Consulting Manager
Current
Oct 2023 - Present
AeroLeads people directory · profile
John Harley Breen Email & Phone Number
Geopolitics and Strategy @ Sibylline Ltd
at
Sibylline Ltd
1 work email found
@sibylline.co.uk
LinkedIn matched
✓ Verified Jul 2026
4 data sources
Profile completeness 100%
Current company
Role
Geopolitics and Strategy @ Sibylline Ltd
Location
Dublin, County Dublin, Ireland
Company size
Who is John Harley Breen? Overview
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Quick answer
John Harley Breen is listed as Geopolitics and Strategy @ Sibylline Ltd at Sibylline Ltd, a with 68 employees, based in Dublin, County Dublin, Ireland. AeroLeads shows a work email signal at sibylline.co.uk and a matched LinkedIn profile for John Harley Breen.
John Harley Breen previously worked as Consulting Manager at Sibylline Ltd and Lead Consultant at Sibylline Ltd. John Harley Breen holds Master’S Degree from Queen Mary University Of London.
Company email context
Email format at Sibylline Ltd
This section adds company-level context without repeating John Harley Breen's masked contact details.
jbreen@sibylline.co.uk
79% confidence
AeroLeads found 1 current-domain work email signal for John Harley Breen. Compare company email patterns before reaching out.
Profile bio
About John Harley Breen
As consulting manager at Sibylline, I help clients manage geopolitical risks with confidence and insight. My role involves enhancing client resilience, leading and supporting Sibylline’s consultants and analysts, driving business development, and strengthening client relationships. I am a pragmatic and insightful leader who promotes integrity, staff development, and knowledge-sharing. This blend of collaboration, business development, and analytical insight has been pivotal throughout my career, delivering strategic advice and innovative solutions that enable decision-makers to navigate complex political and geopolitical landscapes.
Listed skills include International Relations, Foreign Policy, Human Rights, Policy Analysis, and 45 others.
Current workplace
John Harley Breen's current company
Company context helps verify the profile and gives searchers a useful next step.
Sibylline Ltd
12 roles
John Harley Breen work experience
A career timeline built from the work history available for this profile.
Lead Consultant
Jun 2021 - Oct 2023
Lead Analyst, Geopolitical Risk
Dec 2020 - Dec 2021
Intelligence Analyst
May 2020 - Nov 2020
Foreign Policy Consultant
Freelance
Jan 2020 - May 2023
Policy Advisor, Peace And Security
Sep 2019 - Dec 2019
Research Analyst, Department Of International Relations And Lse Saw Swee Hock Southeast Asia Centre
Mar 2017 - Jun 2019
Political Analyst
Freelance
Oct 2016 - Mar 2017
Policy Associate
Jan 2016 - Aug 2016
Advocacy Consultant
Cambodian League For The Promotion And Defense Of Human Rights (Licadho)
Jul 2014 - Apr 2015
Full-Time Masters Student - Ma International Relations
Sep 2012 - Sep 2013
Radio Producer And Researcher
Jul 2010 - Aug 2012
Team & coworkers
Colleagues at Sibylline Ltd
Other employees you can reach at sibylline.co.uk. View company contacts for 68 employees →
AS
Alanna Smart
Colleague at Sibylline LtdLondon, England, United Kingdom
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SA
Salman Arabi
Colleague at Sibylline LtdSpringfield, Virginia, United States
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TJ
Taylor Jones
Colleague at Sibylline LtdFort Washington, Maryland, United States
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CH
Caitlin Healing
Colleague at Sibylline LtdAustin, Texas, United States
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DC
Dante Christensen
Colleague at Sibylline LtdMundelein, Illinois, United States
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AQ
Aaron Qiao
Colleague at Sibylline LtdWashington, District Of Columbia, United States
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AR
Ashokkumar Raja
Colleague at Sibylline LtdChennai, Tamil Nadu, India
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RB
Rajib Barik
Colleague at Sibylline LtdChennai, Tamil Nadu, India
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HL
Haifeng Li
Colleague at Sibylline LtdAuburn, Washington, United States
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CR
Chris Reyes
Colleague at Sibylline LtdGlendale, Arizona, United States
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Alanna Smart
Colleague at Sibylline LtdLondon, England, United Kingdom
View →
SA
Salman Arabi
Colleague at Sibylline LtdSpringfield, Virginia, United States
View →
TJ
Taylor Jones
Colleague at Sibylline LtdFort Washington, Maryland, United States
View →
CH
Caitlin Healing
Colleague at Sibylline LtdAustin, Texas, United States
View →
DC
Dante Christensen
Colleague at Sibylline LtdMundelein, Illinois, United States
View →
AQ
Aaron Qiao
Colleague at Sibylline LtdWashington, District Of Columbia, United States
View →
AR
Ashokkumar Raja
Colleague at Sibylline LtdChennai, Tamil Nadu, India
View →
RB
Rajib Barik
Colleague at Sibylline LtdChennai, Tamil Nadu, India
View →
HL
Haifeng Li
Colleague at Sibylline LtdAuburn, Washington, United States
View →
CR
Chris Reyes
Colleague at Sibylline LtdGlendale, Arizona, United States
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2 education records
John Harley Breen education
Master’S Degree
Ba (Hons)
FAQ
Frequently asked questions about John Harley Breen
Quick answers generated from the profile data available on this page.
What company does John Harley Breen work for?
John Harley Breen works for Sibylline Ltd.
What is John Harley Breen's role at Sibylline Ltd?
John Harley Breen is listed as Geopolitics and Strategy @ Sibylline Ltd at Sibylline Ltd.
What is John Harley Breen's email address?
AeroLeads has found 1 work email signal at @sibylline.co.uk for John Harley Breen at Sibylline Ltd.
Where is John Harley Breen based?
John Harley Breen is based in Dublin, County Dublin, Ireland while working with Sibylline Ltd.
What companies has John Harley Breen worked for?
John Harley Breen has worked for Sibylline Ltd, Freelance, Permanent Mission Of Ireland To The United Nations, The London School Of Economics And Political Science (Lse), and Independent Diplomat.
Who are John Harley Breen's colleagues at Sibylline Ltd?
John Harley Breen's colleagues at Sibylline Ltd include Alanna Smart, Salman Arabi, Taylor Jones, Caitlin Healing, and Dante Christensen.
How can I contact John Harley Breen?
You can use AeroLeads to view verified contact signals for John Harley Breen at Sibylline Ltd, including work email, phone, and LinkedIn data when available.
What schools did John Harley Breen attend?
John Harley Breen holds Master’S Degree from Queen Mary University Of London.
What skills is John Harley Breen known for?
John Harley Breen is listed with skills including International Relations, Foreign Policy, Human Rights, Policy Analysis, Capacity Building, Public Policy, Diplomacy, and Foreign Policy Analysis.
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