# HDR - **Answer**: HDR builds mostly with Prolog, Python, SQL, C#. Its stack also includes Power BI, Windows, Snowflake, Matplotlib. Prolog is named in 39 of the 690 job postings HDR published in the last 12 months (6%). Counted by Alion from the job postings of HDR, updated Nov 15, 2026. - **Window days**: 365 - **Postings analysed**: 690 - **Open postings**: 491 - **Technologies in use**: 83 - **Modernity score**: 65 - **Ai adoption**: no - **License**: CC BY-SA 4.0 ## Company - **Id**: 1771313 - **Name**: HDR - **Domain**: hdrinc.com - **Url**: ## Technologies - **AutoCAD** — Layer: tools; Postings: 530; Share: 0.7681; Required: 59; Open postings: 379; First seen: 2024-07-19 - **Adobe Photoshop** — Layer: tools; Postings: 45; Share: 0.0652; Required: 0; Open postings: 32; First seen: 2025-12-16 - **Prolog** — Layer: languages; Postings: 39; Share: 0.0565; Required: 0; Open postings: 25; First seen: 2026-04-11 - **Microsoft Excel** — Layer: tools; Postings: 28; Share: 0.0406; Required: 6; Open postings: 16; First seen: 2025-11-20 - **Python** — Layer: languages; Postings: 24; Share: 0.0348; Required: 7; Open postings: 15; First seen: 2026-07-30 - **Power BI** — Layer: cloud; Postings: 20; Share: 0.029; Required: 8; Open postings: 10; First seen: 2025-11-20 - **SQL** — Layer: languages; Postings: 16; Share: 0.0232; Required: 5; Open postings: 8; First seen: 2026-04-17 - **Windows** — Layer: cloud; Postings: 16; Share: 0.0232; Required: 0; Open postings: 10; First seen: 2025-12-11 - **Snowflake** — Layer: data; Postings: 11; Share: 0.0159; Required: 7; Open postings: 5; First seen: 2026-04-17 - **EVMS** — Layer: practices; Postings: 9; Share: 0.013; Required: 1; Open postings: 8; First seen: 2026-10-12 - **Tableau** — Layer: cloud; Postings: 8; Share: 0.0116; Required: 2; Open postings: 3; First seen: 2026-04-17 - **Azure** — Layer: cloud; Postings: 7; Share: 0.0101; Required: 2; Open postings: 6; First seen: 2026-05-27 - **ETL/ELT** — Layer: practices; Postings: 7; Share: 0.0101; Required: 1; Open postings: 5; First seen: 2026-07-30 - **CI/CD** — Layer: practices; Postings: 6; Share: 0.0087; Required: 2; Open postings: 5; First seen: 2026-04-17 - **Machine Learning** — Layer: practices; Postings: 5; Share: 0.0072; Required: 3; Open postings: 2; First seen: 2026-08-18 - **Copilot** — Layer: tools; Postings: 5; Share: 0.0072; Required: 2; Open postings: 2; First seen: 2026-08-22 - **C#** — Layer: languages; Postings: 5; Share: 0.0072; Required: 0; Open postings: 5; First seen: 2026-09-05 - **JavaScript** — Layer: languages; Postings: 5; Share: 0.0072; Required: 0; Open postings: 5; First seen: 2026-09-05 - **ETAP** — Layer: tools; Postings: 4; Share: 0.0058; Required: 1; Open postings: 3; First seen: 2026-08-26 - **NERC CIP** — Layer: practices; Postings: 4; Share: 0.0058; Required: 1; Open postings: 4; First seen: 2026-11-03 - **Adobe Illustrator** — Layer: tools; Postings: 4; Share: 0.0058; Required: 0; Open postings: 2; First seen: 2026-07-30 - **Adobe InDesign** — Layer: tools; Postings: 4; Share: 0.0058; Required: 0; Open postings: 3; First seen: 2026-09-25 - **MATLAB** — Layer: languages; Postings: 4; Share: 0.0058; Required: 0; Open postings: 2; First seen: 2025-12-11 - **Alteryx** — Layer: tools; Postings: 3; Share: 0.0043; Required: 2; Open postings: 2; First seen: 2026-08-22 - **Digital Twin** — Layer: practices; Postings: 3; Share: 0.0043; Required: 1; Open postings: 3; First seen: 2026-06-26 - **.NET** — Layer: cloud; Postings: 3; Share: 0.0043; Required: 0; Open postings: 3; First seen: 2026-09-26 - **Azure DevOps** — Layer: cloud; Postings: 3; Share: 0.0043; Required: 0; Open postings: 2; First seen: 2026-05-27 - **Matplotlib** — Layer: frameworks; Postings: 3; Share: 0.0043; Required: 0; Open postings: 