# 100 leading Human Resources Services companies in the United States

Tamtam tracks 291 Human Resources Services companies headquartered in the United States. This list ranks the 100 largest by number of employees on LinkedIn, led by ADP, LHH and Paychex. Their median headcount is 957. Half of them were founded in 1997 or later. The most common headquarters are New York (6), San Francisco (5) and Alexandria (3).

These Human Resources Services companies in the United States primarily offer solutions for HR, payroll, benefits, and workforce management. The companies listed are generally large firms, with the largest having 187,000 employees. Many were founded in the late 20th or early 21st century.

ADP focuses on improving workplace experiences through advanced HR products and services. Paychex provides HR, payroll, and benefits solutions for businesses, while Alight Solutions offers cloud-based human capital technology and services. Remote and Deel both provide comprehensive HR and payroll platforms for global workforces, with Remote focusing on hiring, managing, and paying employees worldwide, and Deel offering tools for international workforce management. Insperity provides comprehensive HR solutions for businesses. A common pattern is the concentration of headquarters in California, with San Francisco and Folsom hosting several companies.

🇺🇸 United States · 100 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ADP](https://www.tamtam.ai/c/adp) (adp.com)<br>Innovative company focusing on improving workplace experiences through advanced products and services in HR, talent, time management, benefits, and payroll | Human Resources Services | 🇺🇸 Roseland | 187,000 |  |
| 2 | [LHH](https://www.tamtam.ai/c/lhh) (lhh.com)<br>Global HR solutions provider offering advisory, career transition, leadership development, and recruitment services to organizations and individuals worldwide. | Human Resources Services | 🇺🇸 Jacksonville | 25,394 |  |
| 3 | [Paychex](https://www.tamtam.ai/c/paychex) (paychex.com)<br>Leading provider of HR, payroll, and benefits solutions for businesses in the US and Europe, serving over 740,000 clients and 22M worksite employees | Human Resources Services | 🇺🇸 Rochester | 18,530 | 1971 |
| 4 | [Alight Solutions](https://www.tamtam.ai/c/alight-solutions) (alight.com)<br>Leading cloud-based human capital technology and services provider for global organizations, administering employee benefits and empowering workforce decisions and engagement. | Human Resources Services | 🇺🇸 Chicago | 15,000 | 1940 |
| 5 | [Remote](https://www.tamtam.ai/c/remote-san-francisco) (remote.com)<br>Comprehensive HR and payroll platform enabling companies to hire, manage, and pay employees worldwide with compliance and local expertise. | Human Resources Services | 🇺🇸 San Francisco | 12,042 | 2019 |
| 6 | [Deel](https://www.tamtam.ai/c/deel) (deel.com)<br>Platform offering HR tools, payroll, compliance, and mobility services to help companies manage and scale international workforces efficiently. | Human Resources Services | 🇺🇸 San Francisco | 9,873 | 2019 |
| 7 | [Insperity](https://www.tamtam.ai/c/insperity) (insperity.com)<br>A provider of comprehensive HR solutions since 1986, enabling businesses to thrive with reduced liabilities, better benefits, and administrative relief | Human Resources Services | 🇺🇸 Kingwood | 5,053 | 1986 |
| 8 | [Government Support Jobs](https://www.tamtam.ai/c/government-support-jobs) (governmentsupportjobs.com)<br>Innovative career service specializing in government support jobs, connecting job seekers and employers in the public sector through technology | Human Resources Services | 🇺🇸 Reston | 4,813 |  |
| 9 | [TriNet](https://www.tamtam.ai/c/trinet) (trinet.com)<br>A provider of full-service HR solutions tailored for small and medium-size businesses, offering expertise in human capital, benefits, compliance, payroll, and technology | Human Resources Services | 🇺🇸 Dublin | 4,611 | 1988 |
| 10 | [Magnit Global](https://www.tamtam.ai/c/magnit-global) (magnitglobal.com)<br>Global leader in contingent workforce management, offering an Integrated Workforce Management platform for optimizing talent, diversity, operational, and financial success | Human Resources Services | 🇺🇸 Folsom | 3,927 | 1991 |
| 11 | [Vensure Employer Solutions](https://www.tamtam.ai/c/vensure-employer-solutions) (vensure.com)<br>A professional employer organization offering comprehensive services in payroll, HR, benefits, risk management, and workers' compensation utilizing industry-leading technology | Human Resources Services | 🇺🇸 Chandler | 3,292 | 2004 |
