# Core Sentinel > Core Sentinel is a Sydney-based, Australia-wide penetration testing company. Every engagement is delivered by a senior, OSCE/OSCP-certified tester - fixed-price quotes, manual exploitation (never scan-and-send), a prioritised report, and a free remediation retest with a letter of attestation. Key facts: - Founded and operated from Sydney, Australia (Governor Phillip Tower, 1 Farrer Place, Sydney NSW 2000); serves all of Australia and remote engagements worldwide. - Senior-only testing: 20+ years experience, 30+ professional certifications, OSCE / OSCP certified; founder has additionally completed CREST certification. - Fixed-price engagements quoted up front from scope; free re-test after remediation. - Compliance-mapped testing for the Essential Eight, ISO 27001, SOC 2, APRA CPS 234, PCI DSS, IRAP, the SOCI Act and ST4S. - Contact: 1300 859 443 (+61 1300 859 443) · info@coresentinel.com · ABN 51 611 410 658. ## Penetration testing services - [Penetration Testing Australia](https://www.coresentinel.com/penetration-testing-australia/): National overview - services, methodology, compliance mapping, engagement process and FAQs. - [Penetration Testing Services](https://www.coresentinel.com/services/): The full service catalogue. - [Web Application Penetration Testing](https://www.coresentinel.com/services/web-application-penetration-testing/): OWASP-aligned manual testing of web apps and APIs. - [Mobile Application Penetration Testing](https://www.coresentinel.com/services/mobile-application-penetration-testing/): iOS and Android app and backend testing. - [Internal Penetration Testing](https://www.coresentinel.com/services/internal-penetration-testing/): Assumed-breach testing inside the network, including Active Directory. - [External Infrastructure Penetration Testing](https://www.coresentinel.com/services/external-infrastructure-penetration-testing/): Internet-facing infrastructure and perimeter testing. - [Wireless Penetration Testing](https://www.coresentinel.com/services/wireless-penetration-testing/): On-site Wi-Fi and wireless infrastructure testing. - [Professional Services](https://www.coresentinel.com/services/professional-services/): Red teaming, advisory, code review and social engineering. ## Locations - [Penetration Testing Sydney](https://www.coresentinel.com/penetration-testing-sydney/): Sydney-based testing - our home city, with in-person scoping and on-site work across Greater Sydney. - [Penetration Testing Melbourne](https://www.coresentinel.com/penetration-testing-melbourne/): Engagements for Melbourne and Victorian organisations, remote or on-site. - [Penetration Testing Brisbane](https://www.coresentinel.com/penetration-testing-brisbane/): Engagements for Brisbane and Queensland organisations, remote or on-site. - [Penetration Testing Adelaide](https://www.coresentinel.com/penetration-testing-adelaide/): Engagements for Adelaide and South Australian organisations, including defence supply chain. - [Penetration Testing Perth](https://www.coresentinel.com/penetration-testing-perth/): Engagements for Perth and Western Australian organisations, remote or on-site. ## Compliance guides - [Penetration Testing for Compliance in Australia](https://www.coresentinel.com/penetration-testing-compliance-australia/): Is penetration testing mandatory? How Essential Eight, ISO 27001, APRA CPS 234, PCI DSS, SOC 2, IRAP, SOCI and ST4S each map to a required test, with cadence guidance. - [ST4S Assessments for EdTech](https://www.coresentinel.com/st4s-assessments-penetration-testing-requirements-cadence-compliance-for-australian-edtech-providers/): Safer Technologies 4 Schools testing requirements and cadence. - [Penetration Testing for PCI Compliance](https://www.coresentinel.com/pci-penetration-testing/): What PCI DSS requires and how to satisfy it. ## Guides and explainers - [The Definitive Guide to Penetration Testing](https://www.coresentinel.com/definitive-guide-penetration-testing/): What penetration testing is, how it works, types of tests, certifications to look for, and current 2026 practice including AI-assisted testing. - [Penetration Testing Cost in Australia](https://www.coresentinel.com/penetration-testing-cost-australia/): What drives the price of a penetration test in Australia - scope factors, engagement model and how fixed-price quotes work (no published rate card). - [Why Penetration Testing?](https://www.coresentinel.com/why-penetration-testing/): The business scenarios that drive testing - compliance mandates, client requirements, incidents and risk management. - [Web Application Penetration Testing Guide](https://www.coresentinel.com/web-application-penetration-testing/): A practical 7-step guide to how web application testing works. ## Phishing takedown - [Phishing Takedown Service](https://www.coresentinel.com/phishing-takedown/): Flat USD $500 single-site takedown with a 72-business-hour money-back SLA; USD $900 with 30 days of monitoring. - [Phishing Takedown Australia](https://www.coresentinel.com/phishing-takedown-australia/): Australian-operated takedown, including .au domains, auDA, Scamwatch and ACSC reporting guidance. - [How to Take Down a Phishing Site](https://www.coresentinel.com/how-to-take-down-a-phishing-site/): Free step-by-step DIY guide. - [Report a Phishing Website](https://www.coresentinel.com/report-phishing-website/): Where and how to report phishing, in Australia and internationally. - [Check a Suspicious Link (urlscan.io)](https://www.coresentinel.com/report-phishing/urlscan-io/): Free tool page for previewing suspicious URLs safely. ## Service comparisons - [PhishFort Alternative](https://www.coresentinel.com/phishfort-alternative/): How Core Sentinel's flat-fee takedown compares. - [Netcraft Alternative](https://www.coresentinel.com/netcraft-alternative/): Comparison for single-site takedowns without an enterprise contract. - [Bolster Alternative](https://www.coresentinel.com/bolster-alternative/): Comparison focused on pay-per-takedown pricing. - [BrandShield Alternative](https://www.coresentinel.com/brandshield-alternative/): Comparison for SMB brand-protection needs. ## Company - [About Us](https://www.coresentinel.com/about-us/): Company background and the senior-only testing model. - [Contact](https://www.coresentinel.com/contact-us/): Scoping quotes and enquiries - a senior tester replies personally. - [Blog](https://www.coresentinel.com/blog/): Guides on penetration testing, compliance and offensive security.