IBM recently unveiled its latest quantum computing milestones, demonstrating that we are moving from the era of quantum experimentation into something approaching practical utility. For those of us working in public sector technology, this is not a distant academic curiosity anymore. It is something we need to start thinking about seriously.

I have spent my career delivering technology transformation in government. Quantum computing represents both one of the most significant opportunities and one of the most pressing challenges that public sector technology leaders will face in the coming decade.

What’s actually happening

Quantum computers exploit the principles of quantum mechanics, specifically superposition and entanglement, to process information in fundamentally different ways to classical computers. They are not faster versions of what we already have. They are a different paradigm entirely.

IBM’s roadmap has been remarkably consistent. They have moved from proof-of-concept systems to processors with over a thousand qubits, and they are now focused on error correction and practical application. The recent demonstrations show quantum systems solving problems that would take classical supercomputers impractical amounts of time.

This is not hype. It is engineering progress on a published timeline.

Why government should care

Three areas stand out for the public sector:

Cryptography and national security. Most of the encryption that protects government data, citizen records, and critical national infrastructure relies on mathematical problems that quantum computers will eventually be able to solve. The transition to post-quantum cryptography is not optional. It is a matter of when, not if. Organisations that start late will find themselves exposed.

Complex optimisation problems. Government deals in complexity at scale. Logistics networks, resource allocation, infrastructure planning, and emergency response coordination are exactly the kinds of problems where quantum computing could deliver step-change improvements over classical approaches.

Scientific research and public health. Drug discovery, climate modelling, and materials science are all areas where government funds significant research. These are domains where quantum advantage could accelerate progress dramatically.

The challenges for government

Let’s be honest about what makes this hard for the public sector specifically:

The skills gap is real. Quantum computing requires expertise that barely exists in the private sector, let alone in government. Building internal capability, even at the level of informed commissioning, will take deliberate investment.

Legacy infrastructure. Government runs on systems that were built decades ago. The cryptographic transition alone will require touching systems across every department, many of which are poorly documented and deeply interconnected.

Procurement and pace. Government procurement cycles are measured in years. Quantum computing is advancing in months. The mismatch between how government buys technology and how quickly this field is moving creates a real risk of being left behind.

The “harvest now, decrypt later” threat. Adversaries may already be collecting encrypted government data with the intention of decrypting it once quantum computers are capable. This means the security challenge is not something for the future. It is a present concern.

What public sector leaders should do now

You do not need to become a quantum physicist. But you do need to be quantum-aware. Here is what I would recommend:

Start the cryptographic audit. Understand where your organisation uses encryption, what algorithms are in play, and which systems would be vulnerable. NCSC guidance on post-quantum cryptography is a good starting point.

Build awareness at board level. Quantum computing should feature in your technology strategy and risk register. It is not a five-year problem anymore. It is a two-to-three-year preparation window for the cryptographic transition.

Identify use cases. Work with your data and analytics teams to identify problems that are currently intractable with classical computing. These are your candidates for early quantum advantage.

Engage with the ecosystem. IBM, and others, offer quantum computing access through cloud platforms today. You do not need to buy a quantum computer. You need to start experimenting with quantum algorithms on real problems.

Invest in people. Even a small number of people with quantum literacy can transform an organisation’s readiness. Consider secondments, partnerships with universities, or dedicated learning programmes.

The opportunity is real

I am optimistic about what quantum computing could mean for public services. The ability to model complex systems, optimise resource allocation, and accelerate scientific discovery could genuinely improve outcomes for citizens.

But only if we start preparing now. The organisations that will benefit most from quantum computing are those that have done the groundwork: understood their data, modernised their infrastructure, and built the skills to exploit new capabilities when they arrive.

For those of us in public sector technology leadership, that preparation should start today.