# Companies using TR-55

482 companies use TR-55, based on their job posts and their employees' public profiles. 176 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 TR-55 in the most job posts?

WSP, Kiewit and The Davey Tree Expert Company are among the companies with the most job posts naming TR-55. Sargent & Lundy is the newest of the five companies in the table, with its first job post naming it in July 2023.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [WSP](https://sumble.com/orgs/wsp) | 143 | 16 | "…water analysis, hydraulic and hydrologic methodologies and models (HEC-HMS, HEC-RAS, TR-55, SITES, HydroCAD, PCSWMM, and related models) and with GIS and CAD software." (Senior Water Resources Engineer, Jul 22, 2026) |
| [Kiewit](https://sumble.com/orgs/kiewit) | 70 | 1 | "Software experience includes: HEC-HMS, SWMM, TR-55, SBUH and HSPF method programs" (Senior Water Resources Engineer - Kiewit Infrastructure Engineers, Nov 7, 2026) |
| [The Davey Tree Expert Company](https://sumble.com/orgs/davey-tree) | 64 | 0 | "Experience with AutoCAD, AutoCAD Civil 3D, SWMM, HEC-HMS, HEC-RAS, and TR-55" (Water Resources Engineer, Oct 24, 2026) |
| [Sargent & Lundy](https://sumble.com/orgs/sargent-&-lundy) | 57 | 1 | "…HEC-HMS, HEC-RAS (1D, 2D), RAS Mapper, QGIS, Global Mapper, TR-55, GIS software, Civil3D, and AutoCAD." (Water Resources Engineer 3 - Energy & Industrial, Mar 12, 2026) |
| [Resource Environmental Solutions LLC](https://sumble.com/orgs/resource-environmental-solutions) | 51 | 0 | "Your day may include preparing grading and drainage designs in AutoCAD Civil 3D, modeling flows using HEC-RAS or TR-55, or compiling plan sets for regulatory review." (Water Resources Engineer II, Apr 28, 2026) |

## Is hiring for TR-55 growing?

0.08 in every 10,000 job posts named TR-55 from June to August 2026, against 0.11 from March to May. These are small numbers of job posts, so a few companies can move them.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 12 | 1,413,673 | 0.08 |
| Nov 2025 | 16 | 1,822,119 | 0.09 |
| Dec 2025 | 8 | 1,236,103 | 0.06 |
| Jan 2026 | 17 | 1,828,002 | 0.09 |
| Feb 2026 | 17 | 1,856,647 | 0.09 |
| Mar 2026 | 28 | 1,850,711 | 0.15 |
| Apr 2026 | 15 | 1,728,886 | 0.09 |
| May 2026 | 19 | 1,821,509 | 0.10 |
| Jun 2026 | 15 | 1,909,496 | 0.08 |
| Jul 2026 | 18 | 1,815,180 | 0.10 |
| Aug 2026 | 11 | 1,835,698 | 0.06 |

## How many companies named TR-55 in a job post for the first time in recent months?

From June to August 2026, 5 companies posted their first job naming TR-55; 4 did from March to May. Over the 11 months from October 2025, 15 companies posted their first job naming it.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 4 |
| June to August 2026 | 5 |
| October 2025 to August 2026 | 15 |

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 TR-55?

164 companies name TR-55 in their own job posts. The other 318 show up because employees list it on their profiles. 45 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name TR-55 | 164 | 34% |
| Employees' profiles list TR-55 | 318 | 66% |

## What size are the companies that use TR-55?

By size, the biggest group of TR-55 users is companies with 50 to 999 employees, at 44%. 109 of its companies have fewer than 50 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 23% | 22% |
| 50 to 999 | 44% | 38% |
| 1,000 to 5,000 | 19% | 17% |
| Over 5,000 | 14% | 23% |

## Where are TR-55 companies based?

More than half of TR-55 companies are in the United States (92%). Its companies are based in 17 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 424 | 92% | 43% |
| Canada | 10 | 2.2% | 3.6% |
| United Kingdom | 6 | 1.3% | 6.4% |
| Australia | 4 | 0.86% | 2.2% |
| India | 4 | 0.86% | 6.9% |
| United Arab Emirates | 2 | 0.43% | 1% |

## Which teams work with TR-55?

No team dominates TR-55 job posts. Water resources comes first, at 6 companies.

| Team | Companies |
|---|---:|
| Water resources | 6 |
| Transportation | 5 |
| Civil engineering | 4 |
| Engineering division | 4 |
| Engineering | 3 |
| Public works | 3 |

## Which roles mention TR-55 most?

Water Resources Engineer roles make up 58% of the job posts that name TR-55. The top four roles cover 74% of these job posts.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Water Resources Engineer | 58% | 102 | 41 | 20 |
| Civil Engineer | 8% | 14 | 1 | 7 |
| Program Manager | 4.5% | 8 | 4 | 1 |
| Engineer | 4% | 7 | 3 | 2 |
| Infrastructure Engineer | 4% | 7 | 1 | 1 |
| Civil Designer | 2.3% | 4 | 3 | 1 |

## Which companies started naming TR-55 in job posts recently?

From April to August 2026, 7 companies with 50 or more employees posted their first job naming TR-55: 5 commercial and 2 mid-market. Among the new commercial companies, Fishbeck posted the most jobs naming it: 4.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Fishbeck](https://sumble.com/orgs/fishbeck) | 4 |
| Commercial | [Restoration Services, Inc.](https://sumble.com/orgs/rsi-entech) | 2 |
| Commercial | [AAA Life Insurance Company](https://sumble.com/orgs/aaa-life-insurance) | 1 |
| Commercial | [KLJ](https://sumble.com/orgs/klj-engineering) | 1 |
| Commercial | [IBTS - Institute for Building Technology and Safety](https://sumble.com/orgs/institute-for-building-technology-and-safety-ibts) | 1 |

Companies that named TR-55 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 TR-55 companies use?

TR-55 companies are 1670 times as likely as similar companies to use TR-20: 49.6% of them, against 0.03%. AASHTOWare BrR comes second, 424 times as common as usual, at 14%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| TR-20 | 63 | 49.6% | 0.03% | 1670 times |
| AASHTOWare BrR | 18 | 14% | 0.03% | 424 times |
| PondPack | 20 | 16% | 0.04% | 386 times |
| SRH-2D | 18 | 14% | 0.04% | 363 times |
| HY-8 | 58 | 46% | 0.13% | 350 times |
| LEAP Bridge | 16 | 13% | 0.04% | 339 times |
| Hydraflow | 28 | 22% | 0.07% | 314 times |
| TransModeler | 16 | 13% | 0.04% | 313 times |

Shares are out of the 127 companies whose job posts name TR-55, 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.