Theo de Raadt

Leader of the OpenBSD project
Person human Q18950
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Theo de Raadt

Summary

Theo de Raadt is a human[1]. His place of birth was Pretoria[2]. He was born on May 19, 1968[3]. He worked as a computer scientist[4], engineer[5], network engineer[6], programmer[7], and software engineer[8]. He ranks in the top 0.72% of human entities by monthly Wikipedia readership (510 views/month, #7,183 of 1,000,298).[9]

Key Facts

  • Theo de Raadt was born in Pretoria[2].
  • Theo de Raadt was born on May 19, 1968[3].
  • Theo de Raadt held citizenship in Canada[10].
  • Theo de Raadt held citizenship in South Africa[11].
  • Theo de Raadt's professions included computer scientist[4].
  • Theo de Raadt worked as an engineer[5].
  • Theo de Raadt worked as a network engineer[6].
  • Theo de Raadt worked as a programmer[7].
  • Theo de Raadt worked as a software engineer[8].
  • Theo de Raadt's field of work was programmer[12].
  • Theo de Raadt was educated at University of Calgary[13].
  • A notable work attributed to Theo de Raadt is Q34225[14].
  • A notable work attributed to Theo de Raadt is OpenBSD[15].
  • A notable work attributed to Theo de Raadt is OpenSSH[16].
  • A notable work attributed to Theo de Raadt is Calgary Internet Exchange[17].
  • Theo de Raadt received the FSF Award for the Advancement of Free Software[18].
  • Theo de Raadt is recorded as male[19].
  • Theo de Raadt's instance of is recorded as human[20].
  • Theo de Raadt's Commons category is recorded as Theo de Raadt[21].
  • Theo de Raadt earned the academic degree of Bachelor of Science[22].
  • Theo de Raadt's residence is recorded as Calgary[23].
  • Theo de Raadt's family name is recorded as de Raadt[24].
  • Theo de Raadt's given name is recorded as Theo[25].
  • Theo de Raadt's official website is recorded as https://www.theos.com/deraadt/[26].
  • Theo de Raadt's languages spoken, written or signed is recorded as English[27].

Product Details

The following facts are restated verbatim from public-domain and CC0 open-data sources — every line is independently verifiable against the named source's catalog.

MusicBrainz — CC0 open music encyclopedia

  • Type: Person[28]

  • Country: CA[29]

  • Began / founded: 1968-05-19[30]

  • MusicBrainz ID: 11ff06a3-6127-4b6d-9b43-bafcd8c650da[31]

Body

Origins and Family

Born in Pretoria[2], Theo de Raadt… he was born on May 19, 1968[3].

Education

Theo de Raadt's education included a stint at University of Calgary[13]. He earned the academic degree of Bachelor of Science[22].

Career and Affiliations

Recorded occupations include computer scientist[4], engineer[5], network engineer[6], programmer[7], and software engineer[8]. Theo de Raadt's field of work was programmer[12].

Works and Contributions

Notable works include Q34225[14], a BSD[32]; OpenBSD[15], a security-focused operating system[33], founded in 1995[34]; OpenSSH[16], a daemon[35], founded in 1999[36]; and Calgary Internet Exchange[17], an Internet exchange point[37].

Recognition

Theo de Raadt received the FSF Award for the Advancement of Free Software[18].

Why It Matters

Theo de Raadt ranks in the top 0.72% of human entities by monthly Wikipedia readership (510 views/month, #7,183 of 1,000,298).[9] He has Wikipedia articles in 18 language editions, a strong signal of global cultural recognition.[38] He is known by 10 alternative names across languages and contexts.[39]

FAQs

Where was Theo de Raadt born?

Born in Pretoria[2], Theo de Raadt…

What did Theo de Raadt do for work?

Theo de Raadt worked as computer scientist[4], engineer[5], network engineer[6], programmer[7], and software engineer[8].

Where did Theo de Raadt go to school?

Theo de Raadt was educated at University of Calgary[13].

What awards did Theo de Raadt receive?

Honors received include FSF Award for the Advancement of Free Software[18].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] . theage.com.au. theage.com.au. Provenance: wikidata.org.
  2. [19] . wikidata.org.
  3. [10] . wired.com. wired.com. Provenance: wikidata.org.
  4. [11] . wikidata.org.
  5. [20] . wikidata.org.
  6. [13] . wikidata.org.
  7. [12] . wikidata.org.
  8. [4] . wikidata.org.
  9. [5] . wikidata.org.
  10. [6] . wikidata.org.
  11. [7] . nndb.com. nndb.com. Provenance: wikidata.org.
  12. [8] . izquotes.com. izquotes.com. Provenance: wikidata.org.
  13. [18] . fsf.org. Retrieved . fsf.org. Provenance: wikidata.org.
  14. [21] . wikidata.org.
  15. [22] . wikidata.org.
  16. [23] . wikidata.org.
  17. [3] . nndb.com. nndb.com. Provenance: wikidata.org.
  18. [24] . wikidata.org.
  19. [25] . wikidata.org.
  20. [14] . wikidata.org.
  21. [15] . bxr.su. bxr.su. Provenance: wikidata.org.
  22. [16] . openbsd.su. openbsd.su. Provenance: wikidata.org.
  23. [17] . wikidata.org.
  24. [26] . wikidata.org.
  25. [27] . wikidata.org.

Product details (FDA / USDA / NHTSA public-domain catalog data)

  1. [28] . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  2. [29] . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  3. [30] . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  4. [31] . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.

Inline context (facts about related entities)

  1. [32] . Wikidata. wikidata.org. → on this site
  2. [33] . Wikidata. wikidata.org. → on this site
  3. [34] . Wikidata. wikidata.org. → on this site
  4. [35] . Wikidata. wikidata.org. → on this site
  5. [36] . Wikidata. wikidata.org. → on this site
  6. [37] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [9] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [38] . Wikidata sitelinks. wikidata.org.
  3. [39] . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Theo de Raadt. Retrieved March 9, 2026, from https://4ort.xyz/entity/theo-de-raadt
MLA “Theo de Raadt.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Mar. 2026, https://4ort.xyz/entity/theo-de-raadt.
BibTeX @misc{4ortxyz_theo-de-raadt_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Theo de Raadt}}, year = {2026}, url = {https://4ort.xyz/entity/theo-de-raadt}, note = {Accessed: 2026-03-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Theo de Raadt — https://4ort.xyz/entity/theo-de-raadt (retrieved 2026-03-09)

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