# Companies using IBM CPLEX

7,185 companies in our data use IBM CPLEX, and 1,194 of them name it in job posts they wrote. Its share of job posts held steady in the three months to August 2026; 1,162 job posts named it from October 2025 to August 2026. Data Scientist roles mention it most.

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

## Which companies name IBM CPLEX in the most job posts?

Amazon, o9 Solutions, Inc. and Walmart mention IBM CPLEX in the most job posts. Of the five companies in the table, Amazon has the most employees who list it on their profiles: 242.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Amazon](https://sumble.com/orgs/amazon) | 182 | 242 | "Experience with advanced use of 3P mathematical optimization software such as cplex/gurobi/xpress" (Applied Scientist, SCOT-Inbound Systems, Sep 19, 2026) |
| [o9 Solutions, Inc.](https://sumble.com/orgs/o9solutions) | 115 | 13 | "Statistical, Optimization and Simulation skills through software tools and packages like R, SAS, CPLEX or similar is required" (Solution Architect, Oct 21, 2026) |
| [Walmart](https://sumble.com/orgs/walmart) | 76 | 68 | "Utilize programming languages such as Python, R, CPLEX and SQL to analyze large datasets and optimize algorithms." ((USA) Senior Manager, Data Science - Last Mile Optimization, Jun 27, 2026) |
| [Hitachi Energy](https://sumble.com/orgs/hitachi-energy) | 70 | 14 | "Minimum 5 years of experience with optimization modeling tools and solvers such as AMPL, AIMMS, CPLEX, or Gurobi." (Senior Optimization Engineer, Oct 20, 2026) |
| [United Airlines](https://sumble.com/orgs/united-airlines) | 67 | 17 | "Coursework or work experience in model prototyping through use of optimization toolkit(s) including CPLEX, AMPL, or OPL" (Senior Data Scientist - Operations Research, Sep 12, 2026) |

## Is hiring for IBM CPLEX growing?

Hiring for IBM CPLEX barely changed, at 0.60 in every 10,000 job posts from June to August 2026 against 0.64 from March to May. Its busiest month was May 2026, at 0.68.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 72 | 1,413,673 | 0.51 |
| Nov 2025 | 119 | 1,822,119 | 0.65 |
| Dec 2025 | 77 | 1,236,103 | 0.62 |
| Jan 2026 | 98 | 1,828,002 | 0.54 |
| Feb 2026 | 116 | 1,856,647 | 0.62 |
| Mar 2026 | 107 | 1,850,711 | 0.58 |
| Apr 2026 | 113 | 1,728,886 | 0.65 |
| May 2026 | 124 | 1,821,509 | 0.68 |
| Jun 2026 | 112 | 1,909,496 | 0.59 |
| Jul 2026 | 112 | 1,815,180 | 0.62 |
| Aug 2026 | 112 | 1,835,698 | 0.61 |

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

From June to August 2026, 70 companies posted their first job naming IBM CPLEX; 59 did from March to May. From October 2025 to August 2026, 225 companies named it in a job post for the first time.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 59 |
| June to August 2026 | 70 |
| October 2025 to August 2026 | 225 |

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 IBM CPLEX?

5,991 of the 7,185 companies show up because employees list IBM CPLEX on their profiles; 1,194 name it in their own job posts. 521 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name IBM CPLEX | 1,194 | 17% |
| Employees' profiles list IBM CPLEX | 5,991 | 83% |

## What size are the companies that use IBM CPLEX?

IBM CPLEX leans toward large companies. 24% of its users are companies with 1,000 to 5,000 employees, against 17% on the typical tech page. 1,159 of its companies have fewer than 50 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 16% | 22% |
| 50 to 999 | 38% | 38% |
| 1,000 to 5,000 | 24% | 17% |
| Over 5,000 | 22% | 23% |

## Where are IBM CPLEX companies based?

Turkey is 6.5 times as common among IBM CPLEX companies as on the typical tech page, at 4.9%. The United States leads overall with 32%. Germany is second, at 7.2%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 2,200 | 32% | 43% |
| Germany | 503 | 7.2% | 4.4% |
| France | 487 | 7% | 4.6% |
| Canada | 449 | 6.5% | 3.6% |
| Turkey | 337 | 4.9% | 0.75% |
| United Kingdom | 285 | 4.1% | 6.4% |

