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Good Security

Founder & Principal Consultant

Darren Castelyn

Security leadership experience built across regulated SaaS, enterprise assurance, higher education, and central government. Good Security exists to give growing NZ businesses the structure that buyers, insurers, and boards now expect.

Professional background

Security leadership grounded in delivery, not theory.

Most security consultants arrive with frameworks and leave with a report. Darren's background is different — it is built on years of operating inside organisations where security, privacy, and risk had to work in practice, not just on paper.

From leading security, compliance, resilience, and AI governance in regulated SaaS to building the response library, audit evidence, and operating controls used to answer scrutiny from financial services, aerospace, industrial enterprise, and pharmaceutical customers, from managing security across three university campuses to shaping policy and infrastructure discipline in central government — the thread is the same: make the work usable, keep it visible, and build it to survive real scrutiny.

Good Security brings that operating discipline to NZ businesses that are being asked harder questions than they can currently answer — by customers, insurers, boards, and regulators.

Career timeline

Built across environments where security had to work in practice.

Private sector, higher education, and central government — each shaped the operating discipline behind Good Security.

Aug 2025 — Present

Global Head of Cybersecurity Operations and AI Enablement

Docuvera

Leads global security, compliance, operational resilience, and enterprise AI governance for a regulated SaaS platform, including ISMS operation, audit readiness, incident response, and the AI risk programme.

Mar 2022 — Aug 2025

Global Head of Cybersecurity and Operations

ASC / Author-it Software Co.

Led company-wide cybersecurity and operational transformation, built the master security response library, and established the audit and governance rhythm needed to answer regulated enterprise scrutiny.

Jul 2018 — Mar 2022

Solutions Architect → Information Security Manager → Associate Director

Massey University

Progressed into the associate director remit for security, information, records, and risk, taking accountability for cybersecurity oversight, major incident handling, and governance across three campuses.

Jun 2012 — Jul 2018

Lead Systems Engineer → Infrastructure Architect → Enterprise Information Security Assurance Manager

Ministry of Social Development

Progressed from core infrastructure leadership into enterprise information security assurance, building the policy discipline, service resilience, and cyber-risk rigour that shaped later security leadership work.

May 2008 — Jun 2012

Mobile Communications Advisor → Infrastructure Specialist

New Zealand Transport Agency

Built early public-sector operating discipline through national mobility and infrastructure roles, including large-scale endpoint, connectivity, and service continuity responsibilities.

Why this work matters

Growing businesses deserve security leadership that fits how they actually operate.

Most NZ businesses do not need a full-time CISO. But they do need someone who can build credible reporting, map obligations to owners, produce evidence that answers real questions, and keep the work running after the first burst of urgency passes.

That is what Good Security does. Not theatre. Not a framework left on a shelf. Practical security leadership that makes the business easier to trust from the outside and easier to run from the inside.

Ready to talk?

Book a free consultation and find out what the right starting point looks like for your business.