Stylianos Matthaiou
London
Summary
Accomplished marketing leader with expertise in global marketing leadership, digital transformation, and AI & analytics. Demonstrates a proven track record of driving revenue growth through performance marketing, strategic partnerships, and multi-channel campaigns. Skilled in P&L and budget oversight, team building and leadership, as well as managing change and transformation to deliver impactful business outcomes. Committed to leveraging innovative strategies to foster organisational growth and success.
Overview
26
26
years of professional experience
2012
2012
years of post-secondary education
1
1
Certification
Work history
Senior Director, Global Performance Marketing
Convatec
01.2025 - 09.2025
- Led a $45M global marketing budget ($19M A&P) across 40+ markets in US, UK and Europe (central + local teams).
- Connected with local markets to collectively forge our GTM plan across the full funnel.
- Built a central multidisciplinary hub (Integrated Marketing, Ops/Tech, Analytics, Insights, Web, Social, Influencers) to centralise fragmented local activity.
- Centralised performance measurement and delivered optimisation insights that delivered incremental ROI from day 1.
- Directed global campaigns (Healthy Bonds, Me+ Showcase, Esteem Body, Esenta Rebrand), delivering measurable funnel and brand impact.
- Standardised processes across channels, MRL, onboarding, and training, cutting duplication and improving speed-to-market.
- Owned the CRM and the nurturing journeys and built/optimised 14 journeys to improve lead generations and patient/HCP experience.
- Reshaped the organisation by hiring new skillsets (performance, analytics, channel expertise), elevating marketing maturity.
- Piloted a community-led influencer and affiliate model in Brazil that significantly outperformed traditional paid channels.
Global Director, Marketing & Commercial Strategy
Expedia Group
10.2022 - 11.2024
- Acted as Chief of Staff to SVP B2B Marketing, steering global marketing programs.
- Established the Connectivity Marketing team, optimising growth/product marketing for partners managing 90% of revenue.
- Executed Go-to-Market strategies, generating $150M incremental revenue.
- Launched multi-channel campaigns that doubled conversion, adding £120M revenue.
- Rebuilt content, SEO, and paid media campaigns to deliver +15% ROI.
- Developed 2024–2026 Growth Marketing strategy, integrating sales, marketing, and digital, driving scalable revenue growth.
Global Director, Strategy & Transformation
Expedia Group
01.2020 - 10.2022
- Built and led a team of strategists, insights, pricing, and analytics experts.
- Designed a loyalty program that increased deal adoption by 30%.
- Implemented long-tail marketing automation, generating $280M revenue in 3 years.
- Equipped Account Management teams with prioritisation tools, improving success rates of high-value opportunities by 54%.
- Drove a multi-channel transformation, automating 35% of outreach.
- Streamlined units and workforce, delivering $12M in operational savings.
Director-Level Consultant, Consumer Products & Retail
EY & IBM
01.2019 - 12.2019
- Delivered turnaround and growth projects across CPG, retail, and healthcare.
- Strengthened client capabilities in revenue management, commercial strategy, and operational efficiency.
Head of Consumer Selling & Operations
eBay
08.2015 - 11.2018
- Managed a £353M P&L, driving $4B in platform sales; added $1.5B GMV through acquisition and category launches.
- Directed cross-functional team of 35+ in Marketing, BD, Product, and Ops.
- Launched 3 new categories, generating $95M GMV in 12 months.
- Introduced Agile in commercial ops, cutting time-to-market by 22%.
- Ran flagship campaigns (Black Friday +31% YoY, $15.4M uplift).
- Pioneered UK Social Selling and eBay Local, transforming C2C engagement.
- (Encompassing roles as Head of Consumer Selling, Head of Operation & Innovation, Head of Marketing, and Trading Marketing Programmes)
Digital Product Management & Commercial Strategy
Dixons Carphone Group
03.2014 - 08.2015
- Led the implementation of the Pin-Point project for Carphone Warehouse, enhancing customer experience through optimized digital customer journeys.
- Managed a £14M CAPEX and OPEX budget, balancing investments in digital and in-store improvements.
- Powered the performance across 1,053 UK stores, achieving improvements in NPS, MPU, conversion rates, and adoption metrics.
- Project-managed the PAYM customer journey, boosting NPS by 15 points and surpassing conversion targets, resulting in a £1M increase in annualized EBITDA.
Chief of Staff to the CCO
Pelican Rouge Group
02.2013 - 03.2014
Projects and Contracts
Lloyds Pharmacy, Samsung Electronics, Procter & Gamble
03.2012 - 02.2013
MD / Founder
Core Advertising
09.2008 - 03.2012
Various Commercial Roles
Ekona - Imaging Solutions
08.1999 - 05.2009
Education
MBA -
Athens University of Economics and Business
BSc - Business Administration
University of Piraeus
Skills
- Global Marketing Leadership
- Digital Transformation
- AI & Analytics
- Revenue Growth
- Performance Marketing
- Strategic Partnerships
- P&L & Budget Oversight
- Multi-channel Campaigns
- Team Building & Leadership
- Change & Transformation
Websites
Certification
- CIMA / CGMA
- Six Sigma
- APMP
Hobbies and Interests
Travelling, Skiing, Mentoring
SOCIAL LINKS
LinkedIn profile: www.linkedin.com/in/smatthaiou
Affiliations
- Skiing, Travelling, Reading
Timeline
Senior Director, Global Performance Marketing
Convatec
01.2025 - 09.2025
Global Director, Marketing & Commercial Strategy
Expedia Group
10.2022 - 11.2024
Global Director, Strategy & Transformation
Expedia Group
01.2020 - 10.2022
Director-Level Consultant, Consumer Products & Retail
EY & IBM
01.2019 - 12.2019
Head of Consumer Selling & Operations
eBay
08.2015 - 11.2018
Digital Product Management & Commercial Strategy
Dixons Carphone Group
03.2014 - 08.2015
Chief of Staff to the CCO
Pelican Rouge Group
02.2013 - 03.2014
Projects and Contracts
Lloyds Pharmacy, Samsung Electronics, Procter & Gamble
03.2012 - 02.2013
MD / Founder
Core Advertising
09.2008 - 03.2012
Various Commercial Roles
Ekona - Imaging Solutions
08.1999 - 05.2009
BSc - Business Administration
University of Piraeus
MBA -
Athens University of Economics and Business