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List of critical infrastructure operators in Arizona

Tamtam tracks 69 critical infrastructure operators headquartered in Arizona. This list ranks all of them by number of employees on LinkedIn, led by Banner Health, Republic Services and Swift Transportation. Their median headcount is 1,143. Half of them were founded in 1969 or later. The most common headquarters are Phoenix (28), Scottsdale (10) and Tucson (10).

馃嚭馃嚫 Arizona69 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Banner Healthbannerhealth.com

Nonprofit healthcare system operating hospitals, urgent care, clinics, home care, hospice, pharmacies, and physician groups across six states.

Hospitals and Health Care 馃嚭馃嚫 Phoenix 35,542 1999
2
Republic Servicesrepublicservices.com

An industry leader in environmental services, providing innovative solutions for waste management, recycling, and sustainability to create cleaner and more sustainable communities

Environmental Services 馃嚭馃嚫 Phoenix 21,081 1998
3
Swift Transportationswifttrans.com

Largest full-truckload motor carrier in North America with extensive terminal network offering diverse freight and logistics services.

Truck Transportation 馃嚭馃嚫 Phoenix 10,957 1966
4
HonorHealthhonorhealth.com

Dedicated team of physicians, employees, and volunteers providing quality healthcare services and strengthening communities by going above and beyond

Hospitals and Health Care 馃嚭馃嚫 Scottsdale 9,781 2013
5
Cable One/Sparklight Careerssparklight.com

This company provides scalable, reliable business solutions including high-speed internet, phone service, cable TV, and fiber-optic options for success

Telecommunications 馃嚭馃嚫 Phoenix 7,156 1983
6
Phoenix Children'slinktr.ee

An extensive pediatric health system in Arizona providing world-class inpatient, outpatient, trauma, emergency, and urgent care across 75 specialties

Hospitals and Health Care 馃嚭馃嚫 Phoenix 5,495 1983
7
LifeStance Healthlifestance.com

Behavioral health care company providing evidence-based treatment services for children, adolescents, and adults with mental health issues in various care settings

Hospitals and Health Care 馃嚭馃嚫 Scottsdale 5,378 2017
8
Salt River Projectsrpnet.com

Providing essential water and power services to the Phoenix area with a focus on customer satisfaction and innovative technology.

Utilities 馃嚭馃嚫 Tempe 5,372 1903
9
Western Alliance Bankwesternalliancebancorporation.com

Provides tailored commercial banking and consumer financial products with expert service, operating nationwide through multiple full-service banking brands.

Banking 馃嚭馃嚫 Phoenix 4,327 n/a
10
St. Joseph's Hospital and Medical Centerstjosephs-phx.org

A not-for-profit hospital in Phoenix offering quality medical care, research, education, and specialized services in neurology, cardiology, trauma, and more

Hospitals and Health Care 馃嚭馃嚫 Phoenix 3,297 1895
11
Arizona Public Service - APSaps.com

Arizona's largest and longest serving electric utility, providing power to nearly 12 million customers in 11 counties with a focus on sustainability and customer satisfaction

Utilities 馃嚭馃嚫 Phoenix 3,112 1886
12
Tucson Medical Centertmcaz.com

Locally governed nonprofit hospital offering emergency, pediatric, intensive care, women鈥檚, cardiovascular, orthopaedic, neuroscience, hospice, imaging, and senior services.

Hospitals and Health Care 馃嚭馃嚫 Tucson 2,808 1943
13
Knight Transportationlinktr.ee

A truckload carrier providing dry van, refrigerated, intermodal, and brokerage services nationwide, offering personalized attention and integrated freight transportation for various industries

Truck Transportation 馃嚭馃嚫 Phoenix 2,775 1990
14
Loginloginbusiness.com

Arizona-based provider of business phone service, internet access, and secure data storage solutions Fully licensed and accredited by AZ ROC

Telecommunications 馃嚭馃嚫 Tucson 2,708 2001
15
City of Tucsontucsonaz.gov

City government managing municipal operations, led by elected Mayor and Council, with City Manager executing policies and administration.

Government Administration 馃嚭馃嚫 Tucson 2,489 n/a
16
Consumer Cellular, Inc.consumercellular.com

Provides no-contract cellphones and service plans, primarily to individuals aged 50-plus, utilizing a nationwide network and sold at major retailers.

