Michael Passias

Marketing & Business Development leader with 5+ years scaling e-commerce and performance marketing. Delivered 20%+ YoY revenue growth and improved paid media ROAS by 35% through data-driven acquisition and CRO. Experienced managing cross-functional teams and aligning marketing KPIs with financial goals.

Head of Marketing at Excelsia Labs (2025-04 – Present)

Lead corporate marketing and business development strategy

• Lead corporate marketing and business development strategy
• Implemented GA4 + GTM tracking and weekly dashboards to align marketing KPIs with CFO targets, improving forecasting accuracy
• Align KPIs with financial and strategic business goals

Freelance Digital Marketing Consultant (Part-Time) at Self-Employed (2022-09 – 2025-09)

Freelance digital marketing consulting for multiple brands

• Developed full-funnel strategies for 10+ brands across e-commerce and retail sectors
• Managed Google Ads, SEO, and performance campaigns improving conversions
• Delivered measurable growth in traffic, engagement, and sales

Airbnb Portfolio Manager (Part-Time) at Self-Managed (2022-09 – 2025-09)

Managing Airbnb portfolio with strategic pricing optimization

• Achieved 20% year-over-year revenue growth through strategic pricing

Shift Leader at LPP S.A (2024-06 – 2024-09)

Store operations and team leadership

• Analyze Power BI datasets and generate detailed reports to support data-driven decision-making
• Supervised and coached a team of 15 employees, optimizing store operations and team performance

Section Manager at Marks & Spencer (2023-11 – 2024-06)

Store section management and team supervision

• Supervised and mentored a team of 15 employees, ensuring efficient store operations
• Leverage Power BI to analyze datasets and produce comprehensive reports that support strategic business decisions

Deputy Head of Marketing (Part-Time) at Zeedimension (2022-12 – 2023-11)

Digital marketing strategy and team management

• Supported digital marketing strategy and campaign execution while managing a global team of 50 employees
• Contributed to rapid expansion scaling operations to 40 companies and 3,000 employees within 3 months
• Increased revenue by up to 15% through optimized marketing and operational strategies

Manager of E-shop & Online Ads at Baousis Bros (2022-12 – 2023-11)

E-commerce and online advertising management

• Managed e-commerce platforms and paid advertising campaigns
• Managed a team of 10 employees across multiple sales channels
• Improved sales performance through ad optimization and data analytics while managing advertising budgets of up to €10K

Technical Specialist (Apple Support) at Teleperformance (2022-07 – 2022-10)

Technical customer support

• Improved customer satisfaction by 20% through effective technical support

Sales Associate at Cosmos Sports (2021-12 – 2022-07)

Sales operations

• Consistently exceeded monthly sales targets

Marketing & Business Administration Intern at Viosal (2013-09 – 2017-07)

Marketing and administrative support

• Supported marketing and administrative operations improving efficiency

Master's in Digital & Social Media Marketing – University of East London (2021-09 – 2022-07)

Bachelor's in Financial Studies – Kapodistrian University (2014-09 – 2020-07)