Guillaume Marion

About

I build the systems that turn a target market into qualified pipeline.As a GTM Engineer at Player One Labs, I own the outbound machine end to end: sourcing companies and contacts from public data, running cost-efficient enrichment waterfalls, segmenting markets into prioritized target lists, and launching automated campaigns across multiple brands. Where most go-to-market work is manual and repeated by hand, I build re-runnable systems that do it at scale and measure themselves.My edge is seeing both sides of the revenue equation. Alongside the engineering, I lead Finance and Strategy at Player One Labs, with a background in private debt at Pictet Group and a Master's in Finance from City, University of London. So I treat pipeline like a P&L: a cost-efficiency problem, not just a volume one.I've also lived and studied across Europe and Asia, from Mandarin in Taiwan to international business programs in Hong Kong. That gives me a real feel for how different markets buy, and I'm comfortable working across markets. Always happy to compare notes with people working on outbound, automation, and revenue operations.Core focus: GTM engineering · outbound automation · data sourcing & enrichment · ICP design & segmentation · campaign operations & deliverability

Company history

1. 
   KCL Business ClubTreasurer Associate - King's College London Business Club (KCLBC)2017-10 – 2018-05 · 7 mo
2. 
   Pictet GroupPrivate Debt Intern2023-09 – 2023-12 · 3 mo
3. 
   Player One LabsGTM Engineer2026-04 – present · 4 mo
4. 
   AmundiHuman Resources Intern2017-08 – 2017-08 · 0 mo
5. 
   HOME Fundraising LtdPart Time Fundraiser2018-03 – 2018-04 · 1 mo
6. 
   King's Business SchoolStudent Representative2017-10 – 2018-05 · 7 mo
7. 
   Player One LabsResponsable Finance et Stratégie2025-09 – present · 11 mo
8. 
   Mike OllefsPart Time Fundraiserunknown – present
9. 
   Go To Market EngineeringPart Time Fundraiserunknown – present
10. 
    No-company. (Self-employed.)Part Time Fundraiserunknown – present

Skills

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