Clean Harbors competitors and alternatives
As of Nov 12, 2026, Alion lists 10 companies most like Clean Harbors: WM, Enviri Corporation, Arcwood Environmental, Waste Connections, Adler and Allan, IDEXX Laboratories, Veolia, Republic Services, Miller Environmental Group and Maryland Environmental Service.
- Clean Harbors itself has 1,168 open roles on Alion.
- Of them, Veolia is hiring the most, with 1,480 open roles.
Clean Harbors and its competitors compared
Open roles are the postings Alion lists today; their change is shown only for career sites that state posting dates. Funding is the venture money on record. A dash means Alion holds no figure.
| Company | Open roles | Last round | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|---|
Clean Harbors
This company
|
1,168 | – | 5000+ | Norwell, United States | HPC, Windows, SQL | United States, Canada, India +1 more |
WM
In common: Waste Management, Environmental Science · JavaScript, SQL, Copilot · headquarters in United States |
898 | – | 5000+ | Houston, United States | Microsoft Excel, Power BI, SQL | United States, Canada, India +4 more |
Enviri Corporation
In common: Waste Management · JavaScript, TypeScript, SQL · headquarters in United States |
77 | – | 5000+ | Philadelphia, United States | Windows, Microsoft Excel, Power BI | United States, India, Brazil +5 more |
Arcwood Environmental
In common: Waste Management, Environmental Science · Azure · headquarters in United States |
97 | – | 1001-5000 | Indianapolis, United States | Azure, Power BI, Statistical Process Control | United States, United Kingdom |
Waste Connections
In common: Waste Management · JavaScript, TypeScript, SQL · headquarters in United States |
554 | – | 5000+ | The Woodlands, United States | Microsoft Excel, AWS, CI/CD | United States, Canada |
Adler and Allan
In common: Environmental Science, Waste Management · JavaScript, TypeScript, SQL |
155 | Venture round2024 | 1001-5000 | Harrogate, United Kingdom | AutoCAD, Microsoft Excel, Power BI | United Kingdom, United States, Ireland |
IDEXX Laboratories
In common: Environmental Science · JavaScript, TypeScript, SQL · headquarters in United States |
178 | – | 5000+ | Westbrook, United States | Computer Use, AWS, Python | United States, Netherlands, New Zealand +19 more |
Veolia
In common: Waste Management · JavaScript, TypeScript, SQL |
1,480 | – | 5000+ | Aubervilliers, France | AutoCAD, DALL-E, SQL | France, United States, Spain +45 more |
Republic Services
In common: Waste Management · JavaScript, TypeScript, SQL · headquarters in United States |
21 | – | 5000+ | Phoenix, United States | Microsoft Excel, AWS, SQL | United States |
Miller Environmental Group
In common: Waste Management, Environmental Science · headquarters in United States |
29 | – | 501-1000 | Raleigh, United States | – | United States |
Maryland Environmental Service
In common: Waste Management, Environmental Science · headquarters in United States |
21 | – | – | Baltimore, United States | – | United States |
How the list is made
The list comes from Alion's similar-companies engine, the same one AI agents query through the Alion MCP server. A company ranks higher when it shares more of Clean Harbors's industry segments and is less spread over others, when its job postings name the same technologies, when it is headquartered in the same country and when its size is close. The list is rebuilt every week.
How to cite this page
These figures are published under a free licence. You may reuse them, including commercially, as long as you credit Alion and link back to this page.
Alion, "Clean Harbors competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 12, 2026. https://alion.io/company/cleanharbors-com/competitors