# Companies using Zemax

5,167 companies use Zemax, based on their job posts and their employees' public profiles. Hiring for it is steady, with 2,289 job posts naming it from October 2025 to August 2026. It comes up most in Optical Engineer job posts.

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

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

The five companies with the most job posts naming Zemax are L3Harris Technologies, Apple, Meta, KLA and ASML. Of the five companies in the table, Apple has the most employees who list it on their profiles: 342.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [L3Harris Technologies](https://sumble.com/orgs/l3harris) | 524 | 58 | "Knowledge of Code V and/or Zemax software tools" (Associate, Electrical Engineering (Rochester, NY), Nov 4, 2026) |
| [Apple](https://sumble.com/orgs/apple) | 368 | 342 | "Proficiency with standard optical simulation and modeling tools (e.g., Zemax OpticStudio, Code V, FRED, or LightTools) and numerical analysis (Python, MATLAB)" (Physicist & Optical Scientist - Q, Nov 7, 2026) |
| [Meta](https://sumble.com/orgs/meta-dd1502f2) | 291 | 155 | "8+ years experience in optical design using standard design software such as Lumerical, Virtual Lab, FRED, LightTools, Zemax, or CODE V" (Optical Scientist - DSR, Nov 4, 2026) |
| [KLA](https://sumble.com/orgs/kla-tencor) | 197 | 146 | "The candidate will be using ray-tracing programs such as Zemax and other industry standard software." (Optical Engineering Intern, Oct 23, 2026) |
| [ASML](https://sumble.com/orgs/asml) | 177 | 218 | "Design and model optical systems using CODE V, Zemax, or comparable optical design software." (Senior Optical Sensing Engineer, Oct 9, 2026) |

## Is hiring for Zemax growing?

Since late 2025, job posts mentioning Zemax went from 1.0 to 1.3 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 | 147 | 1,413,673 | 1.0 |
| Nov 2025 | 175 | 1,822,119 | 0.96 |
| Dec 2025 | 130 | 1,236,103 | 1.1 |
| Jan 2026 | 200 | 1,828,002 | 1.1 |
| Feb 2026 | 211 | 1,856,647 | 1.1 |
| Mar 2026 | 234 | 1,850,711 | 1.3 |
| Apr 2026 | 208 | 1,728,886 | 1.2 |
| May 2026 | 254 | 1,821,509 | 1.4 |
| Jun 2026 | 229 | 1,909,496 | 1.2 |
| Jul 2026 | 252 | 1,815,180 | 1.4 |
| Aug 2026 | 249 | 1,835,698 | 1.4 |

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

108 companies named Zemax in a job post for the first time from June to August 2026, against 84 from March to May. Of the 1,741 companies whose job posts name it, 6.2% first named it from June to August.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 84 |
| June to August 2026 | 108 |
| October 2025 to August 2026 | 313 |

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 Zemax?

We found 5,167 companies that use Zemax, 3,426 of them through employees' profiles alone. 852 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name Zemax | 1,741 | 34% |
| Employees' profiles list Zemax | 3,426 | 66% |

## What size are the companies that use Zemax?

Companies with fewer than 50 employees are 1.4 times as common among Zemax users as on the typical tech page. 741 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 30% | 22% |
| 50 to 999 | 39% | 38% |
| 1,000 to 5,000 | 16% | 17% |
| Over 5,000 | 14% | 23% |

## Where are Zemax companies based?

Beyond the United States (38%), Zemax is unusually common in Germany, at 11% of its companies. Its companies are based in 71 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 1,859 | 38% | 43% |
| Germany | 522 | 11% | 4.4% |
| France | 259 | 5.3% | 4.6% |
| United Kingdom | 257 | 5.3% | 6.4% |
| Canada | 170 | 3.5% | 3.6% |
| India | 167 | 3.4% | 6.9% |

## Which teams work with Zemax?

R&D teams are the most common home for Zemax, at 62 companies, followed by optical engineering and engineering. Optics and optical design teams follow.

| Team | Companies |
|---|---:|
| R&D | 62 |
| Optical engineering | 38 |
| Engineering | 33 |
| Optics | 31 |
| Optical design | 16 |
| Systems engineering | 15 |

## Which roles mention Zemax most?

Optical Engineer roles make up 53% of the job posts that name Zemax. The top four roles cover 63% of these job posts.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Optical Engineer | 53% | 1,204 | 336 | 395 |
| Mechanical Engineer | 5.5% | 125 | 53 | 35 |
| Optometrist | 2.6% | 60 | 14 | 22 |
| Electrical Engineer | 2.5% | 57 | 16 | 22 |
| Systems Engineer | 2.4% | 54 | 17 | 12 |
| Physicist | 2.2% | 51 | 16 | 16 |

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

Between April and August 2026, Zemax appeared for the first time in job posts at 92 companies: 63 commercial, 19 mid-market and 10 enterprise. Celestica has the most job posts of the new enterprise companies, 4 from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Pasqal](https://sumble.com/orgs/pasqal) | 4 |
| Commercial | [SSC - Swedish Space Corporation](https://sumble.com/orgs/swedish-space) | 3 |
| Commercial | [True Anomaly](https://sumble.com/orgs/true-anomaly) | 3 |
| Commercial | [Electro Optic Systems](https://sumble.com/orgs/electro-optic-systems) | 3 |
| Commercial | [Nu Quantum](https://sumble.com/orgs/nu-quantum) | 3 |
| Mid-market | [HID](https://sumble.com/orgs/hid-global) | 2 |
| Mid-market | [Vrije Universiteit Brussel](https://sumble.com/orgs/vrije-universiteit-brussel) | 2 |
| Mid-market | [Warby Parker](https://sumble.com/orgs/warby-parker) | 2 |
| Mid-market | [Radiall](https://sumble.com/orgs/radiall) | 2 |
| Mid-market | [ZKW](https://sumble.com/orgs/zkw-mexico) | 2 |
| Enterprise | [Celestica](https://sumble.com/orgs/celestica) | 4 |
| Enterprise | [Tata Consultancy Services](https://sumble.com/orgs/tata-consultancy-services-tcs) | 2 |
| Enterprise | [Motorola Solutions](https://sumble.com/orgs/motorola-solutions) | 2 |
| Enterprise | [Dentsply Sirona](https://sumble.com/orgs/dentsply-sirona) | 2 |
| Enterprise | [Royal Enfield](https://sumble.com/orgs/royal-enfield) | 2 |

Companies that named Zemax 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 Zemax companies use?

Code V, LightTools and TracePro show up far more often at Zemax companies than at companies of the same size. Next is SpaceWire: 5.3% of these companies use it, against 0.05% of similar ones.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Code V | 488 | 39% | 0.12% | 330 times |
| LightTools | 196 | 15% | 0.06% | 267 times |
| TracePro | 88 | 7% | 0.03% | 240 times |
| SpaceWire | 67 | 5.3% | 0.05% | 111 times |
| LVDS | 129 | 10% | 0.16% | 63 times |
| Ansys HFSS | 122 | 9.6% | 0.16% | 60 times |
| Keysight ADS | 66 | 5.2% | 0.09% | 57 times |
| Vivado | 183 | 14% | 0.26% | 55 times |

Shares are out of the 1,265 companies whose job posts name Zemax, 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.