Simon Cleobury (@simoncleobury) header
Simon Cleobury (@simoncleobury) profile picture

Simon Cleobury

@simoncleobury

Head, Arms Control and Disarmament @TheGCSP

 Geneva, Switzerland
Joined September 2010
  • Tweets1.6K
  • Following1.4K
  • Followers979
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Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)Photo by Simon Cleobury (@simoncleobury)
We loved welcoming Nicholas Cleobury to CCCS today for a brilliant orchestral workshop. A great opportunity to develop sight-reading and ensemble skills, tackling the Capriol Suite by @ChCh_Oxford alumnus Peter Warlock #music #education #oxford
Image from Christ Church Cathedral School Music Department (@CathedralSchool)
Image from Christ Church Cathedral School Music Department (@CathedralSchool)
Image from Christ Church Cathedral School Music Department (@CathedralSchool)
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Simon Cleobury retweeted
VCDNP (@VCDNP) profile picture
VCDNP
@VCDNP8 Sep 2025
📺 Catch up on the launch event for our latest research on #space security and #PAROS, featuring leading experts 🚀☄️ Watch now ➡️ vcdnp.org/launch-event-paros…
Image from VCDNP (@VCDNP)
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Simon Cleobury retweeted
VCDNP (@VCDNP) profile picture
VCDNP
@VCDNP28 Aug 2025
The VCDNP is going into #space 🪐🛰️Don't miss our first event on space security with 2⃣ new publications by Research Fellow @louisreitmann and a discussion with @almuazcarate at UNIDIR, @simoncleobury at GCSP, and Noelle Riza Castillo at @PhilSpaceAgency 🇵🇭 🗓️ 4 Sep, 2-3:30 PM CEST 💻 Zoom Register here ➡️ vcdnp.org/launch-event-paros…
Image from VCDNP (@VCDNP)
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Thank you @DFAPHL for hosting us. It was a great opportunity to gather together #biosecurity experts from the ASEAN region. Great to work with @spatialdiplomat and with @jjthemango again! Brilliant collaboration as always with @FilippaLentzos and her team!
DFA Philippines 🇵🇭 (@DFAPHL) profile pictureDFA Philippines 🇵🇭
@DFAPHL18 Feb 2025
[1/2] The Department of Foreign Affairs in collaboration with the Geneva Centre for Security Policy (GCSP) and King’s College London (KCL), is hosting back-to-back regional workshops on “Biological Weapons Convention (BWC) Compliance and Verification”
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Best of: Cello abc.net.au/listen/programs/b… via @ABCaustralia
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Simon Cleobury retweeted
Tim Lewis (@TimLewi53640836) profile picture
Tim Lewis@TimLewi5364083623 Nov 2024
Music on St Cecilia’s night. I remember Stephen Cleobury (1948-2019) from King’s Worcester but he was a senior boy and I was a spotty little oik. He was an amazing musician. His younger brother Nicholas continues to be so.
Image from Tim Lewis (@TimLewi53640836)
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How to ensure accountability for wrongful arms transfers? Join us in Geneva next Tuesday for a roundtable discussion on human rights impact assessments & due diligence in the firearms industry from a Latin American perspective. 🔗 Register here: docs.google.com/forms/d/1JNX…
Image from León Castellanos Jankiewicz (@leoncastjan)
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It's just one week until our Come & Sing Stanford Evensong with Orchestra at @CovCathedral, conducted by Nicholas Cleobury Hurry! - booking deadline is 24 Sep ow.ly/tNUf50TpjmM #ComeAndSing #StanfordEvensong #ChoralMusic #Stanford100
Image from RSCM Music Direct (@RSCMMusicDirect)
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Super interview with Nicholas Cleobury @NickCleobury, who conducts at our Come & Sing Stanford Evensong with Orchestra event on Saturday 28 Sept at @CovCathedral nitter.cf/CrossEyedPiano/status/… #ComeAndSing #StanfordEvensong #ChoralMusic #Stanford100
Fran Wilson 🎹🖋 (@CrossEyedPiano) profile pictureFran Wilson 🎹🖋
@CrossEyedPiano9 Sep 2024
"Hold our heads high. Classical music is not elitist, have better funding for better access, and don’t go in for “gimmicks”.  Let this great music speak for itself." #MeetTheArtist Interview with conductor Nicholas Cleobury @NickCleobury meettheartist.online/2024/09… via @crosseyedpiano
Image from Fran Wilson 🎹🖋 (@CrossEyedPiano)
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Our #Stanford100 celebrations continue... Sat 28 Sept: Come & Sing Stanford Evensong with Orchestra at @CovCathedral, directed by Nicholas Cleobury Why not come along and sing Stanford's magnificent music with us in an awe-inspiring setting? ow.ly/LlJV50TiPjj
Image from RSCM Music Direct (@RSCMMusicDirect)
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Simon Cleobury retweeted
JAM (@jamconcert_uk) profile picture
JAM@jamconcert_uk15 Sep 2024
#JAMontheMarsh VIRTUAL ends today! Time to highlight the piece that concluded Nicholas Cleobury's time as Festival Curator: Mahler's 4th Symphony Conducted by Nick & led by @IgorYuzefovich, the JAM Sinfonia superbly performed @IainFarrington's arrangement: jamconcert.org/?playlist=6c2…
Image from JAM (@jamconcert_uk)
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@"CELEBRATE CHARLES VILLIERS STANFORD"linkedin.com/pulse/celebrate… on @LinkedIn
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RSCM Centre (@RSCMCentre) profile picture
RSCM Centre@RSCMCentre13 Sep 2024
An unmissable opportunity to sing in the beautiful service of Choral Evensong, with orchestra, in the beautiful surroundings of @CovCathedral, with members of Coventry Cathedral Choir, directed by Nicholas Cleobury Sat 28 Sept from 1-5pm ow.ly/vKpb50TmK06 #Stanford100
Image from RSCM Centre (@RSCMCentre)
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Simon Cleobury retweeted
Just Security (@just_security) profile picture
Just Security@just_security5 Sep 2024
The Second @REAIMsummit starts in Seoul on Monday. Here’s what to know ahead of the multistakeholder summit on responsible #military #AI By Tobias Vestner @StanfordCISAC @TheGCSP and @simoncleobury #REAIM #ResponsibleAI ​​justsecurity.org/99831/reaim…

