> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/561330/ # NAICS code 561330: Professional Employer Organizations The companies classified under NAICS 561330, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 561330 is the code for Professional Employer Organizations, in sector 56: Administrative and Support and Waste Management and Remediation Services. The companies counted under it are mostly small: 80% have 200 or fewer employees, and 52% are headquartered in the United States. ## What is NAICS 561330? NAICS 561330 is the code for Professional Employer Organizations. It belongs to sector 56: Administrative and Support and Waste Management and Remediation Services. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 7363, Help supply services, in the older SIC system (74%). NAICS is a North American system, so companies outside the US, Canada and Mexico are placed in it by classification. - 38% of the companies counted have 50 or fewer employees, and the middle one is in the 51 to 200 range. - The largest group is headquartered in the United States (52%). - Most were founded in the 2000s (37%), then the 2010s (34%). **Figure: How NAICS 561330 is built.** The code 561330 split into its parts: sector 56, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 561330. Each digit narrows the category.* ## Which companies are classified under NAICS 561330? The biggest by headcount range include Brillient, Asap Venezuela, Manhattan Data, Envision and The Structures. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | Brillient | Reston, VA | 1,001 to 5,000 | | Asap Venezuela | Caracas, Venezuela | 501 to 1,000 | | Manhattan Data | Laguna Hills, CA | 501 to 1,000 | | Envision | St. Louis, MO | 201 to 500 | | The Structures | Seal Beach, CA | 201 to 500 | | Proservice Hawaii | Honolulu, HI | 201 to 500 | | Arrow Strategies | Royal Oak, MI | 201 to 500 | | Flight Services International | Houston, TX | 201 to 500 | | Acerta Computación Aplicada, S.A. De C.V | Federal, Mexico | 201 to 500 | | People Premier | Clearwater, FL | 201 to 500 | | Resolution Technologies | Atlanta, GA | 51 to 200 | | Source Technology | London, United Kingdom | 51 to 200 | | Gotfriends | Ramat Gan, Israel | 51 to 200 | | Virtual Tech Gurus | Dallas, TX | 51 to 200 | | Techtrueup | Naples, FL | 51 to 200 | | Extendime Software Solutions | Old Bridge, NJ | 51 to 200 | | Helpside | Lindon, UT | 51 to 200 | | Pt. Global Sarana Sukses | Jakarta, Indonesia | 51 to 200 | | Altron | Chantilly, VA | 51 to 200 | | Sds Resources | Birmingham, AL | 51 to 200 | | Qualityminds Sp. Z O.O | Warszawa, Poland | 51 to 200 | | Anbosa Personaldienstleistungen | Berlin, Germany | 51 to 200 | | Dpl Deutsche Personalleasing | Herford, Germany | 51 to 200 | | Connecting People | Denver, CO | 11 to 50 | | Hr Strategy | Ciudad Autonoma De Buenos Aires, Argentina | 11 to 50 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are NAICS 561330 companies based? The largest groups are headquartered in the United States (52%), Germany (15%) and Austria (11%). **Figure: Where companies in NAICS 561330 are based.** Bars for the share of counted companies in NAICS 561330 headquartered in each country: United States 52%, Germany 15%, Austria 11%. *Share of counted companies in NAICS 561330 by headquarters country.* ## How big are the companies counted for NAICS 561330? 38% of them have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 561330.** Seven columns for the share of counted companies in NAICS 561330 in each employee range: 11 to 50 38%, 51 to 200 42%, 201 to 500 14%, 501 to 1,000 4%, 1,001 to 5,000 2%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted companies in NAICS 561330 in each employee range.* ## How NAICS 561330 compares - 38% of companies in NAICS 561330 have 50 or fewer employees, against 60% across all NAICS codes on this site. ## How do NAICS 561330 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Staffing and Recruiting (32%), IT Services and IT Consulting (26%) and Human Resources Services (22%). **Figure: How companies in NAICS 561330 describe themselves.** Bars for the share of counted companies in NAICS 561330 that give each industry on their public profile: Staffing and Recruiting 32%, IT Services and IT Consulting 26%, Human Resources Services 22%, Business Consulting and Services 4%, Civil Engineering 4%, Human Resources 4%. *Share of counted companies in NAICS 561330 by the industry they list on their public profile.* ## NAICS 561330 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | [SIC 7363](https://enrich.chat/naics/561320/) | Help supply services | 74% | | [SIC 7379](https://enrich.chat/naics/541512/) | Computer related services | 14% | | [SIC 1731](https://enrich.chat/naics/238210/) | Electrical contractor | 2% | | SIC 1795 | Wrecking and demolition contractor | 2% | | [SIC 7372](https://enrich.chat/naics/513210/) | Prepackaged software services | 2% | | [SIC 7373](https://enrich.chat/sic/7373/) | Computer systems design | 2% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 561330 companies? The people to talk to are usually operations, HR and finance leaders. You can build the list from this code in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 561330 (Professional Employer Organizations) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, HR and finance leaders at companies with NAICS code 561330, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Codes next to it: [NAICS 561311: Employment Placement Agencies](https://enrich.chat/naics/561311/)[NAICS 561312: Executive Search Services](https://enrich.chat/naics/561312/)[NAICS 561320: Temporary Help Services](https://enrich.chat/naics/561320/) Others in sector 56: [NAICS 561510: Travel Agencies](https://enrich.chat/naics/561510/)[NAICS 561730: Landscaping Services](https://enrich.chat/naics/561730/)[NAICS 561621: Security Systems Services](https://enrich.chat/naics/561621/)[NAICS 561720: Janitorial Services](https://enrich.chat/naics/561720/)[NAICS 561710: Exterminating and Pest Control Services](https://enrich.chat/naics/561710/)[NAICS 561612: Security Guards and Patrol Services](https://enrich.chat/naics/561612/)[NAICS 561520: Tour Operators](https://enrich.chat/naics/561520/)[NAICS 562920: Materials Recovery Facilities](https://enrich.chat/naics/562920/) ## Frequently asked questions ### What is NAICS code 561330? NAICS 561330 is the code for Professional Employer Organizations, in sector 56: Administrative and Support and Waste Management and Remediation Services. ### What is the SIC code for NAICS 561330 (Professional Employer Organizations)? 74% of the companies counted carry SIC 7363 (Help supply services), but the two systems do not map one to one. ### Which companies are classified under NAICS 561330? The biggest by headcount range include Brillient, Asap Venezuela, Manhattan Data, Envision and The Structures. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 561330 companies based? The largest groups are headquartered in the United States (52%), Germany (15%) and Austria (11%). ### How big are the companies in NAICS 561330? 38% have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. ### Is NAICS 561330 the same as a SIC code? No. NAICS replaced SIC as the U.S. federal standard in 1997, and the two do not map one to one. The SIC code seen most among these companies is 7363. ## Try this prompt Find the people at NAICS 561330 companies ```text Use www.enrich.chat to find the operations, HR and finance leaders at companies with NAICS code 561330, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 561311](https://enrich.chat/naics/561311/) - [NAICS 561312](https://enrich.chat/naics/561312/) - [NAICS 561320](https://enrich.chat/naics/561320/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)