Sydney cyber security

What drives security spending in Sydney. More regulated financial services sit in Sydney than anywhere else in the country, and that shapes every security conversation in the city. Banks, insurers, superannuation funds and the fintechs selling into them operate under APRA's expectations, and that pressure flows straight down the supply chain to anyone holding their data. If you have ever been sent a forty page vendor security questionnaire by a Sydney bank, that is why.

Sydney is also Australia's largest software market. For a SaaS business here, the security review is not a formality, it is the gate between you and the enterprise contract, and it is usually run by someone whose job is to find reasons to say no.

The frameworks that come up most.

• APRA CPS 234 for regulated entities, and increasingly for the third parties they rely on. If your customer is APRA-regulated, their obligations become your requirements by contract.
• SOC 2 for SaaS companies selling to Australian enterprise and into the United States. Type 1 answers the immediate question, Type 2 is what mature buyers eventually want.
• ISO 27001 where the buyer is Australian, European or government. It answers more procurement questions at once than anything else.
• PCI DSS for payments businesses, usually alongside one of the above rather than instead of it.
• Cyber Security Act 2024 ransomware payment reporting, which since 30 May 2025 requires businesses over $3 million turnover to report a payment to the Australian Signals Directorate within 72 hours.

The pattern we see in Sydney. Companies here tend to come to us later than they should, usually with a deal already sitting still in procurement and a security questionnaire they have half answered optimistically. That is recoverable, but it is more expensive and considerably more stressful than starting three months earlier. The follow-up questions are always harder than the first ones.

What we actually do. Web application, API, internal and external network and cloud penetration testing, and fixed-price compliance programmes that reach SOC 2 Type 1 at month four or ISO 27001 certification at month five. No day rates, no scope that quietly grows, and a retest included rather than sold to you as a surprise at the end.

CREST Accredited Penetration Testing in Sydney

Siege Cyber is a CREST-accredited company for penetration testing. The accreditation is assessed and held at company level and is verifiable on the CREST member register. In Sydney that matters most in financial services, where APRA CPS 234 expects testing to be carried out by appropriately skilled and functionally independent specialists, and an accreditation held at company level is the cleanest way to evidence it.

If penetration testing specifically is what you are shortlisting for, we have written a fuller guide to penetration testing in Sydney covering what APRA CPS 234 requires, the independence question, and what to ask a provider.

Where we are. We are based in Brisbane and work with Sydney clients remotely, attending on site where it genuinely helps rather than as a billable default. Same time zone for most of the year, same regulatory environment, and the people who do your testing are the people who write your report.