Board of Directors

Graham Lenzner


Non-Executive Chairman

Graham’s career spanned four decades, with particular emphasis on funds management and financial markets. Graham was an Executive Director of the Armstrong Jones Group for 12 years, the last four years as Joint Managing Director.  Other previous roles include Finance and Deputy Managing Director of Aquila Steel, General Manager Finance and Investments of MMI Insurance Limited and Director Head of Equities with Schroder Darling Management Limited.

Graham has served on the Board of a number of public and private companies. He is currently Chairman of Device Technologies Australia Pty Limited and an Independent Non-Executive Director of 360 Capital Group.

John Wilson


Managing Director & CEO

John has extensive international business experience, having spent most of his 20 year career developing global businesses across Asia, Europe and the US, with responsibility for establishing major strategic alliances and partnerships, and driving market entry strategies through new product innovation and commercialization. Previously, he worked for a major multinational manufacturing corporation in a range of senior executive roles.

As co-founder of TZ, John built the Company into a publicly listed, global technology brand before exiting in 2007. He returned in a consulting capacity to support the new TZ Board in 2011, before his return as CEO and Managing Director. Specializing in strategic business development, innovation management and product commercialization, he holds a post graduate qualification in International Marketing and an honors degree in Engineering.



Non-Executive Director

Thierry is a technology executive with more than 20 years’ international experience in business management, company turnaround and transformation. He built an accomplished career with billion-dollar technology company Ingenico, leading a diverse range of mandates across dynamically different regions and markets. Thierry has led culture and process change, while leveraging his strong foundation expertise in IT solutions delivery.

Thierry was successful at Ingenico in delivering revenue and profit growth through the creation of scalable, lean and efficient business models and engaged, empowered and high performing team environments. This accomplishment earned him industry recognition through receipt of ‘President of the Year’ Award by TMT News.



Non-Executive Director

Mario has 25 years of experience in the technology industry, across the networking, enterprise software, telecommunications, utilities and healthcare sectors. Mario founded Communications Australia (now Progility) in 2007. Under his leadership the company grew to more than 800 employees worldwide and approximately $150 million in revenue. Mario currently leads Big Switch Networks’ Asia Pacific operations.

Previously, Mario was a consultant for Juniper Networks and on the advisory board of Siemens Enterprise Communications. Mario was also an early employee of Cisco Systems in Australia, where he helped build the business from its start-up phase. He was later appointed director of channels, before leaving Cisco to found Savant Data Networks.