Managing Director, CEO

Dr Nathan Harman

BSc, BVMS (Hons), PhD

Nathan has a successful history in the Australian IT sector. He started Harman IT in 1997 and by 2001 had won the whole IT outsourcing for Hamersley Iron and grown staff numbers to 120. In 2001 Nathan sold Harman IT to the London-based multinational Marconi plc (Now Ericsson). In 2004 Nathan co-founded Zetta Group and has managed its growth since. Developing the Zetta Group of companies to a point where it is a significant exporter of services is a particular passion.

General Manager

Mark Vassallo

Mark leads our Services divisions which encompasses End User Computing, Data Centre, Managed Services, Project Management and Solutions Architecture teams. Mark began his IT career in 1995 and has a long history delivering managed services to large corporates. Mark has worked with Diageo, Woodside Energy, Rio Tinto, Marconi plc, and Coles Myer in roles ranging from systems analyst, solutions architect and account management.

Sales Director

Jim Di Menna

Jim is a seasoned executive with extensive experience in the ICT industry and a director of Zetta.

He has held senior positions with large IT multinationals including CSC, HDS and Fujitsu and is highly experienced in professional sales and in pursuing and successfully negotiating large scale ICT outsourcing contracts across Australia.

General Manager, People & Culture

Jennifer Gammie

Jennifer is a professional People & Culture Manager with both strategic and operational experience. At Zetta Group, Jenni has developed the maturity of recruitment, leadership and communication in particular.

Finance Manager

Andrew Speirs

Andrew is a CPA qualified Finance and Accounting leader with the ability to recognize process improvements and seek out innovative approaches. He combines 15 years retail management experience with over 15 years of international accounting experience.