| 12 | [HireRight](https://www.tamtam.ai/c/hireright) (hireright.com)<br>Global provider of background checks, drug testing, and employment verification services through an innovative platform, tailored to meet the unique needs of organizations worldwide | Human Resources Services | 🇺🇸 Nashville | 3,283 |  |
| 13 | [Work From Home](https://www.tamtam.ai/c/work-from-home-modesto) (jobeelo.com)<br>Specializes in providing work from home job opportunities | Human Resources Services | 🇺🇸 Modesto | 3,037 |  |
| 14 | [State of Idaho](https://www.tamtam.ai/c/state-of-idaho) (dhr.idaho.gov)<br>A central human resources agency in Idaho providing consultation on recruitment, compensation, employee relations, classification, and HR management issues | Human Resources Services | 🇺🇸 Boise | 2,636 |  |
| 15 | [Apec - Association Pour l'Emploi des Cadres](https://www.tamtam.ai/c/apec-association-pour-l-emploi-des-cadres) (apec.fr)<br>Supports professionals, young graduates throughout career paths, offers recruitment optimization services for companies, provides market analysis on cadre employment trends. | Human Resources Services | 🇺🇸 Paris | 2,482 | 1966 |
| 16 | [SHRM](https://www.tamtam.ai/c/shrm) (shrm.org)<br>A member-driven organization focused on creating better workplaces, serving as an expert on work-related issues and impacting millions globally | Human Resources Services | 🇺🇸 Alexandria | 2,413 | 1948 |
| 17 | [Atlas HXM](https://www.tamtam.ai/c/atlas-hxm) (atlashxm.com)<br>Global talent management software and solutions provider for companies expanding internationally, offering Direct Employer of Record services in 160+ countries | Human Resources Services | 🇺🇸 Chicago | 2,161 | 2015 |
| 18 | [DDI \| Development Dimensions International](https://www.tamtam.ai/c/ddi-development-dimensions-international) (ddiworld.com)<br>Global leadership consulting firm assisting organizations with hiring, promotion, and development of exceptional leaders from first-time managers to senior C-suite executive levels. | Human Resources Services | 🇺🇸 Bridgeville | 2,120 | 1970 |
| 19 | [Pride Global](https://www.tamtam.ai/c/pride-global) (prideglobal.com)<br>An integrated human capital solutions firm with diverse HR services globally and a focus on treating stakeholders exceptionally | Human Resources Services | 🇺🇸 New York | 2,019 | 1983 |
| 20 | [USAJOBS](https://www.tamtam.ai/c/usajobs) (usajobs.gov)<br>The company maintains social media accounts to communicate with the public, providing information and guidelines to ensure respectful interaction | Human Resources Services | 🇺🇸 Washington | 2,010 | 1996 |
| 21 | [BambooHR](https://www.tamtam.ai/c/bamboohr) (bamboohr.com)<br>Leading HR software provider catering to small and medium businesses, helping manage employee information and freeing HR to be more strategic | Human Resources Services | 🇺🇸 Draper | 1,902 | 2008 |
| 22 | [BBSI](https://www.tamtam.ai/c/bbsi) (bbsi.com)<br>A PEO providing HR, payroll, workers' comp, benefits, and consulting services through a local support model to small and medium-sized businesses | Human Resources Services | 🇺🇸 Vancouver | 1,899 | 1972 |
| 23 | [Accurate Background](https://www.tamtam.ai/c/accurate-background) (accurate.com)<br>Global provider of employment background screening and workforce monitoring services, ensuring smarter hiring decisions with comprehensive technology, extensive coverage, and intuitive compliance tools | Human Resources Services | 🇺🇸 Irvine | 1,899 | 1997 |
| 24 | [O.C. Tanner](https://www.tamtam.ai/c/o-c-tanner) (octanner.com)<br>Provides an employee recognition platform combining software, awards, and experiences to improve workplace culture and employee engagement globally. | Human Resources Services | 🇺🇸 Salt Lake City | 1,765 | 1927 |
| 25 | [Cielo Talent](https://www.tamtam.ai/c/cielo-talent) (cielotalent.com)<br>Global partner providing innovative talent acquisition strategies and recruitment process outsourcing solutions to help companies secure top talent worldwide. | Human Resources Services | 🇺🇸 Wauwatosa | 1,727 | 2005 |
| 26 | [Safeguard Global](https://www.tamtam.ai/c/safeguard-global) (safeguardglobal.com)<br>Building adaptive solutions for global organizations in workforce management, recruitment, payroll, onboarding, and more to enable smarter and efficient operations | Human Resources Services | 🇺🇸 Austin | 1,718 | 2008 |