Telecommunications 馃嚭馃嚫 Scottsdale 2,226 1995
17
Arizona Department of Transportationazdot.gov

The company provides highway infrastructure and transportation services, aiming to connect people safely and empower the economy with collaborative and results-focused values

Government Administration 馃嚭馃嚫 Phoenix 2,160 1912
18
Mesa Airlines, Inc.mesa-air.com

A regional airline operating for over 35 years, partnering with United Airlines as United Express carrier with hubs across the United States, Canada, and Mexico

Airlines and Aviation 馃嚭馃嚫 Phoenix 2,148 1982
19
Sagicor Life Insurance Company USAsagicor.com

A highly rated life insurance company focused on helping clients make wise financial decisions for future protection, operating in multiple countries

Insurance 馃嚭馃嚫 Scottsdale 2,085 1954
20
City of Mesamesaaz.gov

The organization provides municipal services and recreational opportunities for the residents of Mesa, emphasizing a diverse and inclusive workplace culture

Government Administration 馃嚭馃嚫 Mesa 2,002 1878
21
Vitalantvitalant.org

Leading nonprofit providing safe blood supply, laboratory services, transfusion medicine expertise, and research to hospitals and patients nationwide Relies on donations and volunteers

Hospitals and Health Care 馃嚭馃嚫 Scottsdale 1,961 1943
22
Abrazo Healthabrazohealth.com

An Arizona healthcare system with hospitals, specialty institutes, medical groups, and health plans focusing on employee wellness and personalized healthcare

Hospitals and Health Care 馃嚭馃嚫 Phoenix 1,938 2003
23
Centuri Group, Inc.centuri.com

Strategic infrastructure services company partnering with utilities to build, maintain energy networks delivering electricity and natural gas safely and sustainably.

Construction 馃嚭馃嚫 Phoenix 1,912 n/a
24
Cogir Senior Livingcogirusa.com

Drawing on 20 years of experience in senior living and hospitality management, we offer unforgettable French-inspired senior living residences on the West Coast

Nursing Homes and Residential Care Facilities 馃嚭馃嚫 Scottsdale 1,883 n/a
25
Onvida Healthonvidahealth.org

Delivers compassionate innovative care through talented providers and state-of-the-art facilities while supporting local health careers to ensure a healthier future for the community.

Hospitals and Health Care 馃嚭馃嚫 Yuma 1,809 1958
26
Early Warningearlywarning.com

financial services technology company providing risk management, fraud prevention, and payment solutions to banks, credit unions, and consumers

Financial Services 馃嚭馃嚫 Scottsdale 1,759 1990
27
Valleywise Healthvalleywisehealth.org

Provider of quality healthcare services in Maricopa County for over 140 years, now operating under the name Valleywise Health Promoting healthier communities through accessible care

Hospitals and Health Care 馃嚭馃嚫 Phoenix 1,728 1877
28
Western Alliance Bancorporationwesternalliancebancorporation.com

A top-performing banking company with $30 billion in assets, offering customized financial services through experienced bankers for businesses nationwide

Banking 馃嚭馃嚫 Phoenix 1,525 n/a
29
City of Scottsdalescottsdaleaz.gov

Providing municipal services and maintenance for desert preserves, urban business districts, and residential neighborhoods within this Arizona desert community for residents.

Government Administration 馃嚭馃嚫 Scottsdale 1,425 n/a
30
Tucson Electric Powertep.com

A leading energy provider in Tucson, delivering safe, reliable power to over 442,000 customers Committed to community service, volunteerism, and economic development

Utilities 馃嚭馃嚫 Tucson 1,425 1892
31
Arizona Health Care Cost Containment System (AHCCCS)azahcccs.gov

Providing comprehensive Medicaid coverage to over 19 million Arizonans through a managed care system focusing on quality health care and cost reduction

Hospitals and Health Care 馃嚭馃嚫 Phoenix 1,244 1982
32
City of Chandler, Arizonachandleraz.gov

The City of Chandler, Arizona is a vibrant and diverse community, transitioning from an agricultural town to a hub for innovation and technology

Government Administration 馃嚭馃嚫 Chandler 1,204 1912
33
Sparklightsparklight.com

A leading broadband communications provider offering high-speed internet, cable television, phone service, and digital marketing solutions to residential and business customers nationwide

Telecommunications 馃嚭馃嚫 Phoenix 1,158 1986
34
Carondelet Health Networkcarondelet.org

A network of hospitals and medical centers in Southern Arizona providing high-quality care in various specialties, with a focus on improving patient health

Hospitals and Health Care 馃嚭馃嚫 Tucson 1,155 1880
35
Kingman Regional Medical Centerazkrmc.com

A leading healthcare system in Kingman, Arizona offering a wide range of services including advanced imaging, cancer treatment, cardiovascular care, and medical education

Hospitals and Health Care 馃嚭馃嚫 Kingman 1,143 n/a
36
Rural/Metro Corporationamr.net

National provider of 911 emergency ambulance, interfacility transport, and community and industrial fire protection services across multiple states.

