Top 89 critical infrastructure operators in Washington State (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	T-Mobile careers.t-mobile.com Leading US wireless provider delivering advanced 4G LTE and nationwide 5G networks, prioritizing customer value, service excellence, and innovation in Bellevue, Washington	Telecommunications	🇺🇸 Bellevue	96,232	n/a
2	Providence Health & Services providence.org A healthcare organization focused on providing compassionate care through a network of hospitals, clinics, and services across multiple states	Hospitals and Health Care	🇺🇸 Renton	20,360	n/a
3	Alaska Airlines alaskaair.com Passenger airline providing exceptional service through dedicated employees, focusing on safety, customer care, and community engagement.	Airlines and Aviation	🇺🇸 Seattle	13,396	n/a
4	MultiCare Health System jobs.multicare.org Largest community-based health system in Washington with 13 hospitals, 300+ care locations, serving Pacific Northwest with dedicated healthcare professionals.	Hospitals and Health Care	🇺🇸 Tacoma	12,817	n/a
5	City of Seattle seattle.gov Providing diverse public services across multiple departments to support community well-being, infrastructure, and inclusive city development.	Government Administration	🇺🇸 Seattle	10,924	n/a
6	PeaceHealth peacehealth.org A not-for-profit Catholic health system with 16,000 caregivers, 900 providers, and 10 medical centers serving Washington, Oregon, and Alaska communities	Hospitals and Health Care	🇺🇸 Vancouver	9,229	1891
7	Seattle Children's seattlechildrens.org Providing compassionate pediatric care, conducting breakthrough research, and supporting families to ensure children receive hope, care, and cures.	Hospitals and Health Care	🇺🇸 Seattle	8,756	1907
8	Swedish providence.org A powerful network of skilled physicians, care centers, research and treatments offering world-class care in the Puget Sound region	Hospitals and Health Care	🇺🇸 Seattle	8,501	n/a
9	Washington State Department of Social and Health Services dshs.wa.gov Transforming lives of Washington State's vulnerable residents through innovative social services, partnerships, and government relationships Services include healthcare, support, and assistance	Government Administration	🇺🇸 Olympia	6,674	n/a
10	Columbia Bank columbiabank.com A full-service Northwest community bank offering sophisticated solutions and local commitment through over 140 branches across Washington, Oregon, and Idaho	Banking	🇺🇸 Tacoma	6,178	1993
11	Virginia Mason Franciscan Health vmfh.org Integrated health system in Washington state with 11 hospitals and nearly 300 sites, providing high-quality care through a team of 18,000 staff and 5,000 physicians	Hospitals and Health Care	🇺🇸 Tacoma	5,999	n/a
12	Group Health ghc.org Healthcare provider serving over 11 million members in eight states and DC, including 651,000 from Group Health Cooperative in Washington	Hospitals and Health Care	🇺🇸 Seattle	4,556	1947
13	UW Medicine uwmedicine.org Integrated health system combining clinical care, research, and education to provide specialized and primary healthcare across multiple states.	Hospitals and Health Care	🇺🇸 Seattle	4,344	n/a
14	Harborview Medical Center uwmedicine.org Founded in 1877 as a six-bed hospital, now a leading academic medical center overlooking Puget Sound offering advanced medical care	Hospitals and Health Care	🇺🇸 Seattle	3,757	1877
15	MetroPCS metrobyt-mobile.com A wireless provider offering trade-off free all-unlimited plans with added value such as Amazon Prime and Google One, using advanced T-Mobile network	Telecommunications	🇺🇸 Bellevue	3,711	1994
16	Washington State Department of Transportation wsdot.wa.gov The company improves Washington's transportation system by maintaining highways, ferries, and more, while focusing on strategic investments, sustainability, and efficiency	Government Administration	🇺🇸 Olympia	3,609	1905
17	Premera Blue Cross premera.com Leading health plan in the Pacific Northwest providing comprehensive health benefits and tailored services for individuals and companies, improving lives through better healthcare solutions.	Insurance	🇺🇸 Mountlake Terrace	3,473	1933
18	University of Washington Medical Center uwmedicine.org A healthcare facility providing innovative, high-quality patient care with expanded services in oncology, radiology, and Neonatal Intensive Care	Hospitals and Health Care	🇺🇸 Seattle	3,167	1959