| 27 | [Hospital Pharmacist Jobs](https://www.tamtam.ai/c/hospital-pharmacist-jobs) (hospitalpharmacistjobs.com)<br>HPJ specializes in providing top-notch pharmacy professionals, carefully screening and evaluating candidates before referring them to clients Expert recruiters match ideal candidates to specific needs | Human Resources Services | 🇺🇸 Whitefish | 1,679 | 2002 |
| 28 | [OptimHire](https://www.tamtam.ai/c/optimhire) (optimhire.com)<br>Facilitating global collaboration, OptimHire revolutionizes the way professionals, recruiters, and companies work together anytime, anywhere across time zones and countries | Human Resources Services | 🇺🇸 San Francisco | 1,673 | 2018 |
| 29 | [Justworks](https://www.tamtam.ai/c/justworks) (justworks.com)<br>Platform providing payroll, HR tools, compliance support, and corporate-level benefits with 24/7 customer service for growing businesses. | Human Resources Services | 🇺🇸 New York | 1,623 | 2012 |
| 30 | [Servicios Profesionales](https://www.tamtam.ai/c/servicios-profesionales)<br>Provider of professional services offering a range of solutions to meet clients' needs | Human Resources Services | 🇺🇸 Santa Ana | 1,600 | 2021 |
| 31 | [Businessolver](https://www.tamtam.ai/c/businessolver) (businessolver.com)<br>Technology company providing a personalized platform for benefits administration, enhancing employee experience, informed decisions, and cost control. | Human Resources Services | 🇺🇸 Denver | 1,572 | 1998 |
| 32 | [Part Time Jobs Base](https://www.tamtam.ai/c/part-time-jobs-base) (parttimebase.co)<br>The company helps individuals find part-time jobs and work from home opportunities in the United States | Human Resources Services | 🇺🇸 Los Angeles | 1,569 | 2015 |
| 33 | [Edge](https://www.tamtam.ai/c/edge-mountain-view) (onedge.co)<br>This company offers a global HR solution connecting talent worldwide with businesses in North America, aiming to eliminate geographic barriers in hiring | Human Resources Services | 🇺🇸 Mountain View | 1,567 | 2022 |
| 34 | [Pontoon Solutions](https://www.tamtam.ai/c/pontoon-solutions) (pontoonsolutions.com)<br>Simplify and optimize contingent workforce management using technology and expertise, delivering MSP, procurement, and talent advisory globally. | Human Resources Services | 🇺🇸 Jacksonville | 1,517 | 2013 |
| 35 | [Wilson](https://www.tamtam.ai/c/wilson) (wilsonhr.com)<br>Global leader in total talent solutions with a focus on Recruitment Process Outsourcing, executive search, contingent talent solutions, and technology advisory across 65+ countries | Human Resources Services | 🇺🇸 Tampa | 1,483 |  |
| 36 | [Graebel Companies, Inc.](https://www.tamtam.ai/c/graebel-companies-inc) (graebel.com)<br>Global talent mobility solutions provider, specializing in relocation services for leading brands in 165 countries Focus on people-first mobility and custom technology solutions | Human Resources Services | 🇺🇸 Aurora | 1,463 | 1950 |
| 37 | [Randstad RiseSmart](https://www.tamtam.ai/c/randstad-risesmart) (randstadrisesmart.com)<br>A leading specialist in worklife coaching and career transitions, offering support for individuals and businesses in optimizing worklife experiences | Human Resources Services | 🇺🇸 Atlanta | 1,375 | 2007 |
| 38 | [Arkansas Department of Human Services](https://www.tamtam.ai/c/arkansas-department-of-human-services) (humanservices.arkansas.gov)<br>Arkansas' largest state agency with 7,400+ employees in 75 counties, dedicated to ensuring citizens of all ages have a high quality of life | Human Resources Services | 🇺🇸 Little Rock | 1,288 |  |
| 39 | [Multiplier](https://www.tamtam.ai/c/multiplier) (usemultiplier.com)<br>Global employment platform simplifying international team management by handling compliance, contracts, payroll, benefits, and taxes, allowing companies to focus on their distributed teams effortlessly | Human Resources Services | 🇺🇸 New York | 1,266 | 2020 |
| 40 | [Mineral, part of Mitratech](https://www.tamtam.ai/c/mineral-part-of-mitratech) (trustmineral.com)<br>Provides proactive HR and compliance solutions, combining data, technology, and human expertise for growing businesses. A leading HR community in the U.S. | Human Resources Services | 🇺🇸 Portland | 1,224 | 2005 |
| 41 | [Hacking HR](https://www.tamtam.ai/c/hacking-hr) (hackinghrlab.io)<br>Global learning community for business leaders and practitioners focusing on technology, workplace innovation, and professional collaboration to improve organizational performance and employee experiences. | Human Resources Services | 🇺🇸 Flagstaff | 1,208 | 2017 |
