Chief of the Assessments Staff
Senior civil servant who heads the Assessments Staff of the United Kingdom's Joint Intelligence Organisation
The Chief of the Assessments Staff is a senior civil service post in the Cabinet Office's Joint Intelligence Organisation (JIO). The postholder leads a team of analysts responsible for drafting all-source intelligence assessments for the Joint Intelligence Committee (JIC) and the National Security Council.
The Assessments Staff draws on intelligence from MI5, MI6, GCHQ, Defence Intelligence and other sources, together with diplomatic reporting and open-source material, to produce coordinated assessments on security, defence and foreign affairs issues.[1][2]
Role and responsibilities
The Chief of the Assessments Staff directs the permanent Assessments Staff, a multidisciplinary team of analysts seconded from across government. The team prepares JIC papers that provide ministers and senior officials with timely, objective all-source assessments. The role reports to the Chair of the Joint Intelligence Committee, who is also the head of the JIO and Professional Head of Intelligence Analysis.[3]
The post has no operational or collection responsibilities; it is purely analytical and coordinative.
Position in the intelligence community
The Chief of the Assessments Staff sits inside the Cabinet Office, not within any of the three intelligence agencies (MI5, MI6, GCHQ) or Defence Intelligence. The Assessments Staff acts as the central fusion and assessment arm of the UK intelligence community, ensuring that raw intelligence is turned into policy-relevant assessments for the Prime Minister and National Security Council. It works closely with the agencies but remains independent of them.
People
| # | Name | Term start | Term end | Term length |
|---|---|---|---|---|
| 1 | Paul Rimmer | ~2011 | ~2012 | ~1 year[4] |
| 2 | Robert Tinline | 2017 | 2019 | 2 years[5] |
| 3 | Robert Harrison | August 2019 | ~2022 | ~3 years[6] |
Known holders
Few names of past Chiefs of the Assessments Staff are in the public domain because the post is not routinely announced and holders are career civil servants whose identities surface only in later appointments, organograms or public inquiries.
Known holders include:
- Paul Rimmer (~2009–2012)
- Robert Tinline (2017–2019)
- Robert Harrison (August 2019–~2022)
Why few names are public
The role is internal and low-profile. Unlike agency heads or the JIC Chair, appointments are not the subject of press releases. Names become known only when individuals move to other public roles or appear in official organograms or inquiry evidence.
External links
- Dame Madeleine Alessandri DCB, CMG – description of the JIO and Assessments Staff
Notes
- ↑ UK Government, National Intelligence Machinery GOV.UK, 2010.
- ↑ UK Government, Dame Madeleine Alessandri DCB, CMG GOV.UK, accessed April 2026.
- ↑ UK Government, Dame Madeleine Alessandri DCB, CMG GOV.UK, accessed April 2026.
- ↑ UK Government, National Intelligence Machinery GOV.UK, 2010 (organogram data).
- ↑ UK Government, Change of British High Commissioner to Canada: Robert Tinline GOV.UK, 23 September 2024.
- ↑ Robert Harrison, UK Covid-19 Inquiry Witness Statement UK Covid-19 Inquiry, 16 September 2025.