Company lists · Data verified August 2026

Top 25 Environmental consulting firms based in New Zealand

Name: Environmental consulting firms based in New Zealand
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 156 companies tracked

There are 156 environmental consulting firms headquartered in New Zealand (RevenueBase, August 2026). RevenueBase tracks 2,477 professional contacts across them, including 1,200 with verified work emails and 165 with mobile numbers. Auckland is the largest hub.

This list covers environmental consulting firms headquartered in New Zealand, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

156Companies

2,477Contacts tracked

1,200Verified emails

165Mobile numbers

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The 25 largest environmental consulting firms based in New Zealand

Ranked by team size

Top 25 of 156 environmental consulting firms based in New Zealand, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Opus International Consultants Limited	Wellington	1,001-5,000	569	68
2	Pattle Delamore Partners	Invercargill	201-500	272	231
3	EHS Support	Auckland	201-500	237	188
4	Babbage Consultants Limited	Hamilton	201-500	231	161
5	MBC	Papanui	11-50	99	1
6	Fraser Thomas LTD	Mount Maunganui	51-200	76	2
7	Mitchell Daysh	Nelson	11-50	45	37
8	Indufor LTD	n/a	51-200	43	13
9	AWA Environmental	Wellington	11-50	37	30
10	ACH Consulting Engineers	Auckland	11-50	37	26
11	Verum Group	Hamilton	11-50	32	17
12	Blue Barn Consulting LTD	Auckland	11-50	28	22
13	Geotheta Consulting Engineers And Scientists	Hastings	51-200	28	19
14	Bonisch	Te Anau	11-50	27	20
15	SQN	Whangarei	11-50	27	13
16	Novo Group Limited	Christchurch	11-50	22	21
17	Tektus	Auckland	11-50	20	15
18	Chemsafety LTD	Wellington	11-50	18	14
19	Mine Waste Management	Christchurch	11-50	17	14
20	Bioresearches A Babbage Company	Hamilton	11-50	17	13
21	Margules Groome Consulting	n/a	11-50	16	12
22	Williamson Water & Land Advisory	Kumeu	11-50	16	10
23	Irricon	Timaru South	11-50	15	11
24	E3scientific	Arrowtown	11-50	15	11
25	Kāhu Environmental Limited	Martinborough	11-50	15	3

Showing 25 of 156 environmental consulting firms based in New Zealand

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Environmental consulting firms based in New Zealand at a glance

As of Aug 28, 2026

1-10Median size (employees)

AucklandLargest hub · 45 HQs

165Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

110

11-50

51-200

201-500

1,001-5,000

Environmental consulting firms by metro

Metro	Companies
Environmental consulting firms in Auckland	45
Environmental consulting firms in Christchurch	24
Environmental consulting firms in Wellington	10
Environmental consulting firms in Hamilton	8
Environmental consulting firms in Tauranga	5
Environmental consulting firms in Invercargill	5
Environmental consulting firms in Palmerston North	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental consulting firms”, with match quality audited by blind human judging, and headquartered in New Zealand.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental consulting firms are there based in New Zealand?

There are 156 environmental consulting firms headquartered in New Zealand as of August 2026 (RevenueBase).

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 environmental consulting firms?

Auckland leads with 45 headquartered companies, followed by Christchurch (24) and Wellington (10).

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 1,200 verified decision-maker contacts tracked across these 156 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.