# Companies using OTN

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.

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

## Which companies name OTN in the most 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.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Ciena](https://sumble.com/orgs/ciena) | 499 | 472 | "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) |
| [Nokia](https://sumble.com/orgs/nokia) | 464 | 562 | "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 Networks](https://sumble.com/orgs/tejas-networks) | 345 | 36 | "…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) |
| [Infinera](https://sumble.com/orgs/infinera) | 103 | 83 | "Practical knowledge of Ethernet, SONET/SDH, DWDM and OTN" (staff sw qa engr, Jun 25, 2025) |
| [Vodafone](https://sumble.com/orgs/vodafone) | 70 | 49 | "Develop an Infrastructure and Services planning DWDM and OTN guidelines." (Senior specialist DWDM & sec engineer, Feb 4, 2026) |

## Is hiring for OTN growing?

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.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| 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.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 33 |
| June to August 2026 | 33 |
| October 2025 to August 2026 | 114 |

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 know | Companies | Share |
|---|---:|---:|
| Job posts name OTN | 663 | 26% |
| Employees' profiles list OTN | 1,847 | 74% |

## 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%.

| Size | Share | Typical tech page |
|---|---:|---:|
| 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%.

| 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.

| Team | Companies |
|---|---:|
| NOC | 10 |
| Network engineering | 8 |
| Engineering | 7 |
| R&D | 7 |
| Operations | 5 |
| Architecture | 4 |

## 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.

| 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 |

## 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.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [China Telecom Asia Pacific](https://sumble.com/orgs/china-telecom-singapore) | 4 |
| Commercial | [ADENTIS Italia](https://sumble.com/orgs/adentis-italia) | 3 |
| Commercial | [VySystems](https://sumble.com/orgs/vysystems) | 2 |
| Commercial | [Enterprise Solutions Inc.](https://sumble.com/orgs/enterprise-solutions) | 2 |
| Commercial | [ELO Telecomunicações e Construções Ltda](https://sumble.com/orgs/elo-telecomunica-es-e-constru-es) | 2 |
| Mid-market | [RMSI](https://sumble.com/orgs/rmsi-india) | 2 |
| Mid-market | [Al Ghurair](https://sumble.com/orgs/al-ghurair-investment) | 2 |
| Mid-market | [Logicalis Latam](https://sumble.com/orgs/logicalis-latam) | 2 |
| Mid-market | [Pacific Northwest National Laboratory](https://sumble.com/orgs/pacific-northwest-national-laboratory) | 1 |
| Mid-market | [FiberCop](https://sumble.com/orgs/fibercop) | 1 |
| Enterprise | [Ventia](https://sumble.com/orgs/ventia) | 8 |
| Enterprise | [Tesla](https://sumble.com/orgs/tesla) | 2 |
| Enterprise | [Equinix](https://sumble.com/orgs/equinix) | 2 |
| Enterprise | [Peraton](https://sumble.com/orgs/peraton) | 2 |
| Enterprise | [Con Edison](https://sumble.com/orgs/con-edison) | 2 |

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.

## 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.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Infinera | 50 | 12% | 0.09% | 135 times |
| ADVA | 25 | 6.2% | 0.06% | 103 times |
| Ciena | 83 | 21% | 0.21% | 101 times |
| ZTE | 33 | 8.2% | 0.1% | 86 times |
| RESTCONF | 33 | 8.2% | 0.12% | 70 times |
| Adtran | 23 | 5.7% | 0.09% | 66 times |
| GPON | 104 | 26% | 0.42% | 61 times |
| NETCONF | 52 | 13% | 0.26% | 51 times |

Shares are out of the 401 companies whose job posts name OTN, 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.