| 42 | [HUMAN RESOURCES](https://www.tamtam.ai/c/human-resources) (academyofpublicpolicies.org)<br>Provides human resource management services for organizations, including compliance, employee benefits, talent acquisition, and off-boarding procedures | Human Resources Services | 🇺🇸 New York | 1,147 |  |
| 43 | [Aires](https://www.tamtam.ai/c/aires) (aires.com)<br>Global relocation solutions provider recognized for client partnerships, technology, quality service, and certifications in ISO, FIDI-FAIM, C-TPAT, and Privacy Shield Visit wwwairescom | Human Resources Services | 🇺🇸 Pittsburgh | 1,118 | 1981 |
| 44 | [Empyrean](https://www.tamtam.ai/c/empyrean) (goempyrean.com)<br>A technology SaaS company empowering organizations with innovative technology and a service-first approach to accelerate benefits and employee retention strategies | Human Resources Services | 🇺🇸 Houston | 1,092 |  |
| 45 | [Oasis](https://www.tamtam.ai/c/oasis-west-palm-beach) (paychex.com)<br>Professional Employer Organization providing HR administration, employee benefits, payroll services, workers' comp, and more to small and medium-sized businesses | Human Resources Services | 🇺🇸 West Palm Beach | 1,076 | 1996 |
| 46 | [Talogy](https://www.tamtam.ai/c/talogy) (talogy.com)<br>Experts in talent management crafting solutions for screening, selecting, developing, and engaging talent worldwide using psychology and technology for data-driven decisions | Human Resources Services | 🇺🇸 Pittsburgh | 1,036 | 1946 |
| 47 | [Workhuman](https://www.tamtam.ai/c/workhuman) (workhuman.com)<br>This company is dedicated to creating human workplaces by providing HR solutions to help organizations build connections and drive ROI | Human Resources Services | 🇺🇸 Framingham | 1,008 | 1999 |
| 48 | [LHH + DBM](https://www.tamtam.ai/c/lhh-dbm) (lhh.com)<br>A global leader in talent mobility, offering unparalleled presence, innovative solutions, leading technology, and expertise to connect people to jobs and improve performance | Human Resources Services | 🇺🇸 Manhattan | 995 | 1972 |
| 49 | [TSC](https://www.tamtam.ai/c/tsc) (tsc.com)<br>Specializes in recruiting and talent search services, connecting companies with qualified candidates to fulfill their staffing needs efficiently. | Human Resources Services | 🇺🇸 New York | 967 | 2005 |
| 50 | [HRCI](https://www.tamtam.ai/c/hrci) (hrci.org)<br>Global leader in developing rigorous HR exams, offering advanced professional credentials worldwide, enhancing professional credibility and fostering continuing professional development for HR professionals | Human Resources Services | 🇺🇸 Alexandria | 957 | 1973 |
| 51 | [People2.0](https://www.tamtam.ai/c/people2-0) (people20.com)<br>Specializing in global employer and agent of record services for talent procurement, supporting companies in managing their workforce seamlessly | Human Resources Services | 🇺🇸 King of Prussia | 931 |  |
| 52 | [Benefitfocus](https://www.tamtam.ai/c/benefitfocus) (benefitfocus.com)<br>This company improves lives by simplifying benefit programs through innovative technology, focusing on health, engagement, and better outcomes for organizations and individuals | Human Resources Services | 🇺🇸 Charleston | 924 |  |
| 53 | [OneSource Virtual](https://www.tamtam.ai/c/onesource-virtual) (onesourcevirtual.com)<br>OneSource Virtual offers co-sourced HR, Finance, and Accounting solutions for Workday customers across North America and EMEA, with a focus on growth and expertise | Human Resources Services | 🇺🇸 Dallas | 923 | 2008 |
| 54 | [BGRS](https://www.tamtam.ai/c/bgrs) (sirva.com)<br>Global mobility solutions provider offering tailored programs for organizations to meet talent needs worldwide with focus on customer experience | Human Resources Services | 🇺🇸 Oakbrook Terrace | 913 | 1963 |
| 55 | [DISA Global Solutions, Inc.](https://www.tamtam.ai/c/disa-global-solutions-inc) (disa.com)<br>Provider of full-service employee screening solutions since 1987 with a focus on workplace safety Services include drug testing, background screening, occupational medicine, safety training, and transportation compliance | Human Resources Services | 🇺🇸 Houston | 905 | 1986 |
| 56 | [G&A Partners](https://www.tamtam.ai/c/g-and-a-partners) (gnapartners.com)<br>Providing expert HR and administrative services, implementing efficient processes, reducing costs, and supporting businesses with certified professionals. | Human Resources Services | 🇺🇸 Houston | 867 | 1995 |