1; First seen: 2026-08-18 - **Pandas** — Layer: frameworks; Postings: 3; Share: 0.0043; Required: 0; Open postings: 1; First seen: 2026-08-18 - **Plotly** — Layer: frameworks; Postings: 3; Share: 0.0043; Required: 0; Open postings: 1; First seen: 2026-08-18 - **Seaborn** — Layer: frameworks; Postings: 3; Share: 0.0043; Required: 0; Open postings: 1; First seen: 2026-08-18 - **Visual Basic** — Layer: languages; Postings: 3; Share: 0.0043; Required: 0; Open postings: 2; First seen: 2025-12-11 - **FinOps** — Layer: practices; Postings: 2; Share: 0.0029; Required: 2; Open postings: 2; First seen: 2026-05-27 - **AI Agents** — Layer: practices; Postings: 2; Share: 0.0029; Required: 1; Open postings: 1; First seen: 2026-06-26 - **ANSYS** — Layer: tools; Postings: 2; Share: 0.0029; Required: 1; Open postings: 2; First seen: 2026-10-23 - **Git** — Layer: tools; Postings: 2; Share: 0.0029; Required: 1; Open postings: 1; First seen: 2026-04-17 - **Oracle** — Layer: data; Postings: 2; Share: 0.0029; Required: 1; Open postings: 2; First seen: 2026-08-22 - **PSCAD** — Layer: tools; Postings: 2; Share: 0.0029; Required: 1; Open postings: 2; First seen: 2026-08-26 - **QGIS** — Layer: tools; Postings: 2; Share: 0.0029; Required: 1; Open postings: 2; First seen: 2026-10-19 - **AWS** — Layer: cloud; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-09-29 - **Java** — Layer: languages; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-09-26 - **MAUI** — Layer: frameworks; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-07-22 - **Node JS** — Layer: languages; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-09-28 - **SAS** — Layer: languages; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-11-02 - **SPSS** — Layer: languages; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-11-02 - **Wireshark** — Layer: tools; Postings: 2; Share: 0.0029; Required: 0; Open postings: 2; First seen: 2026-06-15 - **Bottleneck** — Layer: frameworks; Postings: 1; Share: 0.0014; Required: 1; Open postings: 1; First seen: 2026-10-16 - **Computer Vision** — Layer: practices; Postings: 1; Share: 0.0014; Required: 1; Open postings: 0; First seen: 2026-10-06 - **Go** — Layer: languages; Postings: 1; Share: 0.0014; Required: 1; Open postings: 0; First seen: 2026-04-29 - **IAM** — Layer: practices; Postings: 1; Share: 0.0014; Required: 1; Open postings: 1; First seen: 2026-06-15 - … 33 more in the JSON form ## Changes ### First appeared - **NERC CIP** — First seen: 2026-11-03 - **SAS** — First seen: 2026-11-02 - **SPSS** — First seen: 2026-11-02 - **ANSYS** — First seen: 2026-10-23 - **QGIS** — First seen: 2026-10-19 - **EVMS** — First seen: 2026-10-12 - **AWS** — First seen: 2026-09-29 - **Node JS** — First seen: 2026-09-28 ### Rising - **Python** — Share from: 1; Share to: 5 - **Windows** — Share from: 1; Share to: 3 ## Similar stacks - [Arcadis](https://alion.io/company/arcadis/technologies) — Shared technologies: 57 - [WSP](https://alion.io/company/wsp-ca/technologies) — Shared technologies: 62 - [AECOM](https://alion.io/company/aecom/technologies) — Shared technologies: 59 - [Texas A&M University System](https://alion.io/company/tamus/technologies) — Shared technologies: 56 - [Danfoss](https://alion.io/company/danfoss/technologies) — Shared technologies: 52 - [Seagate Technology](https://alion.io/company/seagate-com/technologies) — Shared technologies: 56 - [Siemens Energy](https://alion.io/company/siemens-energy/technologies) — Shared technologies: 60 - [ExxonMobil](https://alion.io/company/exxonmobil/technologies) — Shared technologies: 52 --- [Page](https://alion.io/company/hdrinc/technologies) · [JSON](https://alion.io/company/hdrinc/technologies.json) Source: Alion (alion.io), 2026-11-15. 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