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Simon Michaelides

Standards Setter

Simon Michaelides is a prominent voice in UK advertiser advocacy, working at ISBA (Incorporated Society of British Advertisers) to champion the interests of major brand advertisers in navigating the complexities of modern digital advertising. He is closely associated with ISBA's landmark Programmatic Supply Chain Transparency Study, a groundbreaking piece of research conducted in partnership with PwC and the AOP that exposed significant inefficiencies and 'unknown deltas' in the programmatic ecosystem, influencing industry-wide conversations about accountability and reform. At ISBA, Michaelides has been instrumental in translating complex AdTech dynamics into actionable guidance for brand advertisers, helping them better understand where their media budgets flow and how to demand greater transparency from agency and technology partners. His work spans programmatic trading, media auditing frameworks, identity solutions, and the evolving privacy landscape, positioning him as a trusted resource for ISBA's membership of leading UK and multinational advertisers. His career reflects a deep commitment to the buy-side perspective in AdTech, advocating for standards and practices that protect advertiser investment and improve the overall health of the digital advertising ecosystem. He regularly engages with industry bodies, contributes to working groups, and speaks at industry events on topics ranging from supply path optimization to the deprecation of third-party cookies.

Last updated Aug 14, 2026 by ATDb automated enrichment · Connections updated Aug 17, 2026

Role
Head of Media and AdTech
Company
ISBA
Based
London, United Kingdom
Connections
1
Years in industry
15 years

Bio

Simon Michaelides is a prominent voice in UK advertiser advocacy, working at ISBA (Incorporated Society of British Advertisers) to champion the interests of major brand advertisers in navigating the complexities of modern digital advertising. He is closely associated with ISBA's landmark Programmatic Supply Chain Transparency Study, a groundbreaking piece of research conducted in partnership with PwC and the AOP that exposed significant inefficiencies and 'unknown deltas' in the programmatic ecosystem, influencing industry-wide conversations about accountability and reform. At ISBA, Michaelides has been instrumental in translating complex AdTech dynamics into actionable guidance for brand advertisers, helping them better understand where their media budgets flow and how to demand greater transparency from agency and technology partners. His work spans programmatic trading, media auditing frameworks, identity solutions, and the evolving privacy landscape, positioning him as a trusted resource for ISBA's membership of leading UK and multinational advertisers. His career reflects a deep commitment to the buy-side perspective in AdTech, advocating for standards and practices that protect advertiser investment and improve the overall health of the digital advertising ecosystem. He regularly engages with industry bodies, contributes to working groups, and speaks at industry events on topics ranging from supply path optimization to the deprecation of third-party cookies.

Career

  • Media and AdTech roles

    Various (prior to ISBA) · pre-2018

Expertise & education

Expertise

Programmatic AdvertisingSupply Chain TransparencyMedia AuditingBuy-Side AdvocacyIdentity ResolutionThird-Party Cookie DeprecationSupply Path OptimizationBrand Safety

Speaking topics

Programmatic supply chain transparencyAdvertiser accountability and media auditingIdentity solutions and cookie deprecationBuy-side best practices in digital advertisingSupply path optimization

Recognition

Notable achievements

  • Key contributor to ISBA's landmark Programmatic Supply Chain Transparency Study with PwC and AOP, which revealed significant undisclosed costs in programmatic supply chains
  • Developed guidance and frameworks helping ISBA member advertisers demand greater accountability from agency and AdTech partners
  • Represented advertiser interests in industry working groups addressing cookie deprecation and privacy-preserving advertising technologies

Publications

  • ISBA Programmatic Supply Chain Transparency Study (contributor, with PwC and AOP)
Connection details