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.
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.
CompanyPostsPeopleRecent job post
WSPProfessional Services · first seen Jul 202214316
"…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
KiewitConstruction · first seen Jul 2022701
"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 CompanyProfessional Services · first seen Jul 2022640
"Experience with AutoCAD, AutoCAD Civil 3D, SWMM, HEC-HMS, HEC-RAS, and TR-55"Water Resources Engineer, Oct 24, 2026
Sargent & LundyProfessional Services · first seen Jul 2023571
"…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 LLCProfessional Services · first seen Sep 2022510
"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
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.
Show the data
Month
Job posts naming TR-55
All job posts
Per 10,000
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.
March to May 20264
June to August 20265
October 2025 to August 202615
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 knowCompaniesShare
Job posts name TR-55
16434%
Employees' profiles list TR-55
31866%
482 companies. Each is counted once, under the strongest evidence we have for it.
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.
Share of its companies
Typical tech page
ShareTypical
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.
ShareTypical
United States
92%43%
Canada
2.2%3.6%
United Kingdom
1.3%6.4%
Australia
0.86%2.2%
India
0.86%6.9%
United Arab Emirates
0.43%1%
Companies in 17 countries and territories. Shares are of companies with a known headquarters country.
Show the data
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.
TeamCompanies
Water resources
6
Transportation
5
Civil engineering
4
Engineering division
4
Engineering
3
Public works
3
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%.
Share of the 127 TR-55 companies counted here whose job posts also name the tool
Typical for companies the same size
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.
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.
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.
RoleSharePosts
Water Resources Engineer
58%102
Civil Engineer
8%14
Program Manager
4.5%8
Engineer
4%7
Infrastructure Engineer
4%7
Civil Designer
2.3%4
Show the data
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
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.
