We found 2,510 companies that use OTN. 663 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; 929 job posts named it from October 2025 to August 2026. It comes up most in Network Engineer job posts.
The five companies with the most job posts naming OTN are Ciena, Nokia, Tejas Networks, Infinera and Vodafone. Four of these five companies are in Information.
CompanyPostsPeopleRecent job post
CienaInformation · first seen Aug 2022499472
"Application of coherent optical systems, DWDM, OTN, Ethernet services, optical transport architectures, coherent pluggables, platform software, and network management concepts."Director, Product Line Management, Nov 7, 2026
NokiaInformation · first seen Sep 2022464562
"Contribute to the development of comprehensive test plans for Layer 0 (DWDM) and Layer 1 (OTN, Ethernet) across Long Haul, DCI, and Metro optical systems"sw qa engineer 2, Nov 4, 2026
Tejas NetworksInformation · first seen Nov 202334536
"…standards, fiber broadband (GPON/XGS-PON), carrier-grade optical transmission (DWDM/OTN), packet switching and routing (Ethernet, PTN, IP/MPLS) and Direct-to-Mobile and Satellite-IoT communication…"manager, Oct 28, 2026
InfineraProfessional Services · first seen Sep 202210383
"Practical knowledge of Ethernet, SONET/SDH, DWDM and OTN"staff sw qa engr, Jun 25, 2025
VodafoneInformation · first seen Oct 20227049
"Develop an Infrastructure and Services planning DWDM and OTN guidelines."Senior specialist DWDM & sec engineer, Feb 4, 2026
Demand for OTN is steady: 0.51 in every 10,000 job posts from June to August 2026, close to the 0.50 of March to May. Its busiest month was March 2026, at 0.56.
Show the data
Month
Job posts naming OTN
All job posts
Per 10,000
Oct 2025
55
1,413,673
0.39
Nov 2025
83
1,822,119
0.46
Dec 2025
60
1,236,103
0.49
Jan 2026
96
1,828,002
0.53
Feb 2026
86
1,856,647
0.46
Mar 2026
104
1,850,711
0.56
Apr 2026
78
1,728,886
0.45
May 2026
86
1,821,509
0.47
Jun 2026
102
1,909,496
0.53
Jul 2026
81
1,815,180
0.45
Aug 2026
98
1,835,698
0.53
How many companies named OTN in a job post for the first time in recent months?
From June to August 2026, 33 companies posted their first job naming OTN; 33 did from March to May. The 33 from June to August are 5% of all 663 companies whose job posts name it.
March to May 202633
June to August 202633
October 2025 to August 2026114
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 OTN?
663 companies name OTN in their own job posts. The other 1,847 show up because employees list it on their profiles. 248 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name OTN
66326%
Employees' profiles list OTN
1,84774%
2,510 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use OTN?
By size, the biggest group of OTN users is companies with 50 to 999 employees, at 41%. The second-largest group is companies with 1,000 to 5,000 employees, at 22%.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
16%22%
50 to 999
41%38%
1,000 to 5,000
22%17%
Over 5,000
21%23%
Where are OTN companies based?
The United States has the most OTN companies (30%), but Italy stands out: 4% of them, against 1.5% on the typical tech page. Canada is second, at 6.8%.
ShareTypical
United States
30%43%
Canada
6.8%3.6%
India
5.4%6.9%
United Kingdom
5.3%6.4%
Brazil
4.1%2.8%
Italy
4%1.5%
Companies in 103 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
716
30%
43%
Canada
163
6.8%
3.6%
India
129
5.4%
6.9%
United Kingdom
128
5.3%
6.4%
Brazil
98
4.1%
2.8%
Italy
97
4%
1.5%
Which teams work with OTN?
NOC is the team named most often in OTN job posts, at 10 companies.
TeamCompanies
NOC
10
Network engineering
8
Engineering
7
R&D
7
Operations
5
Architecture
4
What else do OTN companies use?
OTN companies are 135 times as likely as similar companies to use Infinera: 12% of them, against 0.09%. Next is ADVA: 6.2% of these companies use it, against 0.06% of similar ones.
Share of the 401 OTN companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming OTN in job posts recently?
Between April and August 2026, OTN appeared for the first time in job posts at 45 companies: 21 commercial, 14 mid-market and 10 enterprise. Ventia has the most job posts of the new enterprise companies, 8 from April to August.
Companies that named OTN 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 OTN most?
Network Engineer is the most common role, in 6.7% of job posts naming OTN. The top four roles cover 22% of these job posts.
RoleSharePosts
Network Engineer
6.7%62
Software Engineer
5.8%54
Network Operations Engineer
5.2%48
Telecommunications Engineer
4.4%41
Customer Engineer
4%37
Hardware Engineer
3.8%35
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Network Engineer
6.7%
62
19
15
Software Engineer
5.8%
54
16
15
Network Operations Engineer
5.2%
48
13
9
Telecommunications Engineer
4.4%
41
12
13
Customer Engineer
4%
37
13
11
Hardware Engineer
3.8%
35
2
20
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.
