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Garrett O'Reilly

Operator

Garrett O'Reilly is the UK Chief Executive Officer of Hearts & Science, an Omnicom-owned data-driven marketing agency network.

Last updated Oct 7, 2026 by the ATDb Editorial Team

Role
UK Chief Executive Officer
Company
Hearts United
Connections
2

AI-drafted from public sources7 sources cited

Bio

Garrett O'Reilly is the UK Chief Executive Officer of Hearts & Science, an Omnicom-owned data-driven marketing agency network. The agency helps clients with personalized digital marketing through CRM, addressable channels, and real-time insights, operating out of 24 offices across 15 countries, with its headquarters in New York. O'Reilly joined the agency in 2017 as Head of Client Experience, having previously held roles at M2M as Managing Partner and at OMD UK as Associate Communications Planning Director. He holds MIPA accreditation and has completed all three IPA Professional Qualifications, including the Excellence Diploma, and serves on both the IPA Council and the IPA Membership Committee. Source 1: mrweb.com — Hearts & Science Promotes Garrett O'Reilly to UK CEO Source 2: campaignmediaawards.com — Garrett O'Reilly

Career

Roles with a cited source. All linked roles are in the Roles tab.

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