Trusted Engineering for Resilience & Enterprise Security

Cyber Security Consulting for Small and Medium Business

TERESEC is an Australian cyber security consultancy. We check how well your business is protected, explain what we find in plain English, and help you fix what matters most - built for small and medium businesses, with the same standards we bring to enterprise and government.

Who We Are

TERESEC delivers pragmatic, plain-English security consulting built on deep technical expertise and operational experience. Most of our work is with small and medium businesses - organisations that face the same threats as the big end of town, without the same resources. Our background is at the deep end: energy, utilities, government and financial services. We bring that standard of engineering to businesses of every size. Through our technology partnerships we also source and deliver the hardware and software behind our recommendations - so the control we specify is the control that gets deployed, without a handover to a third party.

Our Mission

To make honest, practical cyber security available to businesses of every size - through clear assessments, actionable recommendations, and long-term partnerships built on trust.

Who you'll work with

Greg Tereszczyn

Greg Tereszczyn is the founder and principal consultant of TERESEC, an Australian cyber security consultancy for small and medium business. He turns the Essential Eight, the ISM, ISO/IEC 27001, NIST CSF and IEC 62443 into plain-English advice a business can act on.

Greg Tereszczyn on LinkedIn

Partnerships & Accreditations

  • Rapid7 PACT

    Registered Partner - Vulnerability management, detection & response, and application security.

  • NinjaOne

    Partner - Endpoint management and automated patching - remediation alongside Rapid7.

  • Ingram Micro

    Partner - Hardware and software delivery - security solutions from Fortinet, Palo Alto Networks, AlgoSec, Veeam and more.

  • QAssure

    Business Ready · #25069 - Pre-qualified on the Queensland Government ICT services register.

Standards & Frameworks

  • NIST CSF

    Risk-based security framework covering Identify, Protect, Detect, Respond, and Recover functions.

  • IEC 62443

    International standard for industrial automation and control system (IACS) cybersecurity.

  • ISO/IEC 27001

    Information security management systems standard for governance and risk-based control selection.

  • Essential Eight

    ACSC mitigation strategies prioritised for Australian organisations to protect against cyber threats.

  • PSPF / ISM

    Australian government security frameworks for protecting official information and systems.

  • MITRE ATT&CK

    Adversary tactics and techniques knowledge base used for threat modelling and detection engineering.

What TERESEC stands for: Trusted Engineering for Resilience & Enterprise Security