| 57 | [HRSG - Innovative Business Solutions](https://www.tamtam.ai/c/hrsg-innovative-business-solutions) (hrsgonline.com)<br>Providing global business solutions including leadership selection, team management, HR outsourcing, consulting, and training to optimize clients' workforce and operations. | Human Resources Services | 🇺🇸 | 862 | 1992 |
| 58 | [Partnaire France](https://www.tamtam.ai/c/partnaire-france) (partnaire.fr)<br>Provides extensive staffing solutions across France with over 238 locations and 59,000 employees in permanent, temporary, and contract roles. | Human Resources Services | 🇺🇸 Olivet | 837 |  |
| 59 | [Freshers job](https://www.tamtam.ai/c/freshers-job) (theelitejob.com)<br>This company offers HR consultancy, staffing services, business consulting, and freelance jobs to support organizations and individuals in various industries | Human Resources Services | 🇺🇸 Addison | 818 | 2015 |
| 60 | [Automatic Data Processing](https://www.tamtam.ai/c/automatic-data-processing) (adp.com)<br>Global provider of cloud-based HCM solutions including HR, payroll, talent, and benefits administration Specializes in decision support technology customization for companies | Human Resources Services | 🇺🇸 Durham | 793 | 1997 |
| 61 | [Veterinary Jobs Marketplace®](https://www.tamtam.ai/c/veterinary-jobs-marketplace) (veterinaryjobsmarketplace.com)<br>A veterinary job marketplace that helps clinics and pharmaceutical companies find talented veterinarians, technicians, and nurses through targeted messaging and social media outreach | Human Resources Services | 🇺🇸 Las Vegas | 784 | 2016 |
| 62 | [Cisive](https://www.tamtam.ai/c/cisive) (cisive.com)<br>A leader in background screening, monitoring, and talent program optimization for highly regulated industries, prioritizing safety and success with high standards | Human Resources Services | 🇺🇸 Easton | 775 | 1977 |
| 63 | [Virginia Employment Commission](https://www.tamtam.ai/c/virginia-employment-commission) (vec.virginia.gov)<br>The company promotes economic growth by providing workforce services such as policy development, job placement, and training, while collaborating with stakeholders and embracing innovation | Human Resources Services | 🇺🇸 Richmond | 744 | 1915 |
| 64 | [RCI Recruitment Solutions](https://www.tamtam.ai/c/rci-recruitment-solutions) (rciars.com)<br>This company provides talent acquisition and management services, offering consulting and hands-on support to improve recruitment processes for organizations | Human Resources Services | 🇺🇸 Jupiter | 740 | 1974 |
| 65 | [Talent Solutions TAPFIN](https://www.tamtam.ai/c/talent-solutions-tapfin) (tapfin.com)<br>Industry-leading provider of Managed Services, enabling organizations to analyze and manage external talent globally through an integrated approach Visit website for more information | Human Resources Services | 🇺🇸 Milwaukee | 730 | 1972 |
| 66 | [LifeCare](https://www.tamtam.ai/c/lifecare) (lifecare.com)<br>LifeCare offers employer-sponsored work-life benefits and online discount shopping, serving Fortune 500 companies and federal government branches nationwide | Human Resources Services | 🇺🇸 Shelton | 721 | 1984 |
| 67 | [Marketplace Chaplains](https://www.tamtam.ai/c/marketplace-chaplains) (mchapusa.com)<br>Marketplace Chaplains provides personalized mental health care services through a diverse team of chaplains for employees and their families, promoting well-being and productivity in the workplace | Human Resources Services | 🇺🇸 Plano | 718 | 1984 |
| 68 | [nope](https://www.tamtam.ai/c/nope-austin) (linkedin.com)<br>An RPO and paid-search firm partnering with clients to hire talent committed to making a positive impact, focusing on seamless candidate experience | Human Resources Services | 🇺🇸 Austin | 706 | 2017 |
| 69 | [BASIC](https://www.tamtam.ai/c/basic-monona) (basiconline.com)<br>Provider of integrated HR solutions for employers nationwide since 1989 Specializing in payroll, compliance, benefits administration, and healthcare reform updates | Human Resources Services | 🇺🇸 Monona | 705 | 1989 |
| 70 | [Job Center](https://www.tamtam.ai/c/job-center) (jobcentermichigan.com)<br>A family-owned staffing company serving Metro Detroit and surrounding areas since 1983, specializing in temporary-to-hire placements | Human Resources Services | 🇺🇸 Troy | 703 | 1983 |
| 71 | [Asure Software](https://www.tamtam.ai/c/asure-software) (asuresoftware.com)<br>This company provides Human Capital Management solutions for small and mid-sized businesses to help with payroll, HR, compliance, and time & attendance | Human Resources Services | 🇺🇸 Austin | 684 | 1994 |