Hospitals and Health Care 馃嚭馃嚫 Scottsdale 1,126 1948
37
Hospice of the Valleyhov.org

Leader in hospice care providing excellence in end-of-life services in central Arizona Innovative programs, quality staff, and inclusive support for patients and families

Hospitals and Health Care 馃嚭馃嚫 Phoenix 1,125 1977
38
Desert Financial Credit Uniondesertfinancial.com

This company is a locally-based credit union in Arizona, focused on providing financial solutions to over 350,000 members and strengthening the local economy

Financial Services 馃嚭馃嚫 Phoenix 1,069 1939
39
Gila River Health Caregrhc.org

A healthcare organization within the Gila River Indian Community dedicated to providing high-quality patient care with kindness, dignity, and cultural sensitivity

Hospitals and Health Care 馃嚭馃嚫 Sacaton 979 n/a
40
El Rio Community Health Centerelrio.org

A non-profit health center in Tucson providing comprehensive, affordable, and compassionate medical and dental care to over 125,000 patients

Hospitals and Health Care 馃嚭馃嚫 Tucson 974 1970
41
Maricopa Integrated Health Systemvalleywisehealth.org

A healthcare system in Phoenix, Arizona, dedicated to serving the underserved with Level I Trauma Center, Burn Center, HIV primary care, and family health centers

Hospitals and Health Care 馃嚭馃嚫 Phoenix 957 1877
42
City of Glendale AZglendaleaz.gov

Providing essential information, events and festivals, and a memorable experience in Glendale, Arizona through a variety of services and entertainment options

Government Administration 馃嚭馃嚫 Glendale 928 n/a
43
Barrow Neurological Institutebarrowneuro.org

Preserving and protecting thoughts, memories, dreams, personalities, and movement to prioritize what matters most

Hospitals and Health Care 馃嚭馃嚫 Phoenix 918 1962
44
Southwest Behavioral & Health Servicessbhservices.org

The company provides compassionate care and services in behavioral health, focusing on housing, prevention, outpatient services, and treatment of co-occurring disorders

Mental Health Care 馃嚭馃嚫 Phoenix 912 1969
45
Terros Healthterroshealth.org

Health care company specializing in mental health and substance use treatment, providing primary care to help individuals live in recovery and save lives

Hospitals and Health Care 馃嚭馃嚫 Phoenix 905 1969
46
National Bank of Arizonanbarizona.com

This company provides exceptional customer service and builds local relationships by offering financial services through nearly 500 local financial centers

Banking 馃嚭馃嚫 Phoenix 833 1984
47
Yavapai Regional Medical Centercommonspirit.careers

A not-for-profit healthcare provider offering a wide range of inpatient and outpatient services, including hospitals, clinics, wellness centers, and specialized programs

Hospitals and Health Care 馃嚭馃嚫 Prescott 824 1957
48
PHI Air Medicalphiairmedical.com

A leading air ambulance provider offering air medical services, outreach education to local communities, and partnering with healthcare systems nationwide

Hospitals and Health Care 馃嚭馃嚫 Tempe 794 n/a
49
Wescom Credit Unionwescom.org

A nonprofit cooperative providing personalized financial services with better rates and benefits for members, supported by innovative technology and friendly service

Banking 馃嚭馃嚫 678 1934
50
Summit Healthcare Regional Medical Centersummithealthcare.net

A not-for-profit healthcare organization in Northeastern Arizona providing exceptional healthcare close to home for residents in a 3,000 square mile area

Hospitals and Health Care 馃嚭馃嚫 Show Low 661 1970
51
AdventHealth Medical Groupadventhealth.com

Promoting holistic health by providing compassionate care and world-class expertise to help individuals feel whole in body, mind, and spirit

Hospitals and Health Care 馃嚭馃嚫 Miami 580 n/a
52
Vantage West Credit Unionvantagewest.org

A $26 billion financial institution in Arizona offering consumer and business banking services online and at branches, including retirement accounts

Banking 馃嚭馃嚫 Tucson 572 1955
53
Arevonarevonenergy.com

Development, financing, construction, ownership, and operation of renewable energy projects focusing on solar and energy storage across the U.S.

