# Companies using HART

9,016 companies use HART, based on their job posts and their employees' public profiles. Its share of job posts held steady in the three months to August 2026; 1,374 job posts named it from October 2025 to August 2026. It comes up most in Skilled Trades job posts.

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

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

Emerson has posted more jobs naming HART than any other company: 324. Three of these five companies are in Manufacturing.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Emerson](https://sumble.com/orgs/emerson) | 324 | 100 | "Working knowledge of embedded communication interfaces and industrial protocols such as CAN, SPI, UART/SCI, I²C, HART, Modbus, and PROFIBUS" (Principal Embedded Software Engineer, Nov 8, 2026) |
| [Honeywell Technologies](https://sumble.com/orgs/honeywell) | 291 | 54 | "Communication protocols: BPM, MODBUS, HART, OPC UA and DSA." (systems engr ii, Nov 7, 2026) |
| [Schneider Electric](https://sumble.com/orgs/schneider-electric) | 172 | 36 | "Should understand the various industrial communication protocols like Modbus, Profibus, HART, FF etc.…" (manager - engineering, Nov 7, 2026) |
| [Smithfield Foods](https://sumble.com/orgs/smithfield-foods) | 155 | 0 | "Computer/device communications using standard protocols including TCP/IP, Ethernet/IP, Device net, Modbus, Hart, Serial" (Industrial Electrician - 3rd Shift (Sign-On Bonus & Relocation!), Nov 1, 2026) |
| [Siemens](https://sumble.com/orgs/siemens) | 128 | 30 | "Knowledge of field communication protocols: HART, IO-Link, PROFIBUS PA, PROFINET, Modbus." (Account Manager/Director, Oct 23, 2026) |

## Is hiring for HART growing?

HART holds a steady place in hiring. 0.77 in every 10,000 job posts named it from June to August 2026, against 0.72 from March to May.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 112 | 1,413,673 | 0.79 |
| Nov 2025 | 115 | 1,822,119 | 0.63 |
| Dec 2025 | 94 | 1,236,103 | 0.76 |
| Jan 2026 | 110 | 1,828,002 | 0.60 |
| Feb 2026 | 126 | 1,856,647 | 0.68 |
| Mar 2026 | 122 | 1,850,711 | 0.66 |
| Apr 2026 | 137 | 1,728,886 | 0.79 |
| May 2026 | 129 | 1,821,509 | 0.71 |
| Jun 2026 | 145 | 1,909,496 | 0.76 |
| Jul 2026 | 150 | 1,815,180 | 0.83 |
| Aug 2026 | 134 | 1,835,698 | 0.73 |

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

HART showed up in job posts at 82 companies for the first time from June to August 2026, and 73 in the three months before. That brings the companies naming it for the first time since October 2025 to 246, through August 2026.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 73 |
| June to August 2026 | 82 |
| October 2025 to August 2026 | 246 |

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 HART?

1,283 companies name HART in job posts they wrote; employees' profiles add 7,733 more. 306 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name HART | 1,283 | 14% |
| Employees' profiles list HART | 7,733 | 86% |

## What size are the companies that use HART?

Companies with 50 to 999 employees stand out among HART users: 47%, against 38% on the typical tech page. 2,185 of its companies have fewer than 50 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 24% | 22% |
| 50 to 999 | 47% | 38% |
| 1,000 to 5,000 | 17% | 17% |
| Over 5,000 | 12% | 23% |

## Where are HART companies based?

Belgium is 6.5 times as common among HART companies as on the typical tech page, at 5.2%. The Netherlands leads overall with 34%. Its companies are based in 117 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| The Netherlands | 2,974 | 34% | 2% |
| United States | 2,073 | 24% | 43% |
| Belgium | 454 | 5.2% | 0.8% |
| United Kingdom | 420 | 4.8% | 6.4% |
| India | 314 | 3.6% | 6.9% |
| Canada | 301 | 3.5% | 3.6% |

## Which teams work with HART?

HART work is spread across teams. Maintenance leads, at 25 companies. Engineering teams are second, at 16 companies, and R&D teams third, at 13.

| Team | Companies |
|---|---:|
| Maintenance | 25 |
| Engineering | 16 |
| R&D | 13 |
| Automation | 9 |
| Instrumentation & controls | 5 |
| Operations | 5 |

## Which roles mention HART most?

No single role dominates for HART; Skilled Trades leads with 25% of the job posts. Skilled Trades posts naming it numbered 99 from March to May 2026 and 103 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Skilled Trades | 25% | 341 | 99 | 103 |
| Control Engineer | 15% | 211 | 69 | 45 |
| Automation Engineer | 6.8% | 94 | 33 | 24 |
| Engineer | 5.5% | 75 | 14 | 24 |
| Electrical Engineer | 4.4% | 61 | 14 | 20 |
| Systems Engineer | 4.4% | 61 | 9 | 29 |

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

Between April and August 2026, 101 companies with 50 or more employees first named HART in a job post, 22 of them with more than 5,000 employees. Smurfit Westrock leads the new enterprise companies, with 5 job posts from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [TSA - Tecnologia de Sistemas de Automação S/A](https://sumble.com/orgs/tsa-tecnologia-de-sistemas-de-automacao) | 3 |
| Commercial | [fairlife](https://sumble.com/orgs/fairlife) | 2 |
| Commercial | [Voyager Technologies](https://sumble.com/orgs/voyager-space-holdings) | 2 |
| Commercial | [ALTEN Mexico](https://sumble.com/orgs/alten-méxico-1) | 2 |
| Commercial | [Blykalla](https://sumble.com/orgs/blykalla) | 2 |
| Mid-market | [Acwa](https://sumble.com/orgs/acwa-power-global-services) | 3 |
| Mid-market | [Equans UK & Ireland](https://sumble.com/orgs/equansuk-ireland) | 3 |
| Mid-market | [SNEF](https://sumble.com/orgs/groupe-snef) | 2 |
| Mid-market | [ENOC](https://sumble.com/orgs/enoc) | 2 |
| Mid-market | [KAEFER RIP Serviços Industriais](https://sumble.com/orgs/rip-servicos-industriais) | 2 |
| Enterprise | [Smurfit Westrock](https://sumble.com/orgs/smurfit-westrock) | 5 |
| Enterprise | [Orano](https://sumble.com/orgs/orano) | 4 |
| Enterprise | [Mota-Engil](https://sumble.com/orgs/mota-engil) | 4 |
| Enterprise | [Givaudan](https://sumble.com/orgs/givaudan) | 3 |
| Enterprise | [Unilever](https://sumble.com/orgs/unilever) | 2 |

Companies that named HART 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 HART companies use?

Compared with companies of the same size, HART companies stand out for using Foundation Fieldbus and Foxboro. Among the tools listed here, DeltaV is the most widely used, at 24% of HART companies.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Foundation Fieldbus | 168 | 18% | 0.18% | 100 times |
| Foxboro | 69 | 7.3% | 0.18% | 40 times |
| DeltaV | 227 | 24% | 0.77% | 31 times |
| CHEMCAD | 50 | 5.3% | 0.18% | 30 times |
| Modbus RTU | 62 | 6.6% | 0.23% | 28 times |
| Yokogawa | 91 | 9.7% | 0.35% | 28 times |
| Modicon | 100 | 11% | 0.39% | 27 times |
| CADWorx | 59 | 6.3% | 0.25% | 25 times |

Shares are out of the 941 companies whose job posts name HART, 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.