| 72 | [Awardco](https://www.tamtam.ai/c/awardco) (awardco.com)<br>This company offers a total rewards platform that boosts productivity, reduces spend, and builds culture through value-driven recognition and rewards | Human Resources Services | 🇺🇸 Lindon | 678 | 2015 |
| 73 | [cFIRST Background Checks LLP](https://www.tamtam.ai/c/cfirst-background-checks-llp) (cfirst.io)<br>A global background screening service provider with a focus on compliance, verification, and monitoring, offering innovative solutions for efficient hiring processes | Human Resources Services | 🇺🇸 Cincinnati | 653 | 2006 |
| 74 | [CoAdvantage](https://www.tamtam.ai/c/coadvantage) (coadvantage.com)<br>The company specializes in payroll processing, benefit administration, risk management, and employee development to help small businesses optimize HR practices and foster growth | Human Resources Services | 🇺🇸 Bradenton | 641 | 1997 |
| 75 | [Association for Talent Development (ATD)](https://www.tamtam.ai/c/association-for-talent-development-atd) (td.org)<br>Global association supporting talent development professionals worldwide through networking, resources, and events in industries across 120+ countries | Human Resources Services | 🇺🇸 Alexandria | 621 | 1943 |
| 76 | [Pakistan Jobs](https://www.tamtam.ai/c/pakistan-jobs) (webojobs.pk)<br>A job search platform in Pakistan connecting recruiters with qualified candidates for high tech jobs, offering free tools and hiring support | Human Resources Services | 🇺🇸 Frederick | 610 | 2012 |
| 77 | [Idaho Department of Labor](https://www.tamtam.ai/c/idaho-department-of-labor) (labor.idaho.gov)<br>This organization provides comprehensive services to connect job seekers with employment opportunities and support workers through career transitions while administering state labor laws | Human Resources Services | 🇺🇸 Boise | 596 | 1939 |
| 78 | [Oyster®](https://www.tamtam.ai/c/oyster) (oysterhr.com)<br>This company facilitates global hiring, enabling companies to easily recruit talent from anywhere, striving for a more inclusive and equal world | Human Resources Services | 🇺🇸 San Francisco | 595 | 2020 |
| 79 | [IMPACT Group](https://www.tamtam.ai/c/impact-group-saint-louis) (impactgrouphr.com)<br>Specializing in career transitions, relocation support, and outplacement services, we empower employees with the tools they need to succeed in their careers | Human Resources Services | 🇺🇸 St. Louis | 579 | 1988 |
| 80 | [Challenger, Gray & Christmas, Inc.](https://www.tamtam.ai/c/challenger-gray-and-christmas-inc) (challengergray.com)<br>A global leader in high-quality outplacement services, offering personalized coaching and support to individuals transitioning in various industries worldwide | Human Resources Services | 🇺🇸 Chicago | 578 | 1966 |
| 81 | [NutritionJobs](https://www.tamtam.ai/c/nutritionjobs) (nutritionjobs.com)<br>An online career center connecting Registered Dietitians and nutrition professionals with job opportunities, resume posting, and career courses since 2000 | Human Resources Services | 🇺🇸 San Francisco | 568 | 2000 |
| 82 | [USA Work Visa Sponsorship Jobs](https://www.tamtam.ai/c/usa-work-visa-sponsorship-jobs) (linktr.ee)<br>A curated job portal specializing in professional and no skills jobs with USA Visa Sponsorship opportunities Email admin@work-visa-usa-jobscom for inquiries | Human Resources Services | 🇺🇸 Clackamas | 567 |  |
| 83 | [Department of the Navy Office of Civilian Human Resources (OCHR)](https://www.tamtam.ai/c/department-of-the-navy-office-of-civilian-human-resources-ochr) (secnav.navy.mil)<br>Supporting the Department of the Navy, the Office of Civilian Human Resources ensures proper staffing and development for over 195,000 civilian employees | Human Resources Services | 🇺🇸 Washington Navy Yard | 566 |  |
| 84 | [Weichert Workforce Mobility](https://www.tamtam.ai/c/weichert-workforce-mobility) (weichertworkforcemobility.com)<br>A global relocation company providing end-to-end mobility solutions with personalized service, deep industry expertise, and comprehensive in-house capabilities since 1969 | Human Resources Services | 🇺🇸 Parsippany | 563 | 1969 |
| 85 | [PAE Global](https://www.tamtam.ai/c/pae-global) (archlatam.com)<br>A company that provides efficient and professional resources to meet client needs, focusing on customer satisfaction through personalized assistance and service | Human Resources Services | 🇺🇸 Santa Tecla | 559 | 1993 |