Putting the Second REAIM Summit into Context

What you need to know ahead of the multistakeholder summit on responsible military AI.

justsecurity.org
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Simon Cleobury retweeted
The GCSP (@TheGCSP) profile picture
The GCSP@TheGCSP27 Aug 2024
On Wednesday 21 August, the GCSP had the privilege to welcome the Hiroshima and Nagasaki Peace Messengers, a remarkable group of 22 Japanese high school students dedicated to advocating for a world without nuclear weapons.
Image from The GCSP (@TheGCSP)
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Come & Sing Stanford #Evensong with Orchestra @CovCathedral 28 Sept, directed by Nicholas Cleobury @NickCleobury Book by 30 Aug for #EarlyBird discount ow.ly/Qxfv50T19Jq #Stanford100 #ChoralMusic #ChoralEvensong #ComeAndSingEvents #CoventryCathedral
Image from RSCM Music Direct (@RSCMMusicDirect)
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Simon Cleobury retweeted
RSCM Centre (@RSCMCentre) profile picture
RSCM Centre@RSCMCentre24 Aug 2024
An unmissable opportunity to sing in the service of Choral Evensong with orchestra, in the equally beautiful surroundings of @CovCathedral, alongside members of Coventry Cathedral Choir, directed by Nicholas Cleobury Sat 28 Sept from 1-5pm ow.ly/wwLx50T25a3 #Stanford100
Image from RSCM Centre (@RSCMCentre)
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Simon Cleobury retweeted
The GCSP (@TheGCSP) profile picture
The GCSP@TheGCSP21 Aug 2024
The GCSP congratulates all States Parties, civil society, and industry on the 10th anniversary of the ATT coming into force. The GCSP has run an annual training course on the treaty and published articles with policy advice on treaty implementation. bit.ly/3AB4b0f
Image from The GCSP (@TheGCSP)
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Simon Cleobury retweeted
The GCSP (@TheGCSP) profile picture
The GCSP@TheGCSP19 Aug 2024
Dans un nouvel article dans @tdgch, @simoncleobury & Sir @LyallGrant réfléchissent à la manière dont le partage d'une compréhension des horreurs de la guerre pourrait aider à reconstruire ces relations. Article: bit.ly/3Arhnou Article en Anglais: bit.ly/4dOMisW
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Simon Cleobury retweeted
JAM (@jamconcert_uk) profile picture
JAM@jamconcert_uk14 Jul 2024
Thank you to Nicholas Cleobury and the JAM Sinfonia, led by @IgorYuzefovich, for a spectacular final #JAMontheMarsh concert! Beautiful performance of Mahler's 4th Symphony with Felicitas Wrede and @LiddellBiles' flute concerto with soloist @danjshao.
Image from JAM (@jamconcert_uk)
Image from JAM (@jamconcert_uk)
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