# 50 leading critical infrastructure operators in New Zealand

Tamtam tracks 100 critical infrastructure operators headquartered in New Zealand. This list ranks the 50 largest by number of employees on LinkedIn, led by Health New Zealand | Te Whatu Ora, Air New Zealand and ASB Bank. Their median headcount is 1,311. Half of them were founded in 1999 or later. The most common headquarters are Auckland (21) and Wellington (12).

This selection of New Zealand's critical infrastructure operators features large organizations, with a strong presence of healthcare providers and financial institutions. Health New Zealand | Te Whatu Ora manages the health system, while Air New Zealand provides air travel services. ASB Bank and Bank of New Zealand are key players in the banking sector. Spark New Zealand delivers telecommunications solutions, and NZ Transport Agency Waka Kotahi manages the land transport system.

A notable pattern is the concentration of headquarters in Auckland and Wellington. Auckland hosts companies like Air New Zealand, ASB Bank, and Spark New Zealand, covering aviation, banking, and telecommunications. Wellington is home to Health New Zealand | Te Whatu Ora, NZ Transport Agency Waka Kotahi, and NZ Post, representing healthcare, government administration, and logistics.

🇳🇿 New Zealand · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Health New Zealand \| Te Whatu Ora](https://www.tamtam.ai/c/health-new-zealand-te-whatu-ora) (healthnz.govt.nz)<br>Te Whatu Ora manages the health system at various levels, providing hospital services, public health initiatives, primary care, and improving health outcomes in partnership with the Māori Health Authority | Hospitals and Health Care | 🇳🇿 Wellington | 9,861 | 2022 |
| 2 | [Air New Zealand](https://www.tamtam.ai/c/air-new-zealand) (airnewzealand.com)<br>Leading airline providing innovative, customer-focused air travel services connecting New Zealand with the world, emphasizing strong values and culture. | Airlines and Aviation | 🇳🇿 Auckland | 7,894 |  |
| 3 | [ASB Bank](https://www.tamtam.ai/c/asb-bank) (asb.co.nz)<br>Providing business banking services, insights, advice, and resources to help established businesses in New Zealand grow and succeed. | Banking | 🇳🇿 Auckland | 6,643 | 1847 |
| 4 | [Bank of New Zealand](https://www.tamtam.ai/c/bank-of-new-zealand) (bnz.co.nz)<br>A leading financial institution in New Zealand with a 160-year history of helping customers achieve their financial goals and create a better future | Banking | 🇳🇿 Auckland | 5,522 | 1861 |
| 5 | [Spark New Zealand](https://www.tamtam.ai/c/spark-new-zealand) (spark.co.nz)<br>Providing advanced technology solutions, extensive network coverage, and enhanced customer experiences to support individuals and businesses across New Zealand. | Telecommunications | 🇳🇿 Auckland | 4,453 | 1987 |
| 6 | [Westpac New Zealand](https://www.tamtam.ai/c/westpac-new-zealand) (westpac.co.nz)<br>Providing personal, business, and agribusiness banking solutions across New Zealand with extensive branch and ATM network support. | Banking | 🇳🇿 New Zealand | 4,266 |  |
| 7 | [Health New Zealand \| Te Toka Tumai Auckland](https://www.tamtam.ai/c/health-new-zealand-te-toka-tumai-auckland) (adhb.health.nz)<br>The company provides health and disability services to over half a million people in Auckland, Northland, and nationwide, including hospital care and community support | Hospitals and Health Care | 🇳🇿 Auckland | 3,315 |  |
| 8 | [NZ Transport Agency Waka Kotahi](https://www.tamtam.ai/c/nz-transport-agency-waka-kotahi) (nzta.govt.nz)<br>Management and innovation of New Zealand's national land transport system ensuring safety, efficiency, sustainability, and connectivity for people and businesses. | Government Administration | 🇳🇿 Wellington | 2,863 | 2008 |
| 9 | [NZ Post](https://www.tamtam.ai/c/nz-post) (nzpost.co.nz)<br>Delivery partner for a digital world, providing innovative solutions for businesses through a state-of-the-art processing operation and efficient delivery services | Freight and Package Transportation | 🇳🇿 Wellington | 2,799 | 1840 |