| 86 | [Virtual Latinos](https://www.tamtam.ai/c/virtual-latinos) (virtuallatinos.com)<br>A platform connecting entrepreneurs and agencies in the US and Canada with virtual assistants and professionals from Latin America | Human Resources Services | 🇺🇸 San Diego | 558 | 2018 |
| 87 | [Careerminds](https://www.tamtam.ai/c/careerminds) (careerminds.com)<br>This company offers outplacement, executive coaching, and career development services globally in multiple languages using technology and personalized coaching | Human Resources Services | 🇺🇸 Wilmington | 552 | 2007 |
| 88 | [#ONO (Open to New Opportunities)](https://www.tamtam.ai/c/ono-open-to-new-opportunities)<br>Provides guidance on leveraging LinkedIn's #ONO and #OpenToWork features to increase search visibility and attract recruiters, emphasizing value demonstration and proper application for optimal results. | Human Resources Services | 🇺🇸 | 549 | 2017 |
| 89 | [Altair Global](https://www.tamtam.ai/c/altair-global) (altairglobal.com)<br>Global relocation management company with sophisticated technology, delivering exceptional mobility experiences worldwide through full-service assignment and relocation services since 1989 | Human Resources Services | 🇺🇸 Frisco | 549 | 1989 |
| 90 | [All jobs](https://www.tamtam.ai/c/all-jobs) (alljobs.ai)<br>An AI-driven recruitment marketing platform that efficiently publishes job postings to Google for Jobs and attracts high-quality candidates quickly | Human Resources Services | 🇺🇸 Westford | 549 |  |
| 91 | [SSP](https://www.tamtam.ai/c/ssp-san-jose) (semistaffing.com)<br>SSP is a dedicated firm specializing in sourcing top talent for industry leaders, both domestically and internationally, driving client growth | Human Resources Services | 🇺🇸 San Jose | 537 | 2011 |
| 92 | [Jewelry and Candles](https://www.tamtam.ai/c/jewelry-and-candles) (jewelryincandles.com)<br>This company offers candles with hidden jewelry inside, made from 100% natural soy wax and premium fragrances for a unique scent experience | Human Resources Services | 🇺🇸 Alanta | 534 | 2008 |
| 93 | [Group Management Services, Inc.](https://www.tamtam.ai/c/group-management-services-inc) (groupmgmt.com)<br>A comprehensive HR solutions provider offering payroll, HR, risk management, and benefits services to businesses across the US, focusing on compliance and protection | Human Resources Services | 🇺🇸 Richfield | 531 | 1996 |
| 94 | [شركة معين للموارد البشرية \| Mueen Human Resources Company](https://www.tamtam.ai/c/mueen-human-resources-company) (mueen.com.sa)<br>A Saudi HR company providing recruitment services in various fields, emphasizing on professionalism, training, and customer satisfaction to meet labor market needs | Human Resources Services | 🇺🇸 | 531 | 2015 |
| 95 | [Wellness Coach](https://www.tamtam.ai/c/wellness-coach) (wellnesscoach.live)<br>A digital wellness platform offering personalized preventative care, coaching sessions, diverse content, group sessions, progress tracking tools, and AI solutions for healthier lifestyles | Human Resources Services | 🇺🇸 Las Vegas | 514 | 2020 |
| 96 | [Actively Seeking Employment.](https://www.tamtam.ai/c/actively-seeking-employment-7602469) (medium.com)<br>A company seeking employment opportunities, offering to share resumes upon request Ready to hear from potential employers Thank you | Human Resources Services | 🇺🇸 Www | 511 | 2016 |
| 97 | [TCWGlobal](https://www.tamtam.ai/c/tcwglobal) (tcwglobal.com)<br>Global provider of solutions for expanding national and global teams, specializing in contingent workforce management, compliance, staffing, and international employment services | Human Resources Services | 🇺🇸 San Diego | 501 | 2010 |
| 98 | [ManpowerGroup Colombia](https://www.tamtam.ai/c/manpowergroup-colombia) (manpowergroupcolombia.co)<br>Global leader in innovative human capital solutions with over 70 years of experience Providing dignified employment opportunities, training millions of individuals, and advising on labor market policies | Human Resources Services | 🇺🇸 Milwaukee | 476 | 1976 |
| 99 | [Segal Consulting](https://www.tamtam.ai/c/segal-consulting) (segalco.com)<br>A trusted consulting firm with actuarial roots, offering guidance in health benefits, HR, technology, investments, and more for organizations impacting society | Human Resources Services | 🇺🇸 New York | 465 | 1939 |
| 100 | [Engage PEO](https://www.tamtam.ai/c/engage-peo) (engagepeo.com)<br>A national HR solutions provider offering expert services, insurance products, payroll technology, risk management, and advanced technology for small to medium-sized businesses | Human Resources Services | 🇺🇸 Fort Lauderdale | 438 | 2011 |