19	Puget Sound Energy pse.com A longstanding energy provider in Washington state serving over 11 million electric customers and 800,000 natural gas customers across 10 counties Visit psecom for more information	Utilities	🇺🇸 Bellevue	3,123	1873
20	Banner Bank bannerbank.com A community bank offering comprehensive financial services in Oregon, Washington, California, and Idaho with a focus on individual service and competitive products	Banking	🇺🇸 Walla Walla	3,016	1890
21	BECU becu.org A member-owned, not-for-profit financial cooperative putting people over profit, prioritizing members' and employees' needs, and emphasizing work satisfaction	Banking	🇺🇸 Tukwila	2,934	1935
22	Valley Medical Center valleymed.org A nonprofit healthcare provider offering a wide range of medical services including emergency care, specialty clinics, and skilled clinicians in Washington	Hospitals and Health Care	🇺🇸 Renton	2,830	1947
23	Integra allstream.com A leader in business communications offering voice, collaboration, connectivity, and managed IT services to help customers innovate and reach business goals	Telecommunications	🇺🇸 Vancouver	2,709	1846
24	Overlake Medical Center & Clinics overlakehospital.org A nonprofit regional medical center offering advanced healthcare services with a focus on superb clinical care and a healing environment	Hospitals and Health Care	🇺🇸 Bellevue	2,526	1960
25	Genoa Healthcare genoahealthcare.com A leading provider of behavioral health pharmacy services dedicated to improving the quality of life for individuals with complex health conditions	Mental Health Care	🇺🇸 Renton	2,342	2000
26	NAES naes.com A leading provider of operations, maintenance, construction, engineering and technical services for power generation industry, prioritizing safety, compliance, quality, and integrity	Utilities	🇺🇸 Issaquah	2,309	1980
27	Confluence Health confluencehealth.org Integrated rural healthcare system providing hospital, multi-specialty, and primary care services across North Central Washington communities with local focus.	Hospitals and Health Care	🇺🇸 Wenatchee	2,201	2013
28	Port of Seattle portseattle.org Ownership and operation of airport, fishing terminal, marinas, cruise and cargo terminals, real estate, supporting regional jobs and economic growth.	Government Administration	🇺🇸 Seattle	2,074	1911
29	Horizon Air horizonair.jobs A regional airline operating as the carrier of Alaska Airlines, with a fleet of Embraer 175 jet aircraft serving around 50 West Coast cities	Airlines and Aviation	🇺🇸 Seattle	2,074	1981
30	City of Tacoma tacoma.gov Mid-sized urban port city offering diverse cultural attractions, affordable housing, and a vibrant community of artists and entrepreneurs.	Government Administration	🇺🇸 Tacoma	2,037	n/a
31	King County Metro Transit kingcounty.gov A leading agency in King County providing innovative and sustainable public transportation services to connect people with communities and improve quality of life	Truck Transportation	🇺🇸 Wa	1,890	1973
32	Sound Transit soundtransit.org Planning, building, operating regional transit systems to provide alternatives to traffic and accommodate population growth in Central Puget Sound.	Urban Transit Services	🇺🇸 Seattle	1,825	1996
33	Emeritus brookdale.com Providing senior living solutions and enriching lives through comfortable environments, nutritious meals, stimulating activities, and compassionate care, now part of Brookdale® Senior Living family	Hospitals and Health Care	🇺🇸 Seattle	1,822	1993
34	CHI Franciscan Health vmfh.org The company focuses on creating personalized and convenient healthcare experiences through a combination of people, capabilities, and technology	Hospitals and Health Care	🇺🇸 Tacoma	1,820	n/a
35	Kadlec providence.org Integrated regional health care system providing highest quality care to half a million people in Southeastern Washington and Northeastern Oregon Part of Providence St Joseph Health system	Hospitals and Health Care	🇺🇸 Richland	1,810	n/a
36	Avista myavista.com Provider of energy services, electricity, and natural gas to customers in a service territory spanning 30,000 square miles across multiple states	Utilities	🇺🇸 Spokane	1,624	n/a