| 10 | [Kiwibank](https://www.tamtam.ai/c/kiwibank) (kiwibank.co.nz)<br>A bank dedicated to supporting the people of New Zealand, creating a place where employees can belong, thrive, and make a difference | Banking | 🇳🇿 Wellington | 2,719 | 2002 |
| 11 | [KiwiRail](https://www.tamtam.ai/c/kiwirail) (kiwirail.co.nz)<br>A leading integrated transport network and tourism operator in New Zealand, committed to safety, wellbeing, and providing world-class service to customers | Truck Transportation | 🇳🇿 Wellington | 2,665 | 2008 |
| 12 | [Health New Zealand \| Waikato](https://www.tamtam.ai/c/health-new-zealand-waikato) (waikatodhb.health.nz)<br>Management and operation of daily healthcare services ensuring accessible and effective medical support for the Waikato region community. | Hospitals and Health Care | 🇳🇿 Hamilton | 2,558 | 2001 |
| 13 | [Health New Zealand \| Counties Manukau](https://www.tamtam.ai/c/health-new-zealand-counties-manukau) (countiesmanukau.health.nz)<br>Counties Manukau Health provides health and disability services to over 500,000 residents through collaboration, funding, hospital services, and health promotion initiatives, prioritizing health equity | Hospitals and Health Care | 🇳🇿 Auckland | 2,554 |  |
| 14 | [Genesis](https://www.tamtam.ai/c/genesis-auckland) (genesisenergy.co.nz)<br>Energy provider offering electricity, solar, and gas solutions with a focus on customer empowerment and innovative energy management options for homes and businesses | Utilities | 🇳🇿 Auckland | 2,502 | 1999 |
| 15 | [Health New Zealand \| Waitematā](https://www.tamtam.ai/c/health-new-zealand-waitemata) (waitematadhb.govt.nz)<br>Health New Zealand - Waitemata provides healthcare services to over 650,000 residents in Auckland's North Shore, Waitakere, and Rodney districts, including hospitals, mental health facilities, and community health services | Hospitals and Health Care | 🇳🇿 Auckland | 2,500 |  |
| 16 | [Health New Zealand \| Capital, Coast and Hutt Valley](https://www.tamtam.ai/c/health-new-zealand-capital-coast-and-hutt-valley) (healthnz.govt.nz)<br>A health district in Wellington with over 6,000 staff, operating three hospitals and a health center, providing healthcare services in the region | Hospitals and Health Care | 🇳🇿 Wellington | 2,373 | 1947 |
| 17 | [Auckland Transport](https://www.tamtam.ai/c/auckland-transport) (at.govt.nz)<br>Planning and funding local public transport, operating roading network, managing parking and traffic systems in Auckland region. | Government Administration | 🇳🇿 Auckland | 2,206 | 2010 |
| 18 | [Fletcher Construction](https://www.tamtam.ai/c/fletcher-construction) (fletcherconstruction.co.nz)<br>A team dedicated to planning, building, maintaining, and managing infrastructure in New Zealand and the South Pacific for generations to come | Construction | 🇳🇿 Auckland | 2,139 |  |
| 19 | [Hato Hone St John](https://www.tamtam.ai/c/hato-hone-st-john) (stjohn.org.nz)<br>A charity organization in New Zealand offering essential health services, Ambulance Services, first aid training, event medical services, and community programs | Hospitals and Health Care | 🇳🇿 Auckland | 1,860 | 1885 |
| 20 | [One New Zealand](https://www.tamtam.ai/c/one-new-zealand) (one.nz)<br>An organization representing New Zealand on LinkedIn | Telecommunications | 🇳🇿 Auckland | 1,820 | 2023 |
| 21 | [Delta Utility Services](https://www.tamtam.ai/c/delta-utility-services) (thinkdelta.co.nz)<br>Specializing in infrastructure, they construct, manage, and maintain energy and environmental infrastructure across a specific region in New Zealand | Utilities | 🇳🇿 Dunedin Central | 1,800 | 1998 |
| 22 | [2degrees](https://www.tamtam.ai/c/2degrees) (2degrees.nz)<br>Full service telecommunications provider offering mobile network coverage and internet services across New Zealand with strong customer focus. | Telecommunications | 🇳🇿 Auckland | 1,707 |  |
| 23 | [Z Energy NZ](https://www.tamtam.ai/c/z-energy-nz) (z.co.nz)<br>Largest transport energy provider in New Zealand offering fuel products, EV charging services, and electricity retail through Flick Electric. | Oil and Gas | 🇳🇿 Wellington | 1,476 | 2011 |
