# Clean Harbors - **Answer**: Clean Harbors builds mostly with SQL, JavaScript, C#, TypeScript. Its stack also includes Windows, Azure, Angular, ASP.NET Core. Windows is named in 117 of the 994 job postings Clean Harbors published in the last 12 months (12%). Counted by Alion from the job postings of Clean Harbors, updated Nov 15, 2026. - **Window days**: 365 - **Postings analysed**: 994 - **Open postings**: 353 - **Technologies in use**: 98 - **Modernity score**: 75 - **Ai adoption**: yes - **License**: CC BY-SA 4.0 ## Company - **Id**: 1849239 - **Name**: Clean Harbors - **Domain**: cleanharbors.com - **Url**: ## Technologies - **HPC** — Layer: practices; Postings: 733; Share: 0.7374; Required: 733; Open postings: 255; First seen: 2026-04-30 - **Windows** — Layer: cloud; Postings: 117; Share: 0.1177; Required: 115; Open postings: 33; First seen: 2026-07-06 - **SQL** — Layer: languages; Postings: 43; Share: 0.0433; Required: 43; Open postings: 19; First seen: 2026-06-11 - **Microsoft Excel** — Layer: tools; Postings: 43; Share: 0.0433; Required: 40; Open postings: 18; First seen: 2026-06-24 - **JavaScript** — Layer: languages; Postings: 34; Share: 0.0342; Required: 22; Open postings: 15; First seen: 2026-06-11 - **C#** — Layer: languages; Postings: 28; Share: 0.0282; Required: 24; Open postings: 11; First seen: 2026-06-11 - **Azure** — Layer: cloud; Postings: 28; Share: 0.0282; Required: 20; Open postings: 12; First seen: 2026-08-21 - **TypeScript** — Layer: languages; Postings: 26; Share: 0.0262; Required: 11; Open postings: 10; First seen: 2026-06-11 - **Angular** — Layer: frameworks; Postings: 25; Share: 0.0252; Required: 25; Open postings: 9; First seen: 2026-06-11 - **Rest API** — Layer: tools; Postings: 18; Share: 0.0181; Required: 18; Open postings: 6; First seen: 2026-08-12 - **Knowledge Distillation** — Layer: practices; Postings: 18; Share: 0.0181; Required: 17; Open postings: 7; First seen: 2026-07-31 - **Model Distillation** — Layer: practices; Postings: 18; Share: 0.0181; Required: 17; Open postings: 7; First seen: 2026-07-31 - **CI/CD** — Layer: practices; Postings: 17; Share: 0.0171; Required: 10; Open postings: 8; First seen: 2026-06-11 - **ASP.NET Core** — Layer: frameworks; Postings: 16; Share: 0.0161; Required: 16; Open postings: 8; First seen: 2026-06-11 - **Copilot** — Layer: tools; Postings: 13; Share: 0.0131; Required: 13; Open postings: 7; First seen: 2026-08-12 - **Cursor** — Layer: tools; Postings: 13; Share: 0.0131; Required: 13; Open postings: 7; First seen: 2026-08-12 - **.NET** — Layer: cloud; Postings: 12; Share: 0.0121; Required: 12; Open postings: 3; First seen: 2026-06-11 - **Dynatrace** — Layer: cloud; Postings: 11; Share: 0.0111; Required: 11; Open postings: 3; First seen: 2026-08-27 - **AutoCAD** — Layer: tools; Postings: 10; Share: 0.0101; Required: 10; Open postings: 5; First seen: 2026-09-21 - **Docker** — Layer: tools; Postings: 10; Share: 0.0101; Required: 6; Open postings: 5; First seen: 2026-06-11 - **Chromatography** — Layer: practices; Postings: 9; Share: 0.0091; Required: 9; Open postings: 3; First seen: 2026-09-29 - **Claude** — Layer: ai; Postings: 9; Share: 0.0091; Required: 9; Open postings: 5; First seen: 2026-08-21 - **GitHub** — Layer: cloud; Postings: 9; Share: 0.0091; Required: 9; Open postings: 3; First seen: 2026-05-08 - **MS SQL** — Layer: data; Postings: 9; Share: 0.0091; Required: 9; Open postings: 3; First seen: 2026-08-27 - **Prompt Engineering** — Layer: practices; Postings: 9; Share: 0.0091; Required: 9; Open postings: 5; First seen: 2026-08-21 - **Python** — Layer: languages; Postings: 8; Share: 0.008; Required: 8; Open postings: 2; First seen: 2026-06-11 - **Azure DevOps** — Layer: cloud; Postings: 8; Share: 0.008; Required: 7; Open postings: 4; First seen: 2026-09-29 - **ETL/ELT** — Layer: practices; Postings: 7; Share: 0.007; Required: 7; Open postings: 4; First seen: 2026-09-10 - **Incident Management** — Layer: practices; Postings: 7; Share: 0.007; Required: 7; Open postings: 2; First seen: 2026-08-27 - **Kubernetes** — Layer: cloud; Postings: 7; Share: 0.007; Required: 7; Open postings: 3; First seen: 2026-06-11 - **BrowserStack** — Layer: cloud; Postings: 6; Share: 0.006; Required: 6; Open postings: 2; First seen: 2026-05-08 - **Clean Architecture** — Layer: practices; Postings: 6; Share: 0.006; Required: 6; Open postings: 3; First seen: 2026-08-21 - **SOAP** — Layer: practices; Postings: 6; Share: 0.006; Required: 6; Open postings: 3; First seen: 2026-09-07 - **Windows Server** — Layer: cloud; Postings: 6; Share: 0.006; Required: 6; Open postings: 2; First seen: 2026-08-27 - **Machine Learning** — Layer: practices; Postings: 6; Share: 0.006; Required: 4; Open postings: 2; First seen: 2026-09-10 - **PowerShell** — Layer: languages; Postings: 6; Share: 0.006; Required: 4; Open postings: 2; First seen: 2026-08-27 - **Git** — Layer: tools; Postings: 5; Share: 0.005; Required: 5; Open postings: 3; First seen: 2026-08-12 - **Power BI** — Layer: cloud; Postings: 5; Share: 0.005; Required: 4; Open postings: 3; First seen: 2026-09-15 - **SSIS** — Layer: tools; Postings: 5; Share: 0.005; Required: 2; Open postings: 1; First seen: 2026-08-27 - **Capistrano** — Layer: tools; Postings: 4; Share: 0.004; Required: 4; Open postings: 3; First seen: 2026-09-24 - **ChatGPT** — Layer: ai; Postings: 4; Share: 0.004; Required: 4; Open postings: 2; First seen: 2026-09-18 - **Cucumber** — Layer: frameworks; Postings: 4; Share: 0.004; Required: 4; Open postings: 2; First seen: 2026-06-11 - **DNS** — Layer: practices; Postings: 4; Share: 0.004; Required: 4; Open postings: 2; First seen: 2026-10-21 - **Oracle** — Layer: data; Postings: 4; Share: 0.004; Required: 4; Open postings: 2; First seen: 2026-09-07 - **Playwright** — Layer: frameworks; Postings: 4; Share: 0.004; Required: 4; Open postings: 2; First seen: 2026-06-11 - **Selenium** — Layer: frameworks; Postings: 4; Share: 0.004; Required: 4; Open postings: 2; First seen: 2026-06-11 - **SonarQube** — Layer: cloud; Postings: 4; Share: 0.004; Required: 4; Open postings: 1; First seen: 2026-09-11 - **Node JS** — Layer: languages; Postings: 4; Share: 0.004; Required: 2; Open postings: 3; First seen: 2026-08-26 - **Oracle Data Integrator** — Layer: tools; Postings: 4; Share: 0.004; Required: 2; Open postings: 2; First seen: 2026-09-10 - **Postman** — Layer: cloud; Postings: 4; Share: 0.004; Required: 2; Open postings: 2; First seen: 2026-06-11 - … 48 more in the JSON form ## Changes ### First appeared - **Active Directory** — First seen: 2026-11-04 - **GitHub Actions** — First seen: 2026-11-04 - **IAM** — First seen: 2026-11-04 - **RabbitMQ** — First seen: 2026-11-04 - **Azure Cosmos DB** — First seen: 2026-11-04 - **Figma** — First seen: 2026-10-29 - **Material Design** — First seen: 2026-10-29 - **Model Context Protocol** — First seen: 2026-10-29 ### Rising - **Windows** — Share from: 6; Share to: 13 - **Azure** — Share from: 0; Share to: 3 ### Falling - **C#** — Share from: 7; Share to: 2 - **JavaScript** — Share from: 7; Share to: 3 - **Python** — Share from: 4; Share to: 0 - **SQL** — Share from: 7; Share to: 4 - **ASP.NET Core** — Share from: 4; Share to: 1 - **Docker** — Share from: 4; Share to: 1 ### Not seen 180d - **Magento** — Last seen: 2026-04-09 - **PHP** — Last seen: 2026-04-09 ## Similar stacks - [HealthEdge](https://alion.io/company/healthedge/technologies) — Shared technologies: 76 - [Worldline](https://alion.io/company/worldline/technologies) — Shared technologies: 75 - [European Dynamics](https://alion.io/company/european-dynamics/technologies) — Shared technologies: 79 - [Astek Polska](https://alion.io/company/astek-polska-2/technologies) — Shared technologies: 74 - [Stefanini](https://alion.io/company/stefanini-latam/technologies) — Shared technologies: 73 - [Bajaj Finserv](https://alion.io/company/bajaj-finserv/technologies) — Shared technologies: 75 - [Mattel](https://alion.io/company/mattel-inc/technologies) — Shared technologies: 72 - [StoneX Group](https://alion.io/company/stonex/technologies) — Shared technologies: 71 --- [Page](https://alion.io/company/cleanharbors-com/technologies) · [JSON](https://alion.io/company/cleanharbors-com/technologies.json) Source: Alion (alion.io), 2026-11-15. 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