ISDefence is South Australia’s Premier Independent Business Resilience Company.

Our capabilities in the disciplines of Cyber Security, Information Security, Business Continuity, IT Continuity, Disaster Recovery, Privacy and Risk enable us to place your business at the centre of the risk equation, then design and deliver projects from within these fields and when required by using a multidiscipline approach.

The value in our approach cannot be understated because it allows us to design the right projects that maximise business value, without being restricted by one industry priority or lens over another.

Ultimately, we help our clients protect their business and secure their opportunities for future success.

Our independence is a guarantee of our desire to remain grounded in integrity, honesty and open mindedness. This allows us to begin new relationships from a position of trust.

ISDefence is led by Yvonne Sears MSc LLM FIP. Yvonne has been a recognised Industry leader for many years. She has been a frequent presenter at industry conferences and holds multiple industry awards. Yvonne has been a visionary for ISDefence and has successfully transformed and matured many of Australia’s and Europe’s largest organisations over the past 20 years.

Yvonne’s leadership, mentorship and industry credibility has been at the core of our ability to attract, hire and retain the calibre and quality of industry professionals that make up our team at ISDefence.

Grant Hughes as the Commercial Director has the core responsibility for business growth and has managed to establish a presence on federal, state and local government panels right across the country, and has managed to build relationships with 10 of the largest 25 organisations in South Australia and with many national based organisations in the enterprise space to grow ISDefence from three people to one of the largest teams in South Australia.

The true measure of our success has been in our ability to build our team and attract some of the most talented and brightest people in the industry.

Setting aside qualifications and experience, when we hire we remind ourselves that we are a values based organisation, therefore we gauge all candidates based on a criteria of shared values, passion for their industry and irrespective of their experience level, their potential and drive to one day become an expert in their field. We believe that diversity in thinking enhances innovation and productivity exponentially.

We strive for excellence and we achieve this through; continual improvement, quality management, investment in our people and not being afraid of change as these are all vital aspects in achieving this goal.

Excellence begins with leadership, as leaders we hold ourselves accountable to our shared values of integrity and passion for our industry, our team and our clients.


Yvonne Sears
Yvonne SearsManaging Director
Grant Hughes
Grant HughesDirector
Amit Malhotra
Amit MalhotraHead of Operations
Brad Townsend
Brad TownsendSenior Security Consultant
Damien Stone
Damien StoneSecurity Consultant
William Ng
William NgTechnical Security Consultant
Tayana Pannu
Tayana PannuSecurity Consultant
Nikala Georgiou
Nikala GeorgiouFinance Manager
Jo SilverExecutive Assistant
Rey GomezSenior Technical Consultant
Patricia OrtizConsultant
Charles Yang FuConsultant


Certification may be unnecessary for your organisation. However, standards are created as a best practice which offers you an assurance. 

Information Security

ISO27001  Information Security Management System

ISO27000 Series  Information Security – Supporting Guides

ISO 27005  Information Security Risk Management


PCI DSS  Payment Card Industry Data Security Standard

ISO 27035   Information Security Incident Management

BS ISO/IEC 19770-1:2017   IT asset management. IT asset management   systems. Requirements

ASD Essential Eight

Business Continuity

ISO22301  Business Continuity Management System

ISO 27031  IT Readiness for Business Continuity


GDPR  General Data Protection Regulations

Australian Privacy Law

ISO 27701  Extension to ISO/IEC 27001 and ISO/IEC 27002 for   privacy information management — Requirements   and guidelines


ISO 31000  Risk Management

ISO 15489  Records Management 

ISO 9001  Quality Management System


ISO 20000  Service Management