# Companies using SWMM

We found 3,598 companies that use SWMM. 1,119 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts held steady in the three months to August 2026; 2,113 job posts named it from October 2025 to August 2026. Water Resources Engineer is the role that names it most often.

Data as of November 9, 2026. Source: Sumble.

## Which companies name SWMM in the most job posts?

AECOM, WSP and Kimley-Horn mention SWMM in the most job posts. All five companies are in Professional Services.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [AECOM](https://sumble.com/orgs/aecom) | 585 | 71 | "Advanced proficiency in CAD software (AutoCAD or equivalent) and hydraulic modeling software (HEC-HMS, SWMM, or similar)" (Senior Engineer - Stormwater, Oct 21, 2026) |
| [WSP](https://sumble.com/orgs/wsp) | 454 | 43 | "Hydrologic and hydraulic modeling (HEC-RAS, ICPR/StormWise, SWMM)" (Deputy Project Manager – Water Resources / Site Civil Engineer, Oct 22, 2026) |
| [Kimley-Horn](https://sumble.com/orgs/kimley-horn-and-associates) | 369 | 24 | "Experience with Microstation/OpenRoads, AutoCAD, ArcGIS, HydroCAD, SWMM, HEC-RAS, HEC-HMS, StormCAD, and other related hydrologic/hydraulic analysis and roadway design software" (Water Resources Engineer, Nov 7, 2026) |
| [Geosyntec Consultants](https://sumble.com/orgs/geosyntec-consultants) | 340 | 17 | "Experience with hydrologic/hydraulic modeling and GIS tools such as EPA-SWMM, HydroCAD, HEC-HMS, HEC-RAS, and/or ArcGIS." (Experienced Civil / Water Resources Engineer, Nov 1, 2026) |
| [CDM Smith](https://sumble.com/orgs/cdm-smith) | 301 | 29 | "Use tools such as ArcGIS, HEC-RAS, SWMM, CADD, Excel, and other engineering software to support project design and analysis." (Junior Environmental Engineer - Water Services, Nov 7, 2026) |

## Is hiring for SWMM growing?

Since late 2025, job posts mentioning SWMM went from 0.97 to 1.1 in every 10,000 job posts, and the last three months were flat.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 136 | 1,413,673 | 0.96 |
| Nov 2025 | 164 | 1,822,119 | 0.90 |
| Dec 2025 | 136 | 1,236,103 | 1.1 |
| Jan 2026 | 221 | 1,828,002 | 1.2 |
| Feb 2026 | 227 | 1,856,647 | 1.2 |
| Mar 2026 | 193 | 1,850,711 | 1.0 |
| Apr 2026 | 213 | 1,728,886 | 1.2 |
| May 2026 | 200 | 1,821,509 | 1.1 |
| Jun 2026 | 208 | 1,909,496 | 1.1 |
| Jul 2026 | 208 | 1,815,180 | 1.1 |
| Aug 2026 | 207 | 1,835,698 | 1.1 |

## How many companies named SWMM in a job post for the first time in recent months?

In the three months to August 2026, 58 companies posted about SWMM for the first time. From March to May, 70 did. The 58 from June to August are 5.2% of all 1,119 companies whose job posts name it.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 70 |
| June to August 2026 | 58 |
| October 2025 to August 2026 | 208 |

Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.

## How do we know which companies use SWMM?

Most of these companies come from employees' profiles: 69% have no job post naming SWMM. 1,119 name it in their own job posts.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name SWMM | 1,119 | 31% |
| Employees' profiles list SWMM | 2,479 | 69% |

## What size are the companies that use SWMM?

45% of SWMM users are companies with 50 to 999 employees, the largest size group. The second-largest group is companies with fewer than 50 employees, at 25%.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 25% | 22% |
| 50 to 999 | 45% | 38% |
| 1,000 to 5,000 | 17% | 17% |
| Over 5,000 | 13% | 23% |

