Who is the CTO of Xero in 2026? Diya Jolly's Bio

Date
April 15, 2026
Xero

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Xero

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Mark Rees

Title

CTO

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https://www.linkedin.com/in/diyajolly

Mark Rees
mark.rees@xero.com

Mark Rees is the Chief Technology Officer (CTO) at Xero, a leading cloud-based accounting software platform. He is responsible for driving Xero’s global technology strategy and ensuring the company’s platform remains innovative and operationally excellent. With a background that includes roles at Microsoft New Zealand and Trade Me, Rees brings a wealth of experience to his position at Xero.

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Who is the CTO of Xero?

Mark Rees, the Chief Technology Officer at Xero, has a rich background in both academia and the tech industry.. Before joining Xero, Rees served as the Chief Technology Officer at Microsoft New Zealand and the Chief Product and Technology Officer at Trade Me. His role at Xero involves driving the company's global technology strategy, fostering innovation, and ensuring operational excellence.

Additionally, he supports world-class talent across various teams, including platform, security, data, engineering, and architecture.

Work History

Mark Rees has an extensive work history that spans various prestigious institutions and roles. Here is a summary of his previous positions:

  • University of Canterbury - PhD in Chemistry (1995 to 1998)
  • Technische Universiteit Eindhoven - Postdoctorate Research Fellow in Chemistry (1998 to 1999)
  • University of Canterbury - Bachelor of Science (BSc) Hons (1st class) in Chemistry (1993 to 1995)

Education History

Mark Rees has a robust educational background that laid the foundation for his illustrious career in technology. He earned his PhD in Chemistry from the University of Canterbury, where he also completed his Bachelor of Science (BSc) with first-class honors in Chemistry. His academic journey further extended to the Technische Universiteit Eindhoven, where he served as a Postdoctorate Research Fellow in Chemistry. This strong academic grounding in the sciences has undoubtedly contributed to his analytical and strategic approach in various high-profile technology roles.

When did Mark Rees join Xero?

Mark Rees joined Xero as the Chief Technology Officer (CTO) in 2019. Since then, he has been instrumental in driving the company's global technology strategy and fostering innovation. With a tenure spanning over four years, Rees has significantly contributed to Xero's growth and technological advancements. His leadership has been pivotal in maintaining the company's operational excellence and supporting world-class talent across various teams, including platform, security, data, engineering, and architecture.

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