37	Madigan Army Medical Center madigan.tricare.mil A network of Army medical facilities providing comprehensive medical services to active duty service members, families, and retirees, with a focus on quality care, education, research, and community engagement	Hospitals and Health Care	🇺🇸 Tacoma	1,407	1944
38	WaFd Bank wafdbank.com A long-standing national bank dedicated to building healthy communities by providing straightforward banking solutions for clients since 1917	Banking	🇺🇸 Seattle	1,405	1917
39	St John WA stjohnwa.com.au A charitable organization providing high-quality first aid services in Western Australia for over 130 years, through career paramedics and volunteer services	Hospitals and Health Care	🇺🇸 Belmont	1,378	1887
40	Northwest Hospital & Medical Center uwmedicine.org A nonprofit community hospital offering comprehensive medical services, pioneering treatments, specialized cancer care, award-winning neurosciences programs, emergency services, and community health education	Hospitals and Health Care	🇺🇸 Seattle	1,300	1960
41	Washington Trust Bank watrust.com A community-driven bank, focused on building relationships and providing rewarding careers, serving individual, business, and wealth management clients	Banking	🇺🇸 Spokane	1,299	1902
42	SSA Marine ssamarine.com Global logistics company founded in 1949, with operations on five continents, offering advanced facilities and transportation solutions to improve customer experience and accelerate global business growth	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Seattle	1,250	1949
43	Aegis Living aegisliving.com A leader in senior assisted living and memory care, known for innovative programming, upscale design, and employee-centric culture across multiple states	Hospitals and Health Care	🇺🇸 Bellevue	1,231	1997
44	Vancouver Clinic tvc.org Delivering compassionate healthcare for over 90 years, focusing on personalized patient care through face-to-face interactions and genuine human connections	Medical Practices	🇺🇸 Vancouver	1,220	1936
45	The Everett Clinic optum.com A nationally-recognized physician group providing high-quality healthcare services across 30 care sites, offering a range of medical specialties and services	Hospitals and Health Care	🇺🇸 Everett	1,207	1924
46	Seattle City Light seattle.gov This company is a large publicly owned utility providing affordable, reliable, and environmentally responsible power to homes and businesses in Seattle and surrounding areas	Utilities	🇺🇸 Seattle	1,187	1910
47	Ziply Fiber ziplyfiber.com The company focuses on providing fast and reliable internet access to underserved areas through a locally owned and operated fiber network	Telecommunications	🇺🇸 Kirkland	1,175	2020
48	Sea Mar Community Health Centers seamar.org A community-based organization providing quality health, housing, educational, and cultural services to diverse communities in Washington state	Hospitals and Health Care	🇺🇸 Seattle	1,174	1978
49	Energy Northwest energy-northwest.com Production and delivery of low-cost, reliable, and environmentally responsible electric power to Northwest public power utilities.	Utilities	🇺🇸 Richland	1,119	1957
50	HomeStreet Bank homestreet.com A community bank offering a full range of financial services focused on building long-term relationships, supporting communities, and promoting housing	Financial Services	🇺🇸 Seattle	982	1921
51	Yakima Valley Farm Workers Clinic yvfwc.com A nonprofit organization providing comprehensive medical, dental, social, and behavioral health services to diverse communities in Washington and Oregon	Hospitals and Health Care	🇺🇸 Toppenish	965	1978
52	US DEPT. OF VETERANS AFFAIRS dva.wa.gov A medical practice company located in Walla Walla, WA, providing services for veterans and their families in the United States	Medical Practices	🇺🇸 Walla Walla	953	2017
53	The Polyclinic optum.com A leading independent multi-specialty clinic in the Puget Sound area, providing high-quality, personalized care with over 170 physicians	Hospitals and Health Care	🇺🇸 Seattle	942	1917
54	Bloodworks Northwest bloodworksnw.org Nonprofit organization advancing transfusion medicine, patient care, and research in the Pacific Northwest through blood donations and tissue support	Hospitals and Health Care	🇺🇸 Seattle	926	1944
