Qui sommes-nous?

Anne-Sophie de Lambertye is the Group Chief Financial Officer at Valiantys, where she has been instrumental in leading financial strategy, operational excellence, and transformative growth across global organizations. Her strategic vision and hands-on leadership strengthen financial frameworks and drive sustainable growth in complex, international environments. Prior to joining Valiantys, she held senior leadership roles including Group Finance Process Improvement Director at TechnipFMC, bringing over two decades of experience in financial transformation and process optimization. Her leadership continues to shape Valiantys’ financial strategy, positioning the company for continued global impact.

Dan Buffham serves as the Chief Information Officer at Valiantys, an Atlassian Platinum Solution Partner, bringing over 25 years of IT expertise and 16+ years specializing in the Atlassian tool stack. His extensive experience includes roles as CTO for Valiantys North America, Head of Professional Services and Delivery, and Atlassian Practice Manager at Appnovation, where he led global teams, architected solutions for Fortune 500 companies, and drove Agile and CI/CD transformations. With a passion for leading and scaling Atlassian practices, Dan excels in operations, business process improvement, and delivering innovative solutions that empower organizations and teams.

Anne-Sophie de Lambertye is the Group Chief Financial Officer at Valiantys, where she has been instrumental in leading financial strategy, operational excellence, and transformative growth across global organizations. Her strategic vision and hands-on leadership strengthen financial frameworks and drive sustainable growth in complex, international environments. Prior to joining Valiantys, she held senior leadership roles including Group Finance Process Improvement Director at TechnipFMC, bringing over two decades of experience in financial transformation and process optimization. Her leadership continues to shape Valiantys’ financial strategy, positioning the company for continued global impact.

Elizabeth Clor is the Chief Marketing Officer at Valiantys, where she leads the global marketing strategy and execution for the largest Atlassian solutions partner worldwide. With over 20 years of experience in B2B technology marketing, Elizabeth is known for driving growth, building high-performing teams, and delivering measurable business results for innovative technology companies. Prior to joining Valiantys, she served as CMO at Contegix, fueling double-digit growth and a successful acquisition, and held leadership roles at MicroStrategy, driving global marketing programs with a heavy focus on digital channels and marketing operations. Elizabeth’s leadership style blends strategic vision with data-driven execution, accelerating pipeline, brand visibility, and customer engagement.

Holly Mitchell is the Chief People Officer at Valiantys, where she shapes global HR strategies to foster a culture of innovation and employee engagement. In this role, she leads the company's global people and culture strategy, driving initiatives that foster a thriving people-first culture. Prior to Valiantys, Holly held multiple HR leadership positions at Capgemini and CDW UK (formerly Kelway), building a strong foundation in employee relations and talent development. Her CIPD qualifications and leadership expertise enhance Valiantys’ commitment to building high-performing teams.

Dimitri Spyridopoulos is the Executive Vice President & General Manager for APAC and acting Chief Solutions Officer at Valiantys, an Atlassian Platinum Solution Partner. With over 25 years of experience in technology leadership, Dimitri previously founded and led GLiNTECH, building it into a respected industry player over two decades. His extensive background spans executive management, software engineering, and consulting roles at organizations such as Oracle and Cross Border Exchange. Dimitri is known for driving innovation, operational excellence, and delivering transformative solutions for clients across the Asia-Pacific region.

Simon Phillips is the General Manager for EMEA at Valiantys, where he leads regional operations across sales, marketing, delivery, and support. With over 20 years of experience leading complex, multi-market teams in technology, consulting, and digital transformation, Simon is known for aligning business transformation with evolving client needs. Prior to Valiantys, he held global sales leadership roles at Falcon Group and spent over a decade at Capgemini, where he held multiple senior positions including UK Board Member and Head of Private Sector. Simon’s leadership is defined by a consistent track record of growth, innovation, and building multi-market teams in technology, consulting.

Israel serves the Executive Vice President and General Manager of Valiantys North America, leading the charge in driving innovation and growth through Atlassian-focused IT consulting solutions. Israel brings 25 years of Customer Success and Professional Services leadership experience. Most recently, Israel spent 12 years at Salesforce where he served as the Senior Vice President and General Manager of Salesforce’s Tech & Telco Professional Services vertical. Israel brings a wealth of enterprise Professional Services and scaled leadership experience to Valiantys where he continues his track record of building high-performing teams and driving incredible value with his customers.