| 24 | [Health New Zealand \| Southern](https://www.tamtam.ai/c/health-new-zealand-southern) (healthnz.govt.nz)<br>Leading the health system in New Zealand's Southern region, providing high-quality, patient-centered health services and working to improve health outcomes for all | Hospitals and Health Care | 🇳🇿 Dunedin | 1,345 |  |
| 25 | [Transpower New Zealand](https://www.tamtam.ai/c/transpower-new-zealand) (transpower.co.nz)<br>Empowering New Zealand's energy future through innovation and sustainable solutions | Utilities | 🇳🇿 Wellington | 1,311 |  |
| 26 | [Capital & Coast District Health Board](https://www.tamtam.ai/c/capital-and-coast-district-health-board) (ccdhb.org.nz)<br>Operates three hospitals and a health center, employing over 6,000 staff in the Wellington region, serving Capital, Coast, and Hutt Valley | Hospitals and Health Care | 🇳🇿 Wellington South | 1,267 | 1847 |
| 27 | [Watercare Services Limited](https://www.tamtam.ai/c/watercare-services-limited) (watercare.co.nz)<br>Provides lifeline services, drinking water, wastewater treatment, and infrastructure planning for Aucklanders, protecting the environment, without chemicals, safely returning it. | Utilities | 🇳🇿 Auckland | 1,205 |  |
| 28 | [Tower Insurance](https://www.tamtam.ai/c/tower-insurance) (tower.co.nz)<br>A company offering insurance solutions in New Zealand and the Pacific, focused on providing simple and rewarding experiences for customers | Insurance | 🇳🇿 Auckland | 1,131 | 1869 |
| 29 | [Vector Limited](https://www.tamtam.ai/c/vector-limited) (vector.co.nz)<br>A leading distributor of electricity and gas in New Zealand, also operating in Australia and the Pacific Islands Providing innovative energy solutions | Utilities | 🇳🇿 Auckland | 1,091 | 1999 |
| 30 | [HealthcareNZ Limited](https://www.tamtam.ai/c/healthcarenz-limited) (healthcarenz.co.nz)<br>HealthCare NZ provides a wide range of healthcare services, specializing in community health, rehabilitation, disability support, mental health, behavior services, and training | Hospitals and Health Care | 🇳🇿 Wellington | 1,047 |  |
| 31 | [Contact Energy Ltd](https://www.tamtam.ai/c/contact-energy-ltd) (contact.co.nz)<br>A leading energy provider in New Zealand, focused on lowering carbon emissions and producing renewable energy for reliable access to energy | Utilities | 🇳🇿 Wellington | 1,044 | 1995 |
| 32 | [ProCare](https://www.tamtam.ai/c/procare) (procare.co.nz)<br>Leading healthcare provider delivering progressive, proactive, and equitable health and wellbeing services across Aotearoa for diverse communities. | Hospitals and Health Care | 🇳🇿 Auckland Central | 993 | 1995 |
| 33 | [Chorus NZ Limited](https://www.tamtam.ai/c/chorus-nz-limited) (chorus.co.nz)<br>Providing and innovating New Zealand's telecommunications network infrastructure, enabling digital connectivity and supporting businesses and communities nationwide. | Telecommunications | 🇳🇿 Auckland | 989 | 2011 |
| 34 | [Te Whatu Ora Te Pae Hauora o Ruahine o Tararua MidCentral](https://www.tamtam.ai/c/te-whatu-ora-te-pae-hauora-o-ruahine-o-tararua-midcentral) (midcentraldhb.govt.nz)<br>Health organization in New Zealand serving the Ruahine and Tararua regions with a focus on holistic well-being and healthcare services | Hospitals and Health Care | 🇳🇿 Palmerston North | 988 |  |
| 35 | [Tauranga City Council](https://www.tamtam.ai/c/tauranga-city-council) (tauranga.govt.nz)<br>A leading organization in Tauranga, New Zealand, providing infrastructure, services, and investment to enhance the city's livability and attract diverse talent | Government Administration | 🇳🇿 Tauranga | 971 |  |
| 36 | [Northpower](https://www.tamtam.ai/c/northpower) (northpower.nz)<br>An electricity and fibre network operator in Northland, New Zealand, providing specialist contracting services and focusing on community prosperity and safety | Utilities | 🇳🇿 North Island | 962 |  |
| 37 | [Oceania](https://www.tamtam.ai/c/oceania) (oceaniahealthcare.co.nz)<br>Transforming retirement and aged care experience to redefine living in a Village, prioritizing enjoyment, purpose, and individuality for a better lifestyle | Hospitals and Health Care | 🇳🇿 Auckland | 941 | 2008 |
