Xaxis makes advertising more valuable for brands and their customers

Advancing our technology, data, and expertise to make programmatic media more effective and efficient.
Listening to clients, partners, and consumers so we can understand and adapt to their changing needs.
Developing truly accountable commercial models that demonstrate measurable results that prove the value of every programmatic investment.

How we make advertising better for brands and their customers

global connections
Establishing strategic partnerships with the world’s most influential companies.
advanced technology
Advancing our technology, data, and expertise to make programmatic media more effective and efficient.
Listening to clients, partners, and consumers so we can understand and adapt to their changing needs.
measurable results
Developing truly accountable commercial models that demonstrate measurable results that prove the value of every programmatic investment.
inclusive and innovative
Being proudly inclusive, collaborative, curious, and innovative.
Listening to clients, partners, and consumers so we can understand and adapt to their changing needs.
leadership team

Our leadership team’s knowledge and expertise allows us to embrace any challenge that comes our way

Nicolas Bidon

Global CEO
Nicolas Bidon is the global CEO of Xaxis, responsible for the overall company strategy and P&L across 47 markets in North America, Europe, Asia Pacific, Latin America and the Middle East and Africa.

Nicolas has been working at the intersection of data, media and technology for more than 20 years with tenures in San Francisco, London and Switzerland and is passionate about helping global brands leverage cutting-edge technology to achieve the desired outcomes from their digital media investments.

Arshan Saha

CEO, Asia Pacific
Arshan Saha is the CEO of Xaxis and GroupM Specialty Businesses, Asia Pacific. A senior member of the GroupM Asia-Pacific leadership team, Arshan leads GroupM’s data-driven specialty businesses. In his role, Arshan is responsible for Xaxis’ strategy, operations, and growth. These include client development, trading and partnerships, to providing the best programmatic media solutions across the region.

Gila Wilensky

President, U.S.
Gila Wilensky is President of Xaxis U.S., where she is focused on driving growth and transforming digital media into real business outcomes for brands.

Overseeing a deep pool of expert talent and product innovation across platforms and channels, Gila is a steward of the global company’s overall vision within the U.S. Since her arrival in June 2020, Gila’s proven experience inspiring positivity and holding teams accountable has helped to solidify Xaxis’ position as the leader in advanced programmatic media.

John Wittesaele

John is an experienced and proven leader in digital media and advertising thanks to his comprehensive knowledge and understanding of programmatic advertising.

As CEO EMEA, John leads Xaxis in 25 markets, formulating strategy and overseeing operations to deliver growth. He is an influential thought leader and frequent expert on topics such as AI and outcome-based marketing, regularly speaking at major industry events such as AdWeek Europe.

Juan Moronvelez

CEO, Latin America
Juan Moronvelez is CEO of Xaxis Latin America. Before joining Xaxis, Juan co-founded an array of diverse software development companies. He worked in different agencies in London before joining Xaxis and was responsible for opening the Colombia Xaxis Office in 2014. He then moved to a regional role in which he forged the different areas that support the company across the region, including trading, client development and partnerships. Juan is an enthusiast of MarTech, data management, and passionate about the outdoors. He has a Bachelors’ Degree in Business and Master’s in marketing. Juan is obsessed with helping brands achieve their goals, leveraging the best available technology and talent.

Silvia Sparry

Global COO
Silvia leads our global business operations team and is responsible for tools and platforms, operations, and technology. She also aligns our global, regional, and local supply path optimization and risk mitigation initiatives related to brand safety, fraud prevention, and data & privacy compliance, adhering Xaxis to the highest standards.

Silvia has a proven track record of driving positive change thanks to her strong vision and leadership skills, ability to pull teams together, and relentless focus on getting things done.

Mike Bevans

Global VP, Product Solutions, Marketing and Partnerships
Mike is responsible for leading the product solution and marketing teams and driving innovation globally. Mike brings over 17 years of industry experience across the consumer Internet and digital marketing solutions to Xaxis, including deep experience in programmatic platforms.

Prior to Xaxis, Mike led International Product Marketing and B2B Marketing teams at Yahoo focused on delivering solutions in the areas of Audience Targeting, Personalization, Creative Optimization and Insights and Analytics. Mike, who received his MBA from San Francisco State University, is based and lives in London with his family.

Sara Robertson

Global VP, Disruption
Sara Robertson is Global VP, Disruption at Xaxis. She is responsible for challenging the status quo, staying ahead of industry trends and helping to future-proof our business through careful stewardship of long-shot investments and experimental R&D. Sara also manages the development and success of Copilot, Xaxis’ proprietary artificial intelligence engine. Copilot has employed machine learning techniques to optimize 50k+ digital advertising campaigns across 47 countries, driving double-digit performance improvements for Xaxis clients. Prior to joining Xaxis, Sara managed the streaming and commerce platforms behind thousands of artists at Warner Bros Records, giving her the opportunity to party with rock stars like Metallica, Tom Petty, and My Chemical Romance.

Claire Kjaer-Nielsen

VP, Global People Lead
Claire Kjaer-Nielsen is VP,  global people lead at Xaxis and heads up our global strategy for employee recruiting, retention and development.

She is responsible for conceiving and developing talent management strategies for the group, which includes culture management, leadership development, and a diversity and inclusion program. Prior to Xaxis, she was human resources director at The Walt Disney Company, leading HR for the UK and was part of the EMEA marketing leadership team and the EMEA HR leadership teams, which worked across all Disney brands. 

Henry Stokes

MD, Global Clients
Henry is the Managing Director of Global Accounts at Xaxis where he leads a team that delivers programmatic strategy for some of the world’s largest advertisers. He has 17 years of experience in digital advertising and search marketing, and over 8 years in programmatic media.

Henry began his career at MediaVest before joining Mindshare where he ran the IBM and Nike digital accounts. He briefly left in 2005 to set up Circus Street, a consultancy & training business working for the likes of Nestle, ITV, Guardian, and Sky before rejoining Mindshare in 2009 as Head of Digital. In 2011 he moved to Groupm to lead client development for Xaxis UK. After two years of rapid growth, he repeated that success for Xaxis in Asia, successfully rolling out across 14 markets that saw 10x growth in five years.

With a passion for education and training, Henry delivered the digital marketing course for MsC students at the reputed CASS Business School in London.

Michel Gagnon

Global Managing Director, plista
Before joining plista, Gagnon worked for PwC both in Canada and Germany. In his last role he served as Manager Strategy Consulting in Berlin advising tech companies on their international expansion. He also acted as a Member of the Executive Committee of the Canada China Business Council and brings many years of experience in various strategy and international business development roles at Bombardier Inc.

Working with leading global agencies

As part of WPP and GroupM, we partner with best-in-class agencies across all communications, experience, commerce and technology disciplines.

See the results

Xaxis has transformed media into outcomes for some of the biggest global brands.
Case Studies

Want to learn more?

Get in touch to find out how outcome-driven media can deliver measurable results.
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