The new director has extensive experience in investment, management and investment banking and is a qualified chartered accountant.
He worked in Hong Kong and Singapore for 15 years before returning to Australia in 1992.
Chairman Uwe Boettcher said: “I welcome Chris to the XTEK board and look forward to working with him.
“His experience and contacts will be a great asset to the company."
Fullerton is an investor in listed equities and private equity, and has been a non-executive director of a number of ASX-listed companies.
XTEK is a leading company in the Australian homeland security market.
Its knowledge and expertise is focused on the delivery of protection and sustainment solutions for the government, law enforcement, military and commercial sectors.
The supply and maintenance of Small Unmanned Aerial Systems (SUAS) is a major focus.
XTEK has developed a range of new technologies which it is commercialising for the international market.