Marek Serzeniewski
@marekserzeniewski
I build technology programmes and operations that help international businesses scale.
United KingdomWhat I'm looking for
At Secret Escapes Group, I designed the first Technology Programme Office and govern a £30m+ change portfolio across 10 markets. I lead enterprise change from C-level strategy through delivery, benefits tracking and operational handover.
I led Salesforce Sales Cloud transformation work spanning 3,000+ deals, delivered hiBob across 10 entities, and reduced manual device administration by 90% through Microsoft Intune deployment. I also built GAIA, a Google Gemini-based AI assistant, and founded the group’s AI Community of Practice.
Earlier, I grew OTA revenue by 50% (£6.8m), scaled booking-system throughput fivefold, and ran in-destination operations for 45,000+ passengers annually. I bring hands-on commercial, operational and programme leadership experience to complex international change.
Experience
Work history, roles, and key accomplishments
Senior Operational Project Manager
Secret Escapes Group
Oct 2020 - Present (5 years 11 months)
Designed the group's first Technology Programme Office and led major transformation programmes including Salesforce Sales Cloud, Microsoft Intune zero-touch deployment, and HRIS replacement across 10 markets.
Head of Tour Operator Operations
Secret Escapes Group
Feb 2016 - Oct 2020 (4 years 8 months)
Owned the end-to-end package holiday manufacturing cycle, managed SaaS platform selection and rollout, and scaled cross-departmental policies to support rapid growth.
Commercial Manager
Secret Escapes Group
Jun 2014 - Feb 2016 (1 year 8 months)
Managed supply pipeline and account performance for third-party tour operator suppliers, converting underperforming accounts into high-revenue partnerships and launching analytics dashboards.
National Account Manager
Monarch Travel Group / Cosmos Tours & Cruises / Avalon Waterways
Apr 2012 - May 2014 (2 years 1 month)
Managed top OTA partnerships across three brands, grew revenue by 50% (£6.8m) in one year, and led delivery of the group's first trade-bookable B2B website.
Commercial Aviation Executive
Cosmos Tours & Cruises / Avalon Waterways
Nov 2010 - Apr 2012 (1 year 5 months)
Managed airline partner contracts, fare allocation, and load factor performance using Amadeus and Galileo GDS, consistently exceeding 90% load factor targets.
Overseas Area Manager
Monarch Holidays
Apr 2006 - Oct 2010 (4 years 6 months)
Directed in-destination operations across three regions totalling 45,000+ passengers annually, managed dispersed teams, and served as incident commander for emergencies.
Assistant Manager
The White Horse / Premier Inn
Oct 2000 - Apr 2006 (5 years 6 months)
Managed daily hospitality operations including team leadership, budget management, and guest experience across front-of-house and back-office functions.
Education
Degrees, certifications, and relevant coursework
Northeastern University London
Bachelor of Science, Project Management with Digital Technologies
Grade: First Class Honours
BSc (Hons) Project Management with Digital Technologies, First Class Honours, completed as a Level 6 Degree Apprenticeship.
Association for Project Management
APM Project Management Qualification (PMQ), Project Management
APM Project Management Qualification (PMQ), internationally recognised equivalent to PMP / PRINCE2 Practitioner.
Tech stack
Software and tools used professionally
Availability
Location
United KingdomAuthorized to work in
Salary expectations
Social media
Skills
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