Australia Cybersecurity in Critical Infrastructure Market Size, Share, Growth and Forecast, 2025-2035

SOCI duties turn protection into a board-level budget line

The Australia cybersecurity in critical infrastructure market was valued at USD 3.44 billion in 2025 and is projected to increase from USD 3.91 billion in 2026 to USD 11.75 billion by 2035, registering a CAGR of 13.02% during 2026–2035. Demand comes from owners of power networks, gas pipelines, ports, water utilities, telecom carriers, banks, hospitals and defense suppliers, who must now run board-approved risk management programs under the Security of Critical Infrastructure Act. New South Wales and Australian Capital Territory held the largest regional share, 33.7% in 2025, because Sydney hosts most bank and carrier headquarters while Canberra hosts federal agencies and the Australian Signals Directorate. Western Australia and South Australia is the fastest-growing region at 13.28% a year, as resources, energy and defense sites widen their operational technology defenses. At the same time, ransomware payment reporting became mandatory from May 30, 2025, for businesses with annual turnover of A$3 million or more.

Which security products and services does the estimate count?

The estimate counts spending in Australia on network and infrastructure security, cloud and endpoint protection, managed security and monitoring services, and security advisory work bought by owners and operators of critical infrastructure assets. Buyers include electricity, gas, water and fuel operators, telecom carriers, banks and market operators, hospitals, freight and food supply businesses, universities and defense suppliers, who buy through subscriptions, managed service retainers and project fees.

The estimate excludes physical guarding, general IT spending that is not security related, consumer security software and spending by businesses outside the critical infrastructure sectors. The value chain links global security platform vendors, local integrators and managed service providers, security operations centers, advisory and testing firms, and the federal agencies that set reporting and risk management duties.

Infrastructure tools lead as managed services grow fastest

Why does infrastructure security hold the largest share?

Based on solution type, the market is categorized into infrastructure security, cloud and endpoint security, managed security services and security advisory. Infrastructure Security led with a 34.0% share of 2025 value, because operators protect networks, gateways and control systems before other layers. Managed Security Services grow fastest at 13.72% a year, as asset owners without large internal teams buy round-the-clock monitoring and response.

Which critical sectors spend the most on security?

Based on end-use industry, the market is categorized into Energy and Utilities, Communications and Finance, Health and Essential Supply Chains, and Defence and Knowledge Infrastructure. Communications and Finance led with a 34.0% share of 2025 value, because banks and carriers face the most incidents and the oldest regulatory duties. Health and Essential Supply Chains grows fastest at 13.54% a year, as hospitals, freight and food operators move from basic controls to formal risk programs.

How quickly are operators moving security to the cloud?

Based on deployment model, the market is categorized into on-premises, cloud-delivered and hybrid deployments. On-Premises led with a 41.0% share of 2025 value, because control rooms, substations and classified networks keep security appliances on site. Cloud-Delivered grows fastest at 14.00% a year, as vendors host detection, logging and access tools in Australian data centers that meet government assessment rules.

Where does detection and response sit against prevention?

Based on application, the market is categorized into threat prevention, detection and response, risk assurance and recovery readiness. Threat Prevention led with a 38.0% share of 2025 value, because firewalls, access controls and patching still take the first share of each budget. Detection and Response grows fastest at 13.66% a year, as incident reporting rules push operators toward continuous monitoring and faster containment.

Risk programs, attacks and resilience rules lift spending

How do SOCI risk programs create recurring security spend?

The Security of Critical Infrastructure Act now requires owners of covered assets to run a written risk management program, which turns security from an occasional project into an annual budget line. The rules were registered on Feb. 17, 2023, and cover electricity, gas, water, liquid fuel, freight, food and grocery, data storage, financial market and designated hospital assets, according to Industrial Cyber. Operators had until Aug. 17, 2024, to comply with a recognized cyber and information security framework, and each program needs an annual report approved by the board. Telecommunications risk management rules followed from April 4, 2025, according to King & Wood Mallesons. As a result, operators buy recurring managed IT services, assessments and audits each year.

