> 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/541620/ # NAICS code 541620: Environmental Consulting Services The companies classified under NAICS 541620, 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 541620 is the code for Environmental Consulting Services, in sector 54: Professional, Scientific, and Technical Services. The companies counted under it are mostly very small: 70% have 50 or fewer employees, and 92% are headquartered in the United States. ## What is NAICS 541620? NAICS 541620 is the code for Environmental Consulting Services. It belongs to sector 54: Professional, Scientific, and Technical 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 8748, Business consulting services, in the older SIC system (91%). - 70% of the companies counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. - The largest group is headquartered in the United States (92%). Within the US, California is the biggest state (15%). - Most were founded in the 2000s (32%), then the 1990s (31%). **Figure: How NAICS 541620 is built.** The code 541620 split into its parts: sector 54, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 541620. Each digit narrows the category.* ## Which companies are classified under NAICS 541620? The biggest by headcount range include Triumvirate Environmental, Montrose Environmental Group, Safety-Kleen, Weston Solutions and Ebi Consulting. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | Triumvirate Environmental | Somerville, MA | 1,001 to 5,000 | | Montrose Environmental Group | Little Rock, AR | 1,001 to 5,000 | | Safety-Kleen | Plano, TX | 1,001 to 5,000 | | Weston Solutions | West Chester, PA | 1,001 to 5,000 | | Ebi Consulting | Burlington, MA | 501 to 1,000 | | Resource Environmental Solutions | Bellaire, TX | 501 to 1,000 | | V2solutions | Santa Clara, CA | 501 to 1,000 | | Rincon Consultants | Ventura, CA | 501 to 1,000 | | Liquid Environmental Solutions | Irving, TX | 501 to 1,000 | | Anchor Qea | Seattle, WA | 501 to 1,000 | | Entact | Westmont, IL | 501 to 1,000 | | Moran Environmental Recovery | Randolph, MA | 501 to 1,000 | | Energy Saving Trust | London, United Kingdom | 201 to 500 | | Hagerty Consulting | Evanston, IL | 201 to 500 | | Anaergia | Burlington, Canada | 201 to 500 | | Triton Environmental Consultants | Vancouver, Canada | 201 to 500 | | Qm Environmental | Toronto, Canada | 201 to 500 | | Golden Gate National Parks Conservancy | San Francisco, CA | 201 to 500 | | Search | Orlando, FL | 201 to 500 | | All4 | Kimberton, PA | 201 to 500 | | Gsi Environmental | Houston, TX | 201 to 500 | | Miller Environmental Group | Calverton, NY | 201 to 500 | | Ehs Support | Pittsburgh, PA | 201 to 500 | | Nova Group, Gbc | St. Louis Park, MN | 201 to 500 | | Envita Solutions | Indianapolis, IN | 201 to 500 | 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 541620 companies based? The largest groups are headquartered in the United States (92%), Canada (4%) and the United Kingdom (3%). **Figure: Where companies in NAICS 541620 are based.** Bars for the share of counted companies in NAICS 541620 headquartered in each country: United States 92%, Canada 4%, United Kingdom 3%. *Share of counted companies in NAICS 541620 by headquarters country.* Within the United States, California (15%), Texas (12%) and New York (6%) lead. **Figure: US headquarters of companies in NAICS 541620, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 541620 headquartered in each state. The largest are California 15%, Texas 12%, New York 6%. *Share of counted US companies in NAICS 541620 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 541620? 70% of them have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 541620.** Seven columns for the share of counted companies in NAICS 541620 in each employee range: 11 to 50 70%, 51 to 200 21%, 201 to 500 5%, 501 to 1,000 2%, 1,001 to 5,000 1%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted companies in NAICS 541620 in each employee range.* ## How old are NAICS 541620 companies? Most were founded in the 2000s (32%), then the 1990s (31%). **Figure: When companies in NAICS 541620 were founded.** Eight columns for the share of counted companies in NAICS 541620 founded in each era: Before 1960 2%, 1960s 1%, 1970s 4%, 1980s 14%, 1990s 31%, 2000s 32%, 2010s 14%, 2020s 2%. *Share of counted companies in NAICS 541620 by the era they were founded in, for the ones that list a founding year.* ## How NAICS 541620 compares - 70% of companies in NAICS 541620 have 50 or fewer employees, against 60% across all NAICS codes on this site. - 16% were founded in 2010 or later, against 30% across all NAICS codes on this site. - Texas holds 12% of the US companies here, against 8% across all NAICS codes on this site. ## How do NAICS 541620 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 Environmental Services (83%), Business Consulting and Services (6%) and Construction (4%). **Figure: How companies in NAICS 541620 describe themselves.** Bars for the share of counted companies in NAICS 541620 that give each industry on their public profile: Environmental Services 83%, Business Consulting and Services 6%, Construction 4%, Oil and Gas 4%. *Share of counted companies in NAICS 541620 by the industry they list on their public profile.* ## NAICS 541620 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 8748 | Business consulting services | 91% | | SIC 8999 | Services-miscellaneous | 8% | ## 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 541620 companies? The people to talk to are usually partners, practice leaders and heads of operations. 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 541620 (Environmental Consulting Services) ``` ### 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 partners, practice leaders and heads of operations at companies with NAICS code 541620, 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 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/) Others in sector 54: [NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/)[NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/)[NAICS 541110: Offices of Lawyers](https://enrich.chat/naics/541110/)[NAICS 541810: Advertising Agencies](https://enrich.chat/naics/541810/)[NAICS 541820: Public Relations Agencies](https://enrich.chat/naics/541820/)[NAICS 541310: Architectural Services](https://enrich.chat/naics/541310/)[NAICS 541219: Other Accounting Services](https://enrich.chat/naics/541219/)[NAICS 541320: Landscape Architectural Services](https://enrich.chat/naics/541320/) ## Frequently asked questions ### What is NAICS code 541620? NAICS 541620 is the code for Environmental Consulting Services, in sector 54: Professional, Scientific, and Technical Services. ### What is the SIC code for NAICS 541620 (Environmental Consulting Services)? 91% of the companies counted carry SIC 8748 (Business consulting services), but the two systems do not map one to one. ### Which companies are classified under NAICS 541620? The biggest by headcount range include Triumvirate Environmental, Montrose Environmental Group, Safety-Kleen, Weston Solutions and Ebi Consulting. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 541620 companies based? The largest groups are headquartered in the United States (92%), Canada (4%) and the United Kingdom (3%). ### How big are the companies in NAICS 541620? 70% have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. ### Is NAICS 541620 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 8748. ## Try this prompt Find the people at NAICS 541620 companies ```text Use www.enrich.chat to find the partners, practice leaders and heads of operations at companies with NAICS code 541620, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 541613](https://enrich.chat/naics/541613/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)