55	Skagit Regional Health skagitregionalhealth.org Healthcare leader in northwest Washington offering advanced technology, high quality care across two hospitals and a network of clinics, emphasizing patient-centered, compassionate healthcare services	Hospitals and Health Care	🇺🇸 Mount Vernon	889	n/a
56	Public Health – Seattle & King County kingcounty.gov Hospital & health care company located in Seattle, WA, focusing on public health initiatives and services for the community	Hospitals and Health Care	🇺🇸 Seattle	873	n/a
57	Compass Health compasshealth.org Championing well-being and advancing behavioral health in five Washington counties through innovative mental health services for adults, children, and families	Mental Health Care	🇺🇸 Everett	869	1901
58	Snohomish County PUD snopud.com providing electric utility services to over 875,000 residents and businesses across Snohomish County and Camano Island, maintaining extensive distribution infrastructure	Utilities	🇺🇸 Everett	837	1949
59	The Doctors Clinic thedoctorsclinic.com A multi-specialty, physician-owned medical group with seven clinic locations in Kitsap County, providing personalized and compassionate care for over 70 years	Medical Practices	🇺🇸 Silverdale	837	1945
60	Seattle Cancer Care Alliance fredhutch.org merger of Fred Hutchinson Cancer Research Center and Seattle Cancer Care Alliance into Fred Hutchinson Cancer Center for cancer research and care	Hospitals and Health Care	🇺🇸 Seattle	782	2001
61	Gesa Credit Union gesa.com Established in 1953, Gesa Credit Union is the second largest credit union in Washington state, serving over 260,000 members worldwide with financial services	Financial Services	🇺🇸 Richland	780	1953
62	Olympic Medical Center olympicmedical.org The company offers healthcare excellence, competitive salaries, benefits, and relocation assistance in the Pacific Northwest, promising a work-play paradise for employees	Hospitals and Health Care	🇺🇸 Port Angeles	761	n/a
63	Harrison Medical Center commonspirit.org A not-for-profit health system in Kitsap County offering medical, surgical, and emergency services with a focus on exceptional care and service quality	Hospitals and Health Care	🇺🇸 Bremerton	755	1918
64	Heritage Bank NW careers.heritagebanknw.com A bank founded in 1927, focused on community building and offering financial solutions to customers and local businesses in the Pacific Northwest	Banking	🇺🇸 Olympia	728	1927
65	Peoples Bank peoplesbank-wa.com A community-focused bank helping individuals, families, and businesses with well-informed financial decisions for over 100 years Schedule an appointment online	Banking	🇺🇸 Bellingham	714	1921
66	Pacific Medical Centers pacificmedicalcenters.org Private, not-for-profit health care network in Puget Sound with 9 clinics, 175 providers, cutting-edge technology, and patient-focused care for diverse population	Hospitals and Health Care	🇺🇸 Seattle	694	n/a
67	STCU stcu.org A top-performing credit union focused on serving members, fostering a positive workplace culture, and making a difference in the community	Financial Services	🇺🇸 Liberty Lake	690	1934
68	Hanford Mission Integration Solutions hmis.hanford.gov HMIS team provides integration solutions for the Hanford mission, focusing on safety, efficiency, cost savings, collaboration, and community value	Government Administration	🇺🇸 Richland	689	2021
69	City of Vancouver, Washington cityofvancouver.us Managing municipal operations and community services on the north bank of the Columbia River while providing recreational opportunities within a metropolitan setting.	Government Administration	🇺🇸 Vancouver	684	1857
70	Jefferson Healthcare jeffersonhealthcare.org Primary healthcare provider for eastern Jefferson County residents offering services such as surgical, orthopedic, oncology, diagnostic imaging, birth center, physical therapy, primary care clinics, and home health/hospice	Hospitals and Health Care	🇺🇸 Port Townsend	683	n/a
71	WSECU wsecu.org A not-for-profit credit union serving Washington residents with comprehensive financial services, community support, and a commitment to member satisfaction	Banking	🇺🇸 Olympia	659	1957
72	Liberty Mutual Surety™business.libertymutual.com A global provider of surety and guarantee solutions for construction companies and corporations, operating in over 60 countries with strong financial credit ratings	Insurance	🇺🇸 Seattle	656	n/a
