ABOUT

Helping Australia become quantum safe.

Southern Quantum helps Australian organisations manage the risks that quantum computing brings. Today that means the move to post-quantum cryptography, and the agility to keep changing cryptography as standards and threats evolve. We deliver it through advice, implementation with technology partners, and managed services. As quantum sensing and networking mature, we’ll help clients assess what they mean too.

FOUR COMMITMENTS

  1. 01

    We work to official guidance, not around it.

    Every engagement maps to the LATICE phases and the Information Security Manual (ISM) from the Australian Signals Directorate (ASD), so the work will satisfy your auditors.

  2. 02

    Every finding is backed by evidence.

    Where a claim cannot be verified, we record it as a risk with an owner, not as a completed item.

  3. 03

    You keep everything we find.

    Inventories, plans and evidence are yours, in formats your teams can maintain.

  4. 04

    Australian-owned and independent.

    Our advice is driven by what you need, not by which vendor’s technology you use or who controls it.

FOUNDERS

Experience in cryptography and in leading change.

We have briefed Australian Government agencies and critical infrastructure operators on the quantum threat since 2023. The same gap kept appearing: organisations understood the risk but had no vendor-neutral path to act on it. And few advisers combined deep cryptographic engineering with experience running change inside regulated organisations. In 2025 that work became a dedicated quantum practice. Southern Quantum is that practice, set up as its own company so it can grow.

Stephen Chey

CO-FOUNDER

Stephen leads Southern Quantum’s client engagements. He has more than 30 years’ experience in technology across Asia Pacific, the Middle East and Africa, including senior roles at IBM and PwC. Since 2023 he has worked with leaders in government, financial services, telecommunications and critical infrastructure on Australia’s response to quantum security threats.

  • CISSP · MBA · MACS CP
  • Visiting Fellow, Cyber & Digital Centre, UTS
  • NSW Cyber Security Ambassador
  • Member, PKI Consortium PQC Working Group
Read Stephen’s writing →

Narayana Madineni

CO-FOUNDER

Narayana Madineni helps Australian organisations prepare for the post-quantum era. Honored as IBM Master Inventor with patents in quantum-safe cryptography, he has run PQC awareness programs for Australian businesses for several years and spoken at the Quantum Safe Panel at Quantum Australia 2025, the 2026 Quantum Safe Executive Roundtable in Adelaide (Quantum Australia and IBM), the IBM Data Security Conference's PQC panel, and a roundtable on machine identity, PKI, and PQC. He now runs hands-on Post-Quantum Cryptographic Planning Workshops for CISOs and Chief Risk Officers, helping organisations including APRA-regulated institutions build the cryptographic transition plans.

  • Member, PKI Consortium PQC Working Group
Read Narayana’s writing →

Talk to the people who will do the work.

Contact us