## 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 13, 2026.

## More company lists in the United States

- [The largest companies in the United States](https://www.tamtam.ai/l/largest-companies-united-states) (104,977)
- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,192)
- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Professional services firms in the United States](https://www.tamtam.ai/l/professional-services-firms-united-states) (7,079)
- [Retail chains in the United States](https://www.tamtam.ai/l/retail-chains-united-states) (6,980)
- [Financial services firms in the United States](https://www.tamtam.ai/l/financial-services-firms-united-states) (6,867)
- [Companies with in-house R&D in the United States](https://www.tamtam.ai/l/r-and-d-companies-united-states) (6,794)
- [IT Services and IT Consulting companies in the United States](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-states) (6,695)
- [SaaS companies in the United States](https://www.tamtam.ai/l/saas-companies-united-states) (6,410)
- [IT services companies in the United States](https://www.tamtam.ai/l/it-services-companies-united-states) (5,818)
- [Healthcare providers in the United States](https://www.tamtam.ai/l/healthcare-providers-united-states) (5,810)
- [Critical infrastructure operators in the United States](https://www.tamtam.ai/l/critical-infrastructure-operators-united-states) (5,801)
- [Hospitals and Health Care companies in the United States](https://www.tamtam.ai/l/hospitals-and-health-care-companies-united-states) (5,573)
- [Hardware manufacturers in the United States](https://www.tamtam.ai/l/hardware-companies-united-states) (5,344)
- [Software Development companies in the United States](https://www.tamtam.ai/l/software-development-companies-united-states) (5,311)
- [Financial Services companies in the United States](https://www.tamtam.ai/l/financial-services-companies-united-states) (5,014)
- [Companies with a mobile app in the United States](https://www.tamtam.ai/l/companies-with-mobile-app-united-states) (4,663)
- [Consulting firms in the United States](https://www.tamtam.ai/l/consulting-firms-united-states) (4,382)
- [AI companies in the United States](https://www.tamtam.ai/l/ai-companies-united-states) (4,246)
- [Public sector organisations in the United States](https://www.tamtam.ai/l/public-sector-organisations-united-states) (4,151)
- [Subscription businesses in the United States](https://www.tamtam.ai/l/subscription-businesses-united-states) (3,923)
- [Real Estate companies in the United States](https://www.tamtam.ai/l/real-estate-companies-united-states) (3,808)
- [Higher Education companies in the United States](https://www.tamtam.ai/l/higher-education-companies-united-states) (3,470)
- [Construction companies in the United States](https://www.tamtam.ai/l/construction-companies-united-states) (3,271)

## The same list elsewhere in United States

- [Human Resources Services companies in California](https://www.tamtam.ai/l/human-resources-services-companies-california) (40)
- [Human Resources Services companies in New York State](https://www.tamtam.ai/l/human-resources-services-companies-new-york-state) (26)
- [Human Resources Services companies in Texas](https://www.tamtam.ai/l/human-resources-services-companies-texas) (26)

## The same list elsewhere

- [Human Resources Services companies in the world](https://www.tamtam.ai/l/human-resources-services-companies-in-the-world) (2,224)
- [Human Resources Services companies in North America](https://www.tamtam.ai/l/human-resources-services-companies-in-north-america) (361)

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Source: https://www.tamtam.ai/l/human-resources-services-companies-united-states