Renewable Energy Power Generation 馃嚭馃嚫 Scottsdale 319 n/a
54
Donor Network of Arizonadnaz.org

The company is a not-for-profit organization in Arizona that promotes organ and tissue donation, facilitates recovery, and supports donor families

Non-profit Organizations 馃嚭馃嚫 Tempe 298 1993
55
BANNER DESERT MEDICAL CENTER

A medical devices company located in Mesa, Arizona, specializing in providing innovative healthcare solutions and technologies to Banner Desert Medical Center

Medical Equipment Manufacturing 馃嚭馃嚫 Mesa 245 n/a
56
Cordiacordiaenergy.com

Sustainable energy solutions provider specializing in district energy, combined heat and power, and microgrids for various sectors across the United States

Utilities 馃嚭馃嚫 Phoenix 220 2022
57
Hughes Federal Credit Unionhughesfcu.org

A local, member-owned financial institution providing services to over 175,000 members with a focus on community support and employee investment

Banking 馃嚭馃嚫 Tucson 215 1952
58
Crexendo庐 Business Solutionscrexendo.com

This company offers award-winning UCaaS and CCaaS solutions for businesses of all sizes, with a focus on cloud communication and collaboration services

Telecommunications 馃嚭馃嚫 Tempe 156 1995
59
Pinnacle West Capital Corporationpinnaclewest.com

Arizona-based energy company providing electricity and energy-related products and services through affiliates, serving over a million customers and operating a major nuclear generating station

Utilities 馃嚭馃嚫 Phoenix 138 1894
60
Tucson Federal Credit Uniontucsonfcu.com

financial cooperative providing banking services, loans, and financial education to community members, employees, students, and families in Pima County

Financial Services 馃嚭馃嚫 Tucson 108 1937
61
Mohave Electric Cooperative, Incmohaveelectric.com

The company specializes in providing electricity services to customers, ensuring reliable and efficient energy delivery for residential and commercial purposes

Utilities 馃嚭馃嚫 Bullhead City 79 1946
62
JoyRide Logistics LLCjoyridelogistics.com

Provides logistics and trucking services with a fleet of over 250 trucks and drivers, prioritizing customer satisfaction, diversity, and community support across the Southwest.

Truck Transportation 馃嚭馃嚫 Chandler 65 2014
63
Richmond Power and Lightrp-l.com

This company is a public electric energy utility providing energy services to the community

Utilities 馃嚭馃嚫 49 n/a
64
Casillas Petroleum Corpcasillaspetro.com

A privately held company focused on domestic exploration, development, and production of oil and natural gas with a dedicated team of professionals

Oil and Gas 馃嚭馃嚫 43 1986
65
AERO Financialaerofinancial.com

A financial cooperative providing award-winning products and services for over 60 years, emphasizing member-focused solutions, employee engagement, and community involvement

Financial Services 馃嚭馃嚫 Glendale 37 1957
66
Bank of Tucson a division of Grandpoint Bankbankoftucson.com

A strong and fast-growing bank offering expanded deposit and lending solutions with a wider branch footprint, while maintaining high quality service and local market knowledge

Banking 馃嚭馃嚫 Tucson 36 1996
67
SouthWestern Power Groupsouthwesternpower.com

Independent merchant energy generation and transmission development team with projects in Arizona and New Mexico including Bowie Power Station and SunZia Southwest Transmission Project

Electric Power Generation 馃嚭馃嚫 Phoenix 16 2000
68
First Credit Unionfirstcredit.pw

A global financial services leader providing personal, business, and institutional banking and wealth management services to millions of customers worldwide

Financial Services 馃嚭馃嚫 Chandler 12 2012
69
Clearway Community Energyclearwaycommunityenergy.com

Comprehensive energy solutions provider specializing in district energy, combined heat and power, and microgrids for a sustainable, resilient energy future

Utilities 馃嚭馃嚫 Phoenix 8 n/a

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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 Oct 24, 2026.

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