| 38 | [Mercury NZ](https://www.tamtam.ai/c/mercury-nz) (mercury.co.nz)<br>A forward-thinking organization providing energy and telecommunications services, with a dedication to sustainability and creating a better future for New Zealand | Utilities | 🇳🇿 Auckland | 934 | 1999 |
| 39 | [WM New Zealand](https://www.tamtam.ai/c/wm-new-zealand) (wm.nz)<br>Leading environmental services provider in New Zealand, offering resource recovery, waste management, recycling, and sustainable solutions for a diverse range of clients | Environmental Services | 🇳🇿 Tamaki | 916 |  |
| 40 | [Auckland Airport](https://www.tamtam.ai/c/auckland-airport) (aucklandairport.co.nz)<br>Handles over 18.5 million passengers annually, supports tourism, trade, and economy, and invests in sustainable travel infrastructure. | Airlines and Aviation | 🇳🇿 Auckland | 888 | 1960 |
| 41 | [Meridian Energy](https://www.tamtam.ai/c/meridian-energy) (meridianenergy.co.nz)<br>This company generates electricity from renewable sources like water and wind, supplying homes, businesses, and farms in New Zealand | Utilities | 🇳🇿 Wellington | 868 | 1999 |
| 42 | [Health New Zealand \| Nelson Marlborough](https://www.tamtam.ai/c/health-new-zealand-nelson-marlborough) (nmdhb.govt.nz)<br>Health New Zealand - Nelson Marlborough is a major healthcare provider in the region, serving 145,000 people with hospitals, public health services, and community programs | Hospitals and Health Care | 🇳🇿 Nelson | 867 |  |
| 43 | [Health New Zealand \| Bay of Plenty](https://www.tamtam.ai/c/health-new-zealand-bay-of-plenty) (info.health.nz)<br>Provides healthcare services to a population of 200,000 in New Zealand, with a focus on enabling communities to achieve good health and independence | Hospitals and Health Care | 🇳🇿 Tauranga | 830 |  |
| 44 | [Health New Zealand \| Te Tai Tokerau Northland](https://www.tamtam.ai/c/health-new-zealand-te-tai-tokerau-northland) (healthnz.govt.nz)<br>A national health agency in Northland, providing health and disability services to 151,000 people Committed to improving population health and reducing inequities | Hospitals and Health Care | 🇳🇿 Whangarei | 806 |  |
| 45 | [Evolution Healthcare](https://www.tamtam.ai/c/evolution-healthcare) (evolutioncare.com)<br>Leading provider of healthcare services in New Zealand with hospitals, day hospitals, maternity hospital, mental health clinics, and specialist health and wellbeing services | Hospitals and Health Care | 🇳🇿 Auckland | 718 |  |
| 46 | [Greater Wellington](https://www.tamtam.ai/c/greater-wellington) (gw.govt.nz)<br>Regional council managing environment, flood protection, land, parks, public transport, water supply, policy development, and climate change planning. | Government Administration | 🇳🇿 Wellington | 709 |  |
| 47 | [Airways New Zealand](https://www.tamtam.ai/c/airways-new-zealand) (airways.co.nz)<br>Providing air navigation services across 30 million square kilometres of airspace, ensuring safe travel for all aircraft in New Zealand. | Airlines and Aviation | 🇳🇿 | 657 |  |
| 48 | [Health New Zealand \| Taranaki](https://www.tamtam.ai/c/health-new-zealand-taranaki) (tdhb.org.nz)<br>Provision of personal health, public health, and disability support services for geographically defined populations in the Taranaki region. | Hospitals and Health Care | 🇳🇿 New Plymouth | 611 |  |
| 49 | [Suncorp New Zealand](https://www.tamtam.ai/c/suncorp-new-zealand) (suncorp.co.nz)<br>Leading insurance company focused on improving financial wellbeing, delivering better customer outcomes, and fostering employee growth and empowerment. | Insurance | 🇳🇿 Cbd | 610 | 2016 |
| 50 | [Powerco](https://www.tamtam.ai/c/powerco) (powerco.co.nz)<br>Specializing in electricity and gas distribution through extensive networks, connecting homes and businesses with essential energy infrastructure across New Zealand | Utilities | 🇳🇿 New Plymouth | 592 |  |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in New Zealand

