# David Duffield

id: ent_david-duffield  
wikidata: Q5233095  
kind: person  
timeline: /timelines/david-duffield.md  
page: /record/david-duffield  
same_as: https://asof.is/record/david-duffield (how to cite the id: /identifiers.md)  

David Duffield is an American engineer and entrepreneur. On the record, David Duffield is a founder of Workday.

## Key facts

- Founder: Workday · claim: /claim/clm_A0EC5ED9DCEA.md

## Questions

**What roles does David Duffield hold?** Founder of Workday, as the AsOf record states with its sources.

**What is David Duffield's role at Workday?** Founder.

## Fact pages

One page per fact: the current value with its sources, then every dated value and what replaced what. Fetch any of them as markdown.

- [David Duffield founder roles](/record/david-duffield/founder_of.md)

## Current state

What the record asserts: claims that held, valid by their sources or primary-sourced at confidence 0.7 or more. Unverified, disputed, retracted and review-marked claims are listed below, labelled, not here.

- [David Duffield](/record/david-duffield.md) | founder_of | [Workday](/record/workday.md) | valid undated to present | conf 0.80 | valid | [clm_2EEAFDA6C10A](/claim/clm_2EEAFDA6C10A.md)
  sources: https://sbnonline.com/article/67771/, https://www.wikidata.org/wiki/Q8034666, https://fortune.com/2025/04/01/workday-fortune-500-top-5-business-lessons/

## All claims

One claim per line, newest first. Superseded claims stay visible.

- [David Duffield](/record/david-duffield.md) | founder_of | [Workday](/record/workday.md) | valid undated to present | conf 0.80 | valid | [clm_2EEAFDA6C10A](/claim/clm_2EEAFDA6C10A.md)
  sources: https://sbnonline.com/article/67771/, https://www.wikidata.org/wiki/Q8034666, https://fortune.com/2025/04/01/workday-fortune-500-top-5-business-lessons/
- [David Duffield](/record/david-duffield.md) | ceo_of | [Workday](/record/workday.md) | valid 2005-01-01 to 2014-05-13 | conf 0.85 | superseded | [clm_03260C1C8E5A](/claim/clm_03260C1C8E5A.md)
  sources: https://www.wikidata.org/wiki/Q8034666, https://businesschief.com/news/why-is-workday-co-founder-returning-as-ceo-again, https://www.sec.gov/Archives/edgar/data/1327811/000119312514199664/d727055d8k.htm, https://www.sec.gov/Archives/edgar/data/1327811/000119312518138883/d510652ddef14a.htm

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.