Apolo Siskos

Director of Data Governance & Visualisation
10+ Years Exp
99% Compliance
40% Error Reduction
15+ Global Clients
London, UK
apolosisk@gmail.com
07519 773310
Use cases on request

Skill Map

Skill Map

Summary

Director of Data Governance & Visualisation with 10+ years of agency and brand experience building high-performing data teams, governance frameworks and reporting infrastructure for the world's largest media agencies and multinational advertisers.

Known for transforming analytics capability through taxonomy standardisation, measurement governance and advanced reporting architecture, delivering measurable client outcomes and trusted senior-level advisory.
BigQuery Datorama SQL Data Governance API Integration BI Dashboards

Experience

Data Governance & Visualisation Director – OMD EMEA
06/2021 – Present
  • Architected BigQuery-based reporting consolidating DV360, Meta and Google Ads using SQL allocation logic.
  • Designed global taxonomy frameworks using delimiters and lookup tables.
  • Achieved 99% data compliance and reduced reporting errors by 40%.
  • Led Datorama architecture, API integrations and analyst training.
  • Presented insights and optimisation recommendations to senior stakeholders.
Data Visualisation Director – Dentsu
03/2019 – 06/2021
  • Owned Datorama dashboard architecture for multinational clients.
  • Standardised naming conventions and governance models.
  • Implemented automated data quality and reconciliation workflows.
  • Delivered client training and optimisation frameworks.
Data Visualisation Specialist – Beamly (COTY)
06/2017 – 03/2019
  • Designed and delivered scalable BI dashboards and automation frameworks.
  • Automated data integration and reporting pipelines.
  • Built reusable dashboard templates accelerating delivery.
Data Visualisation Engineer – Datorama (Salesforce)
02/2016 – 06/2017
  • Consulted major agencies and brands on BI implementations.
  • Delivered platform integrations and UX-driven dashboards.
  • Supported enterprise POCs and internal tooling.

Early Career

Data Analyst
Havas Media Group (2015–2016)

Data Analyst
Crystaline Ltd (2015)

Consultant
Web Development & Marketing (2012–2015)

Education

BSc Computer Science (2:1)
Aristotle University of Thessaloniki, 2014

AI, Operations Research, Cognitive Science

Achievements

  • 99% data governance compliance delivered.
  • Global BI frameworks adopted across regions.
  • Product-level UX and scalability contributions.
  • Enterprise POCs and client growth support.