website · checked Sep 3, 2026
8	GWE Consulting EngineersStrong evidence	Takapuna, New ZealandHQ checked Sep 3, 2026	11-50	42
	“GWE Consulting Engineers is a multi-disciplinary engineering consultancy providing geotechnical, civil and water, environmental, wastewater and stormwater engineering services and…” Source: company website · checked Sep 3, 2026
9	CGW Consulting EngineersPartial evidence	Nelson, New ZealandHQ checked Sep 3, 2026	11-50	40
	“CGW Consulting Engineers is a multi-discipline consulting engineering firm with its head office in Nelson serving our clients’ needs for projects throughout New Zealand and…” Source: company website · checked Sep 3, 2026
10	Damwatch Engineering LTDStrong evidence	New ZealandHQ checked Sep 3, 2026	11-50	40
	“Damwatch is a highly respected niche consultancy business based in Wellington, New Zealand and provide services to hydropower, water and irrigation clients internationally.” Source: company website · checked Sep 3, 2026
11	Engco Consulting EngineersPartial evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	51-200	39
	“ENGCO is a multi-disciplinary national consultancy with expertise delivering large scale projects, worth in excess of $100 million, and at the boutique end of the market…” Source: company website · checked Sep 3, 2026
12	ACH Consulting EngineersIndirect evidence	Auckland, New ZealandHQ checked Sep 3, 2026	11-50	37
	“Today ACH employs over 40 staff in their Auckland office with a number being Chartered Professional Engineers.” Source: company website · checked Sep 3, 2026
13	Mesh Consulting LimitedPartial evidence	Auckland, New ZealandHQ checked Sep 3, 2026	11-50	33
	“Since 2018, Mesh has been transforming the consulting engineering landscape within the building services sector, one project at a time.” Source: company website · checked Sep 3, 2026
14	Blue Barn Consulting LTDIndirect evidence	Auckland, New ZealandHQ checked Sep 3, 2026	11-50	28
	“Blue Barn Consulting was established in 2008, and is proudly 100% New Zealand owned and operated.” Source: company website · checked Sep 3, 2026
15	Regeneratenz LTDIndirect evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	23
	“RegenerateNZ Ltd.(Re-Generate) was formed in August 2017 as a specialist energy and water solutions business with commercial activities spanning; consulting, design, supply…” Source: company website · checked Sep 3, 2026
16	Fluid Engineering ConsultancyIndirect evidence	Tauranga, New ZealandHQ checked Sep 3, 2026	11-50	17
	“We design building services for a variety of projects.” Source: company website · checked Sep 3, 2026
17	StructexStrong evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	16
	“Structex combines the knowledge and experience of a large engineering consultancy with the effectiveness, close business relationships and agility of a small team.” Source: company website · checked Sep 3, 2026
18	Williamson Water & Land AdvisoryPartial evidence	Kumeu, New ZealandHQ checked Sep 3, 2026	11-50	16
	“Williamson Water & Land Advisory (WWLA) is a New Zealand based, employee owned, niche environmental consultancy.” Source: company website · checked Sep 3, 2026
19	Clendon Burns & Park LTDIndirect evidence	Wellington, New ZealandHQ checked Sep 3, 2026	11-50	14
	“Clendon Burns & Park ltd has operated as a firm of Consulting Structural and Civil Engineers in Wellington for over 60 years.” Source: company website · checked Sep 3, 2026
20	Dreamcast Group Consulting EngineersStrong evidence	Auckland, New ZealandHQ checked Sep 3, 2026	11-50	13
	“We provide Civil, Structural and Geotechnical Engineering consultancy services.” Source: company website · checked Sep 3, 2026
21	SWE Southern Water EngineeringPartial evidence	Blenheim, New ZealandHQ checked Sep 3, 2026	11-50	12
	“SWE (Southern Water Engineering) is a leading Marlborough-based engineering company specialising in water engineering, electrical and automation solutions, and pumping technology.” Source: company website · checked Sep 3, 2026
22	NEW Zealand Consulting Engineers LTDIndirect evidence	Wellington, New ZealandHQ checked Sep 3, 2026	11-50	11
	“WE ADD VALUE, NOT COST.” Source: company website · checked Sep 3, 2026
23	Fluent Infrastructure Solutions LimitedStrong evidence	Dunedin, New ZealandHQ checked Sep 3, 2026	11-50	11
	“Fluent Solutions is a Dunedin and Queenstown based Engineering Consultancy with a strong reputation and track record in providing Civil and Infrastructure, 3 Waters and…” Source: company website · checked Sep 3, 2026
24	Mcmahon LTDPartial evidence	Grafton, New ZealandHQ checked Sep 3, 2026	11-50	11
	“With a proud history of over 30 years servicing industry, we hold a unique position within the engineering sector in New Zealand.” Source: company website · checked Sep 3, 2026
25	E2environmental LTDStrong evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	10
	“e2Environmental is a highly experienced, full service civil engineering consultancy specialising in water engineering and land development.” Source: company website · checked Sep 3, 2026

Showing 25 of 70 hydropower engineering consultancy companies based in New Zealand

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Hydropower engineering consultancy companies based in New Zealand at a glance

As of Sep 3, 2026

11-50Median size (employees)

AucklandLargest hub · 22 HQs

62Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

5,001-10,000

Verified emails by last verification

0–30

31–60

61–90

441

90–180

259

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among hydropower engineering consultancy companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in New Zealand whose own description of what they do matches “hydropower engineering consultancy companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among hydropower engineering consultancy companies, and records with no verified work email. Companies headquartered outside New Zealand are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 758 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

How many hydropower engineering consultancy companies are there based in New Zealand?

RevenueBase identified 70 hydropower engineering consultancy companies headquartered in New Zealand as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Opus International Consultants Limited, headquartered in Wellington, tops this list with the largest team on record.

Which city has the most hydropower engineering consultancy companies?

Auckland leads with 22 headquartered companies, followed by Christchurch (13) and Wellington (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 758 verified decision-maker contacts tracked across these 70 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.