Why does rising attack volume widen continuous monitoring?

Attack volumes against essential services keep rising, which pushes operators from periodic checks toward monitoring that runs every hour of the day. The Australian Signals Directorate responded to more than 1,200 incidents in 2024-25, and critical infrastructure accounted for 13% of them, according to its critical infrastructure factsheet. The same factsheet says denial-of-service incidents rose more than 280% and made up 31% of incidents against critical infrastructure. Financial and insurance services drew 32% of those incidents, transport, postal and warehousing 26%, and telecommunications 16%. In turn, detection and response grows at 13.66% a year, faster than any other application.

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How does operational resilience broaden security buying?

Regulators now judge operators on how well they keep essential services running, which widens buying from perimeter tools to recovery, testing and third-party risk work. APRA's CPS 230 standard applied to banks, insurers and superannuation funds from July 1, 2025, requiring them to identify critical operations, test continuity plans and manage material service providers, according to Bright Law. Mandatory ransomware payment reporting within 72 hours started on May 30, 2025, according to the Australian Computer Society. IBM put the average Australian breach cost at A$4.22 million in its 2026 study, according to IT Brief. As a result, recovery readiness and risk assurance draw larger budgets across every sector.

How does federal cyber funding pull private operators along?

Federal funding programs set expectations that private operators must match, which raises spending across utilities, carriers and defense suppliers. The 2023-2030 Australian Cyber Security Strategy, released on Nov. 22, 2023, commits A$586.9 million to 2030, including A$143.6 million for critical infrastructure protection and government security, according to the Minister for Home Affairs. The 2022-23 budget also allocated A$9.9 billion over 10 years to the REDSPICE program, which aims to double the size of the Australian Signals Directorate, according to the Parliamentary Library. Australia had about 44,299 secure internet servers per million people in 2024, according to the World Bank, a large exposed footprint that operators and agencies must defend. In turn, Defence and Knowledge Infrastructure grows faster than Communications and Finance, the largest end-use group in 2025.

Shared threat data, sovereign cloud and OT isolation advance

How is the rise of shared threat intelligence changing defense?

Operators increasingly feed government threat data straight into their own security tools, which shifts buying toward platforms that can share and act on alerts automatically. Cisco said on Sept. 25, 2025, that Splunk had built a plug-in linking its security software to the Australian Signals Directorate's threat sharing platform, open to critical infrastructure operators, according to Cisco. Microsoft announced the Microsoft-Australian Signals Directorate Cyber Shield on Oct. 24, 2023, focused on nation-state threats, according to W.Media. The Australian Signals Directorate also answered more than 42,500 hotline calls in 2024-25, according to the defense minister. As a result, detection and response becomes the fastest-growing application through 2035.

Why is the shift to sovereign cloud security accelerating?

Operators want security tools hosted in Australia and assessed for government use, which shifts spending from on-site appliances to locally hosted cloud services. Microsoft committed A$5 billion over two years in October 2023 to lift its local computing capacity about 250% and grow from 20 to 29 data center sites in Canberra, Melbourne and Sydney, according to W.Media. CrowdStrike said on Jan. 17, 2024, that its Falcon platform had completed an Information Security Registered Assessors Program assessment for government buyers. Splunk Observability Cloud also earned a PROTECTED level assessment in September 2025, its 20th assessed offering, according to Cisco. In turn, cloud-delivered deployment grows at 14.00% a year, the fastest deployment model.

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Can operational technology isolation open new projects?

Federal guidance now asks operators to keep vital control systems running even when they are cut off from outside networks, which opens new segmentation and recovery projects. The Australian Signals Directorate's CI Fortify guidance asks operators to prepare to isolate vital operational technology for up to three months in a crisis, according to its 2024-25 factsheet. Fortinet named Australia in April 2024 as one of four Asia Pacific markets with rising demand for operational technology security, according to SecurityBrief Australia. The Australian Energy Market Operator also runs an annual energy sector framework assessment, with its 2026 portal open from March 16 to May 1. As a result, demand for energy OT protection rises across power and gas networks.

