Jean-Guillaume Lamagnère

AI and application security for developers @ GitHub (Microsoft)

Amsterdam, North Holland, Netherlands

About

Currently Account Executive @ GitHub, helping developers to build, scale and deliver software securely. Former international athlete with living and working experiences in 6 different countries, I am highly challenge-driven. In addition to that, I am obsessed with building team synergies and meeting exciting individuals. Aspiring leader, I am convinced that positive energy is key to success in life and work. Along with accountability and resilience, I try my best to become 1% better everyday !

Experience

  • GitHub (1 yr 7 mos)
    • Account Executive - Digital Sales
      Apr 2026 - Present · 4 mos

      Q4 FY26 : 348%

    • Enterprise Business Representative
      Jan 2025 - Apr 2026 · 1 yr 4 mos

      GitHub is the Home of software developers. Q3 FY25 : 100% (draw) Q4 FY25 : 155% Q1 FY26 : 165% Q2 FY26 : 216% Q3 FY26 : 154%

  • Rubrik ()
    • Senior Enterprise SDR
      Feb 2024 - Dec 2024 · 11 mos

      FY23: 125% FY24: 135% FY25 : 110%

    • Enterprise SDR
      Sep 2022 - Feb 2024 · 1 yr 6 mos

      Rubrik, the Zero Trust Data Security Company™, delivers data security and operational resilience for enterprises. Rubrik’s big idea is to provide data security and data protection on a single platform, including Zero Trust Data Protection, ransomware investigation, incident containment, sensitive data discovery and orchestrated application recovery. Top Achiever France FY24

  • EMEA Direct Store Business Development at Nike
    Sep 2021 - Aug 2022 · 1 yr

    End to end project management of strategy deployment initiatives within the whole EMEA Geography, coordinating cross-functional teams with internal and external stakeholders. Drive process improvement initiatives within the Nike Direct Stores department and drill down into performance gaps to identify areas for improvement. Report creation for business results with a focus on Membership KPIs and present findings to leadership. Significative achievements : • Organized EMEA-wide campaign generating 2.5m € uplift and 201k units within 200+ stores, coordinating 16 different teams in restricted timeline (5 weeks). • Designed and implemented process improvement framework in 200+ partnered stores across EMEA and collaborating with notable partners such as Percassi, Fox, Belep, etc…

  • Junior Marketing Project Manager at Carrefour Belgium
    Aug 2019 - Feb 2020 · 7 mos

    Co-management of local operations for Carrefour Belgium's 40 Hypermarkets and concept stores by handling the marketing and communication strategy. Co-leading of the re-openings of several Hypermarkets in Belgium with a budget ranging from 35 to 65 000€. Creation of the marketing and communication strategy of several concepts stores for Carrefour Belgium including the first Carrefour City. Therefore leading the operational management related to these strategies.

  • Marketing and Business Development Officer at BtoTree
    Feb 2019 - Aug 2019 · 7 mos

    The world's future premier B2B market community. https://www.btotree.com/ - Business development for new prospects. - Creation of marketing campaigns online and offline. - Support the field sales and marketing organizations on marketing initiatives. - Support online campaigns and monitor their performance and return on investment. - Create effective search engine and optimize marketing material for the website.