Critical Minerals, Critical Infrastructure: The Growing Security Case for WA Miners

Critical minerals have become the centre of gravity in WA's resources sector — and not only for commercial reasons. Rare earths, lithium, and battery metals now sit at the intersection of investment, government policy, and national security, drawing a level of attention that the sector hasn't had to deal with before.

That shift is visible in how the market itself is organising. Legal advisers moving into Perth are building capability specifically around critical minerals expertise, and government figures — from the WA Minister for Mines and Petroleum to the Department of Energy and Economic Diversification — are actively engaged with the sector's growth and its strategic significance. Critical minerals aren't being treated as just another mining sub-sector. They're being treated as strategic infrastructure.

That reframing has a direct, practical consequence for the companies producing and processing these minerals: expectations around security, data governance, and operational resilience are rising, whether or not a company has explicitly planned for it.

Why do mining companies carry unusual security exposure?

Resources companies sit in a harder position than most sectors when it comes to security. Critical minerals producers in WA face a combination of structural risks that most industries never encounter together: decades-old operational technology that was never designed to be connected, rapid digitisation pushing IT and OT systems into the same environment, and reserve and processing data that now carries geopolitical as well as commercial value. The Australian Cyber Security Centre has repeatedly flagged the resources sector as a priority target, and the Australian Signals Directorate's annual cyber threat report shows critical infrastructure incidents rising year on year. For a mid-sized WA miner, the practical consequence is a threat profile closer to a defence contractor than a comparably sized business in another sector — without, in most cases, a comparably sized security function to match.

A few structural drivers sit behind this:

• Legacy operational technology. Site-level control systems were often built for reliability and longevity, not for a connected, monitored environment — and retrofitting security onto them is materially harder than building it in from the start.
• Growing IT/OT convergence. As companies digitise operations — remote monitoring, automation, data-driven exploration — the boundary between corporate IT and operational technology blurs, and so does the attack surface.
• Strategic asset value. Critical minerals data — reserve estimates, processing methods, supply agreements — has commercial and, increasingly, geopolitical value, making these companies more attractive targets than their size alone would suggest.
• Capital events amplify scrutiny. A raise, listing, or M&A process invites investor and regulator attention to a company's security posture in a way ordinary operations don't — a gap that goes unnoticed day-to-day can become a serious issue during due diligence.

What does good security practice look like for WA critical minerals companies?

Companies managing this environment well tend to converge on a small number of consistent practices, regardless of size. They map every point where operational technology meets corporate IT, rather than assuming the two are separate. They apply access controls and monitoring in proportion to the sensitivity of the underlying asset — treating reserve estimates, exploration data, and processing IP with at least the same rigour as financial systems. They document their security posture in a way that can be presented credibly to an investor, acquirer, or regulator on short notice, rather than reconstructed under pressure. And they plan for resilience, not just prevention: assuming incidents will happen, and rehearsing the response. The ACSC Essential Eight remains the baseline most Australian boards now expect, but for critical minerals producers it is a floor, not a ceiling.

In practice, the recurring themes are:

• A clear-eyed map of OT/IT convergence points — knowing exactly where operational and corporate systems intersect.
• Access control and monitoring proportional to asset sensitivity — reserve and exploration data treated with the same rigour as financial systems.
• Security postures that are documented and demonstrable — ready for investors, acquirers, or regulators without a scramble.
• A resilience plan, not just a prevention plan — with a tested incident response process behind it.

How does security posture affect capital raises and M&A in the resources sector?

Security and governance work in this sector is increasingly not just a defensive necessity — it is part of the investment case. Institutional investors, particularly those with ESG or critical-infrastructure mandates, now routinely include cyber and data governance questions in diligence. Acquirers in the critical minerals space are doing the same, often bringing in specialist advisers to review OT security, IP protection, and incident history before signing. A company that can present a mature, documented posture in that setting moves faster, negotiates from a stronger position, and avoids the price adjustments and warranty carve-outs that come with unresolved security findings. A company that cannot tends to discover the gap at the worst possible moment.

The practical upside is straightforward: companies that treat security as core infrastructure — rather than a compliance afterthought — have an easier story to tell investors who are themselves under growing pressure to consider these risks, and an easier path through the diligence, partnership, and acquisition conversations that define the next phase of WA's critical minerals sector.

Where should a WA critical minerals company start?

For most mid-sized producers, the right starting point is not a large security programme — it is a clear, honest baseline. That usually means a short assessment of where OT and IT systems intersect, how sensitive data is currently protected, and how the organisation would respond to a serious incident today. From there, a prioritised roadmap can address the highest-impact gaps first, aligned to the Essential Eight and to the specific expectations of investors and acquirers active in the critical minerals space. This is the kind of work that, done early, quietly removes a category of risk that would otherwise surface at the worst possible moment.

As WA's critical minerals sector continues to draw capital and policy attention, the companies that treat security as core infrastructure will be the ones best positioned to move quickly when the next opportunity — a raise, a partnership, or an acquisition — arrives.

Mycelium 365 works with WA mining and critical minerals companies to build security and data governance practices that hold up under investor, regulator, and acquirer scrutiny. If you're not sure where your organisation stands, it's worth finding out before someone else asks.