Is there an opening in health and supply chain security?

Hospitals, prescription networks, freight operators and food suppliers have newer duties and thinner security teams, which opens room for managed services sized for them. MediSecure confirmed in July 2024 that data on about 12.9 million Australians had been taken in a ransomware attack on its prescription systems, according to the Australian Computer Society. The 2023 strategy also set aside A$9.4 million for a health sector threat sharing platform, which adds demand for monitoring in hospitals, according to Home Affairs. Designated hospitals, freight and food assets are also named in the risk management rules. In turn, Health and Essential Supply Chains grows at 13.54% a year, and spending on hospital data protection rises with it.

Skills gaps, legacy OT and supply chains slow upgrades

How do security skills gaps slow critical asset programs?

Critical infrastructure operators compete with banks, consultancies and government agencies for a small pool of security engineers, especially people who understand control systems. Australia had 11,387 people in specialist cybersecurity roles, about one for every 240 businesses, according to a StickmanCyber analysis of Australian Bureau of Statistics data reported by the Canberra Times in August 2024. As a result, regional utilities and smaller hospitals struggle to staff security teams around the clock. Operators respond with managed services, graduate programs and automation that stretch small internal teams.

Why does legacy operational technology resist upgrades?

Many substations, pumping stations and rail control systems run older equipment that cannot be patched or taken offline easily. Scanning and reconnaissance made up 41% of incidents against critical infrastructure in 2024-25, according to the Australian Signals Directorate, which shows attackers probing exposed systems. The agency published its principles of operational technology cyber security on Oct. 2, 2024, to help operators secure these systems. As a result, operators add segmentation and monitoring, which raises design and testing costs on every project.

How do supply chain risks complicate assurance work?

Operators depend on software, cloud and maintenance providers whose own weaknesses can expose critical assets, and new rules make operators answer for these providers. APRA's CPS 230 standard requires banks, insurers and superannuation funds to manage risks from material service providers from July 1, 2025, according to Bright Law. The MediSecure attack disclosed in 2024 showed how one prescription provider could expose data on 12.9 million people. In turn, assurance teams must review many contracts, audit reports and remote access paths each year.

Why do overlapping rules raise compliance costs?

A single operator can face duties under the critical infrastructure act, prudential standards, privacy law and state rules at once, each with different reporting forms and timelines. Telecommunications risk rules began on April 4, 2025, ransomware payment reporting on May 30, 2025, and smart device security standards on March 4, 2026, according to King & Wood Mallesons. As a result, compliance teams spend time mapping controls instead of improving them. Advisory firms respond by mapping one control set to several frameworks at once.

Sydney and Canberra lead as western states grow fastest

Sydney banks and Canberra agencies anchor the lead

New South Wales and Australian Capital Territory held 33.7% of 2025 value and grows at 12.78% a year, because Sydney hosts most bank, insurer and carrier headquarters. Canberra hosts federal agencies and the Australian Signals Directorate, which shapes demand for assessed security services. The two had about 9.16 million residents in March 2026, according to the Australian Bureau of Statistics. Microsoft also runs data centers in Sydney and Canberra, and these hyperscale facilities let operators keep security logs inside Australia.

How do Melbourne service firms support Victoria and Tasmania?

Victoria and Tasmania held 24.6% of 2025 value and grows at 12.98% a year, because Melbourne combines large utility, port and hospital networks with major security service firms. CyberCX is headquartered in Melbourne and runs security operations centers across Australia and New Zealand, according to Accenture. Microsoft also runs data centers in Melbourne, which supports locally hosted security services. Victoria's population grew 1.6% in the year to March 2026, which keeps network and service loads rising.