## Which teams work with IBM CPLEX?

Data science teams are the most common home for IBM CPLEX, at 47 companies, followed by operations research and advanced analytics.

| Team | Companies |
|---|---:|
| Data science | 47 |
| Operations research | 24 |
| Advanced analytics | 12 |
| Optimization | 8 |
| Data engineering | 7 |
| Digital | 7 |

## Which roles mention IBM CPLEX most?

Data Scientist and Researcher roles account for 34% of the job posts that name IBM CPLEX. Data Scientist posts naming it numbered 89 from March to May 2026 and 75 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Data Scientist | 24% | 283 | 89 | 75 |
| Researcher | 10% | 117 | 34 | 27 |
| Software Engineer | 6.9% | 80 | 22 | 20 |
| AI Engineer | 5.6% | 65 | 15 | 24 |
| Industrial Engineer | 4.3% | 50 | 17 | 11 |
| Analyst | 4.1% | 48 | 6 | 13 |

## Which companies started naming IBM CPLEX in job posts recently?

Between April and August 2026, 77 companies with 50 or more employees first named IBM CPLEX in a job post, 26 of them with more than 5,000 employees. Bombardier leads the new enterprise companies, with 6 job posts from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Avathon](https://sumble.com/orgs/sparkcognition) | 5 |
| Commercial | [American International University, Kuwait](https://sumble.com/orgs/american-international-university-kuwait) | 3 |
| Commercial | [Pelico](https://sumble.com/orgs/pelico) | 3 |
| Commercial | [Qaracter - Beyond your Challenge](https://sumble.com/orgs/qaracter-mexico) | 2 |
| Commercial | [Teledyne Brown Engineering](https://sumble.com/orgs/teledynebrown) | 2 |
| Mid-market | [Virgin Australia](https://sumble.com/orgs/virgin-australia) | 2 |
| Mid-market | [Prodapt](https://sumble.com/orgs/prodapt-solutions) | 2 |
| Mid-market | [Hanwha Systems](https://sumble.com/orgs/한화시스템) | 2 |
| Mid-market | [Test Yantra](https://sumble.com/orgs/test-yantra-software-solutions-private-limited) | 2 |
| Mid-market | [Quince](https://sumble.com/orgs/lastbrand) | 2 |
| Enterprise | [Bombardier](https://sumble.com/orgs/bombardier) | 6 |
| Enterprise | [Sabre](https://sumble.com/orgs/sabre) | 5 |
| Enterprise | [Baker Hughes](https://sumble.com/orgs/baker-hughes) | 4 |
| Enterprise | [CI&T](https://sumble.com/orgs/ci&t) | 4 |
| Enterprise | [Johnson & Johnson MedTech](https://sumble.com/orgs/neuwave) | 3 |

Companies that named IBM CPLEX 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 IBM CPLEX companies use?

IBM CPLEX companies are 81 times as likely as similar companies to use Gurobi: 86% of them, against 1.1%. Pyomo comes second, 73 times as common as usual, at 23%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Gurobi | 606 | 86% | 1.1% | 81 times |
| Pyomo | 165 | 23% | 0.32% | 73 times |
| AMPL | 49 | 7% | 0.13% | 53 times |
| GAMS | 82 | 12% | 0.42% | 27 times |
| AnyLogic | 64 | 9.1% | 0.5% | 18 times |
| Ray | 59 | 8.4% | 0.88% | 10 times |
| GeoPandas | 37 | 5.3% | 0.57% | 9.3 times |
| PSS/E | 50 | 7.1% | 0.78% | 9.2 times |

Shares are out of the 704 companies whose job posts name IBM CPLEX, not counting firms whose job posts name almost every technology.

## Which project themes come up in IBM CPLEX job posts?

258 job posts naming IBM CPLEX describe broad digital transformation, and 20 describe Cloud Cost Optimization work. After that comes Data Infrastructure Migration, with 20.

| Project theme | Job posts |
|---|---:|
| Digital Transformation | 258 |
| Cloud Cost Optimization | 20 |
| Data Infrastructure Migration | 20 |
| Cloud Migration | 19 |

## 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.