## Where are SWMM companies based?

Italy is 5.3 times as common among SWMM companies as on the typical tech page, at 7.8%. The United States leads overall with 38%. India is less common than usual, at 3% against 6.9% on the typical tech page.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 1,306 | 38% | 43% |
| Spain | 281 | 8.1% | 1.8% |
| Canada | 277 | 8% | 3.6% |
| Italy | 269 | 7.8% | 1.5% |
| France | 142 | 4.1% | 4.6% |
| India | 103 | 3% | 6.9% |

## Which teams work with SWMM?

At 67 companies, the team named in SWMM job posts is water resources, at least twice the next. Water and civil engineering teams come next, at 21 and 18 companies.

| Team | Companies |
|---|---:|
| Water resources | 67 |
| Water | 21 |
| Civil engineering | 18 |
| Engineering | 17 |
| Transportation | 16 |
| Infrastructure | 13 |

## Which roles mention SWMM most?

Water Resources Engineer roles make up 42% of the job posts that name SWMM. The top four roles cover 69% of these job posts.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Water Resources Engineer | 42% | 882 | 234 | 256 |
| Civil Engineer | 14% | 300 | 82 | 79 |
| Skilled Trades | 7.1% | 149 | 46 | 44 |
| Program Manager | 5.8% | 123 | 42 | 30 |
| Environmental Engineer | 3.2% | 68 | 14 | 21 |
| Engineer | 3.1% | 66 | 22 | 12 |

## Which companies started naming SWMM in job posts recently?

Between April and August 2026, 51 companies with 50 or more employees first named SWMM in a job post, 9 of them with more than 5,000 employees.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [AAA Life Insurance Company](https://sumble.com/orgs/aaa-life-insurance) | 5 |
| Commercial | [IBTS - Institute for Building Technology and Safety](https://sumble.com/orgs/institute-for-building-technology-and-safety-ibts) | 5 |
| Commercial | [gbc engineers](https://sumble.com/orgs/gbcengineers) | 5 |
| Commercial | [Egis in ANZ](https://sumble.com/orgs/egis-anz) | 3 |
| Commercial | [Assystem in India](https://sumble.com/orgs/assystem-stup) | 3 |
| Mid-market | [GFT](https://sumble.com/orgs/gft-inc-com) | 1 |
| Mid-market | [UM6P - University Mohammed VI Polytechnic](https://sumble.com/orgs/um6p-france) | 1 |
| Mid-market | [IPS-Mehtalia Pvt. Ltd](https://sumble.com/orgs/ips-mehtalia) | 1 |
| Mid-market | [Zutari](https://sumble.com/orgs/zutari) | 1 |
| Mid-market | [Metro Vancouver](https://sumble.com/orgs/metro-vancouver) | 1 |
| Enterprise | [US Army Corps of Engineers](https://sumble.com/orgs/army-corps-of-engineers) | 2 |
| Enterprise | [Technip Energies](https://sumble.com/orgs/technip-energies) | 2 |
| Enterprise | [City of Calgary](https://sumble.com/orgs/city-of-calgary) | 2 |
| Enterprise | [American Electric Power](https://sumble.com/orgs/american-electric-power) | 2 |
| Enterprise | [Larsen & Toubro](https://sumble.com/orgs/larsen-and-toubro-l&t) | 1 |

Companies that named SWMM in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.

## What else do SWMM companies use?

Compared with companies of the same size, SWMM companies stand out for using XPSWMM and TR-55. SRH-2D comes third, 185 times as common as usual, at 6.8%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| XPSWMM | 119 | 13% | 0.07% | 195 times |
| TR-55 | 63 | 6.8% | 0.04% | 185 times |
| SRH-2D | 63 | 6.8% | 0.04% | 185 times |
| StormCAD | 174 | 19% | 0.11% | 173 times |
| FLO-2D | 68 | 7.4% | 0.04% | 167 times |
| SewerCAD | 75 | 8.1% | 0.05% | 161 times |
| HEC-HMS | 493 | 53% | 0.33% | 161 times |
| PondPack | 54 | 5.9% | 0.04% | 155 times |

Shares are out of the 923 companies whose job posts name SWMM, not counting firms whose job posts name almost every technology.

## About this data

Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.

Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.

Sumble has a free plan, and the same data is available through its API and MCP server.

A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.

Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.