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Why does Queensland and Northern Territory add strong demand?

Queensland and Northern Territory held 20.2% of 2025 value and grows at 13.18% a year, because long power, rail and port networks need protection across vast distances. The Queensland budget gave the state Cyber Security Unit about A$59.4 million over four years from 2023-24, according to InnovationAus. Queensland's population rose 1.6% and the Northern Territory's 1.5% in the year to March 2026, which adds demand for protecting new connections and services.

How do western energy and defense sites lift growth?

Western Australia and South Australia held 21.5% of 2025 value and grows fastest at 13.28% a year, because mining, energy and defense sites widen their control system defenses. Western Australia's population rose 2.1% in the year to March 2026, the fastest of any state, which lifts demand for new network defenses. In Adelaide, Cisco agreed in April 2022 to help build a Critical Infrastructure Lab at the Australian Cyber Collaboration Centre at Lot Fourteen. As a result, operational technology and testing work grows across both states.

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Rules, acquisitions and threat sharing mark 2023 to 2026

Detection, segmentation and threat sharing shape defense

• Extended detection and response platforms collect alerts from endpoints, networks and cloud services, which lets analysts find and contain attacks in one console.
• Network segmentation for control systems separates operational technology from office networks, which lets operators isolate plants and substations during an attack.
• Automated threat sharing feeds push government and industry indicators straight into security tools, which lets operators block known threats within minutes.
• Locally hosted cloud security services keep logs and analysis inside Australian data centers, which lets agencies and operators meet government assessment rules.

Local service firms and global platforms compete on trust

Competition combines global security platform vendors with local service firms that hold security clearances and run operations centers inside Australia. Accenture completed its purchase of CyberCX in February 2026, adding about 1,400 professionals who serve government and critical infrastructure clients. Thales Cyber Services ANZ grew from the Tesserent purchase in October 2023, bringing about 500 staff across nine offices. Telstra sells operational technology security, denial-of-service protection and detection and response services, and Victoria University named Telstra Purple as the enablement partner on its network project. Palo Alto Networks opened an Australian cloud location in January 2021 that keeps Cortex XDR logs within Australia. Microsoft, CrowdStrike, Palo Alto Networks and Cisco compete on locally hosted and government-assessed platforms, while Fortinet targets control system security. Rivals compete on clearances, local hosting, response speed and sector knowledge.

Which providers shape Australian critical asset security?

Credence Research view on Australian infrastructure defense

Credence Research's view is that spending on security for Australian critical infrastructure will keep rising because risk management programs, incident reporting and resilience standards now apply every year rather than once. Infrastructure security remains the largest pool, yet growth increasingly comes from managed services, detection and response, and cloud-delivered tools hosted in Australia. Providers that combine local operations centers, security clearances and control system expertise should gain share as operators consolidate suppliers. Managed security services, growing at 13.72% a year, are likely to become the second-largest solution type before 2035.

How the critical asset security estimate was built

The report uses 2025 as the base year on a calendar basis, and market values come from the Credence Research model. That model combines regulatory obligations, incident statistics, government funding programs, population data and company releases. Region growth rates and segment splits are Credence Research estimates built from state population growth, the incident mix by sector and the location of security operations centers, while regional shares follow the source sheet. Sources used are government, statistical agency, international organization, trade press and company publications, and no interviews or surveys were used.

Mandatory programs keep security budgets rising to 2035

The Australia cybersecurity in critical infrastructure market is expected to reach USD 11.75 billion by 2035, a 13.02% CAGR during 2026–2035, as mandatory risk programs, incident reporting and resilience rules keep security budgets growing. Growth should be strongest in managed security services, cloud-delivered deployment, detection and response, and Western Australia and South Australia. Demand for industrial control system defenses will also rise as operators prepare plants and networks to run in isolation during a crisis.

Note: The depth of individual sections depends on data availability for this market. Volume, capacity, trade and other unit-based metrics are included where applicable.