HGL competitors and alternatives
As of Nov 15, 2026, Alion lists 10 companies most like HGL: SWCA Environmental Consultants, Apex Companies, GZA, True Environmental, Environmental Science Associates, Anchor QEA, EHS Support, GreenPath, Geosyntec Consultants and Verdantas.
- HGL itself has 25 open roles on Alion.
- Of them, Apex Companies is hiring the most, with 153 open roles.
HGL 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 | Change | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|---|
HGL
This company
|
25 | – | – | Lakewood, United States | Copilot, ChatGPT, Claude | United States |
SWCA Environmental Consultants
In common: Environmental Science, Engineering Services · SQL, Copilot, Function Calling · headquarters in United States |
49 | – | 1001-5000 | Phoenix, United States | AutoCAD, Python, SQL | United States |
Apex Companies
In common: Environmental Science, Engineering Services · SQL, Copilot, AutoCAD · headquarters in United States |
153 | – | 1001-5000 | Rockville, United States | AutoCAD, Microsoft Excel, Time Series | United States, Italy, Canada |
GZA
In common: Environmental Science, Engineering Services · SQL, Copilot, AutoCAD · headquarters in United States |
41 | – | 501-1000 | Norwood, United States | AutoCAD, Python, SQL | United States |
| True Environmental In common: Environmental Science, Engineering Services · SQL, AutoCAD, Windows · headquarters in United States | 47 | -2%since Oct 12, 2026 | 201-500 | Denver, United States | Python, AutoCAD, AWS | United States, Canada, Brazil +1 more |
| Environmental Science Associates In common: Environmental Science, Engineering Services · Copilot, AutoCAD, Microsoft Excel · headquarters in United States | 21 | 0%since Oct 12, 2026 | 51-200 | San Francisco, United States | AutoCAD, MATLAB, SIEM | United States |
| Anchor QEA In common: Environmental Science, Engineering Services · SQL, AutoCAD, Microsoft Excel · headquarters in United States | 19 | – | 201-500 | Seattle, United States | AutoCAD, Wi-Fi, Power BI | United States |
EHS Support
In common: Environmental Science, Engineering Services · SQL, AutoCAD, Microsoft Excel · headquarters in United States |
15 | – | 51-200 | Pittsburgh, United States | Microsoft Excel, Power BI, AutoCAD | United States, Australia |
GreenPath
In common: Environmental Science, Engineering Services · SQL, Copilot, Windows · headquarters in United States |
2 | – | 201-500 | Farmington Hills, United States | Windows, Azure, Azure DevOps | United States |
Geosyntec Consultants
In common: Environmental Science, Engineering Services · SQL, Copilot, AutoCAD · headquarters in United States |
141 | – | 1001-5000 | Columbia, United States | AutoCAD, Python, Windows | United States, Canada |
Verdantas
In common: Environmental Science, Engineering Services · SQL, Copilot, AutoCAD · headquarters in United States |
123 | – | – | Columbus, United States | AutoCAD, Microsoft Excel, SQL | United States, United Kingdom, India |
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 HGL'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, "HGL competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 15, 2026. https://alion.io/company/hgl-com/competitors