- [The largest companies in New Zealand](https://www.tamtam.ai/l/largest-companies-new-zealand) (839)
- [Multinational companies in New Zealand](https://www.tamtam.ai/l/multinational-companies-new-zealand) (146)
- [Retail chains in New Zealand](https://www.tamtam.ai/l/retail-chains-new-zealand) (101)
- [Public sector organisations in New Zealand](https://www.tamtam.ai/l/public-sector-organisations-new-zealand) (79)
- [Manufacturers in New Zealand](https://www.tamtam.ai/l/manufacturers-new-zealand) (61)
- [Education providers in New Zealand](https://www.tamtam.ai/l/education-companies-new-zealand) (59)
- [Government Administration companies in New Zealand](https://www.tamtam.ai/l/government-administration-companies-new-zealand) (57)
- [Companies with a mobile app in New Zealand](https://www.tamtam.ai/l/companies-with-mobile-app-new-zealand) (53)
- [Hospitals and Health Care companies in New Zealand](https://www.tamtam.ai/l/hospitals-and-health-care-companies-new-zealand) (50)
- [Healthcare providers in New Zealand](https://www.tamtam.ai/l/healthcare-providers-new-zealand) (49)
- [Professional services firms in New Zealand](https://www.tamtam.ai/l/professional-services-firms-new-zealand) (49)
- [Financial services firms in New Zealand](https://www.tamtam.ai/l/financial-services-firms-new-zealand) (48)
- [Companies with in-house R&D in New Zealand](https://www.tamtam.ai/l/r-and-d-companies-new-zealand) (43)
- [IT Services and IT Consulting companies in New Zealand](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-new-zealand) (43)
- [Publicly traded companies in New Zealand](https://www.tamtam.ai/l/publicly-traded-companies-new-zealand) (36)
- [Corporate groups and holding companies in New Zealand](https://www.tamtam.ai/l/holding-companies-new-zealand) (35)
- [Food and beverage companies in New Zealand](https://www.tamtam.ai/l/food-and-beverage-companies-new-zealand) (34)
- [Construction companies in New Zealand](https://www.tamtam.ai/l/construction-companies-new-zealand) (34)
- [Financial Services companies in New Zealand](https://www.tamtam.ai/l/financial-services-companies-new-zealand) (34)
- [Distributors and wholesalers in New Zealand](https://www.tamtam.ai/l/distributors-and-wholesalers-new-zealand) (34)
- [Retail companies in New Zealand](https://www.tamtam.ai/l/retail-companies-new-zealand) (33)
- [Food and Beverage Services companies in New Zealand](https://www.tamtam.ai/l/food-and-beverage-services-companies-new-zealand) (32)
- [SaaS companies in New Zealand](https://www.tamtam.ai/l/saas-companies-new-zealand) (31)
- [Higher Education companies in New Zealand](https://www.tamtam.ai/l/higher-education-companies-new-zealand) (29)

## The same list elsewhere in New Zealand

- [Critical infrastructure operators in Auckland](https://www.tamtam.ai/l/critical-infrastructure-operators-auckland) (33)

## The same list elsewhere

- [Critical infrastructure operators in the world](https://www.tamtam.ai/l/critical-infrastructure-operators-in-the-world) (23,312)

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Source: https://www.tamtam.ai/l/critical-infrastructure-operators-new-zealand