About Us

OSI Security was founded early in 2010 in Sydney, Australia by Information Security researcher Patrick Webster. Well known in the global Information Security community and actively providing commercial penetration testing since 2001, Patrick has contributed to security projects such as Tenable Nessus, the Metasploit Framework and OSVDB (Open Source Vulnerability Database) and draws upon a broad experience of hands-on IT skills gained in IT operational and analytical roles for start ups and leading Australian security companies, government and law enforcement agencies.
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• Our primary services include monthly penetration testing, security auditing, web application security testing and risk management.
• We are trusted by hundreds of organisations throughout Australia to detect and eliminate risk and vulnerabilities, from the small businesses to government and ASX listed blue chip multinationals.
• Having performed over 1,000 penetration tests spanning 2 decades, we have discovered and (as-appropriate) reported a vast number of issues across all vulnerability classes and software and hardware appliance products to ensure our clients are protected against exploitation.

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​Our namesake is the OSI model which describes the abstraction layer of computing - from physical hardware, operating systems, networking, applications to the people and policies which operate the technology. Likewise, we provide services, solutions and advice to cover all security aspects of the OSI layer.

We provide vendor neutral and independent advice to small-medium business, corporate enterprise, financial services, government and not-for-profit organisations.
OSI Security offers a full range of security services that encompass the auditing process through to intensive penetration testing and design, consulting and comprehensive support.

We are approved suppliers for contract panels such as the New South Wales, Victoria, Queensland and New Zealand government departments.

The Team

• Patrick​
• Lawrence
• Simon
• Matthew