73	Trios Health trioshealth.org A healthcare system in southeastern Washington offering a wide range of medical services and specialties, with a focus on compassionate patient care	Hospitals and Health Care	🇺🇸 Kennewick	647	1952
74	Skagit Valley Hospital skagitregionalhealth.org Skagit Regional Health is a leading healthcare provider in Northwest Washington, offering advanced medical services including cardiac care, cancer treatment, and outpatient services	Hospitals and Health Care	🇺🇸 Mount Vernon	642	1958
75	Chelan County PUD flow.page The company delivers clean, renewable, low-cost energy to local residents and utilities in the Pacific Northwest through hydro projects	Utilities	🇺🇸 Wenatchee	632	1936
76	Seattle Public Utilities seattle.gov The company partners with the community to manage water and waste resources equitably, promoting a healthy environment and economy for future generations	Government Administration	🇺🇸 Seattle	625	n/a
77	City of Kirkland kirklandwa.gov Waterfront destination in Kirkland with outdoor recreation, art, dining, and shopping City in Washington with a population of over 83,000	Government Administration	🇺🇸 Kirkland	617	1888
78	Oak Harbor Freight Lines oakh.com A family-owned LTL freight carrier with a strong focus on servicing the Western six states and providing high-quality, damage-free deliveries nationally and in Canada	Truck Transportation	🇺🇸 Auburn	599	1916
79	Community Transit communitytransit.org This company provides bus, paratransit, vanpool, and alternative commute services in Snohomish County, including Swift bus rapid transit lines and carpool options	Interurban and Rural Bus Services	🇺🇸 Everett	593	1976
80	Coastal coastalbank.com Providing innovative embedded finance solutions and secure financial products through collaboration, compliance, and cutting-edge technology to empower modern digital era marketplace partners.	Financial Services	🇺🇸 Everett	562	1997
81	Foss Maritime Company foss.com This company provides marine transportation and logistics services, offering safe and innovative solutions for transportation challenges and harbor jobs worldwide	Transportation, Logistics, Supply Chain and Storage	🇺🇸 Seattle	555	1889
82	Tacoma Power mytpu.org Public utility division serving over 166,000 customers in the Tacoma area, offering high-quality service, low rates, and innovative solutions in the electric utility industry	Utilities	🇺🇸 Tacoma	554	1893
83	Seattle Department of Transportation seattle.gov A leading municipal transportation agency in Seattle, dedicated to creating an equitable, sustainable, and vibrant city through maintenance, operations, and expansion of transportation networks	Government Administration	🇺🇸 Seattle	348	1996
84	Benton PUD bentonpud.org A trusted energy provider in Benton County, serving over 56,000 connections with reliable delivery systems, focused on community improvement and customer service	Utilities	🇺🇸 Kennewick	97	1946
85	U.S. Oil & Refining Co.usor.com A leading energy and infrastructure company with refining capacity, logistical systems, retail locations, and natural gas production assets in complex markets	Oil and Gas	🇺🇸 Tacoma	79	1952
86	Summit Power Group summitpower.com Project development company specializing in high-efficiency natural gas, carbon capture, and utility-scale solar and wind power projects with extensive experience in the energy industry	Oil and Gas	🇺🇸 Seattle	77	n/a
87	HFG Trust hfgtrust.com Local bank providing comprehensive lending, business, consumer, investment, and trust services Emphasizes personalized service and community involvement	Financial Services	🇺🇸 Kennewick	65	1983
88	Canopy Credit Union canopycu.com This company prioritizes financial wellness, personalized service, and community growth by providing loans, investments, credit lines, and technology-driven solutions	Financial Services	🇺🇸 Spokane	48	1956
89	CAI Logistics caimoves.com A global transportation company providing intermodal container leasing, rail leasing, operations, and logistics services worldwide for leading shipping lines and shippers	Truck Transportation	🇺🇸 Everett	33	1989

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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.

Top 89 critical infrastructure operators in Washington State

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