What Is Cyber Security? A Plain Guide for Irish Businesses

What Is Cyber Security?

Cyber security is the combination of technologies, processes and everyday practices used to protect an organisation’s computers, networks, applications, accounts and data from unauthorised access, disruption, theft and cyber attack.

For modern organisations, cyber security extends far beyond antivirus software and firewalls. Businesses now depend on cloud services, Microsoft 365, remote access, mobile devices and interconnected systems. Each of these creates potential points of attack that need to be properly secured and monitored.

Effective cyber security therefore means protecting the organisation as a whole — its people, identities, devices, systems, applications and information.

Cyber security is about managing risk

No organisation can eliminate every cyber threat. The objective is to reduce risk, prevent avoidable attacks, identify suspicious activity quickly and respond effectively when an incident occurs.

Why Does Your Business Need Cyber Security?

Cyber attacks are not limited to large corporations. SMEs, professional organisations and public sector bodies can all be targeted through phishing, stolen credentials, ransomware, compromised email accounts and vulnerabilities in systems or software.

A successful cyber attack can result in lost or stolen data, interrupted operations, financial loss and reputational damage. Organisations may also have responsibilities under regulations and standards such as GDPR, NIS2 and ISO 27001.

Cyber security is therefore not simply about preventing an attack. It is about reducing risk, detecting suspicious activity quickly, responding effectively when something happens and ensuring the organisation can recover.

What Does Effective Cyber Security Involve?

A strong cyber security strategy uses several layers of protection rather than relying on one product or technology. Depending on the organisation, these can include:

Identity and access security
Microsoft 365 and cloud security
Endpoint and device protection
Managed detection and response (MDR)
Vulnerability assessment and remediation
Security awareness and phishing training
Backup and disaster recovery
Dark web and compromised credential monitoring
Security policies, governance and compliance

These protections work together to reduce the opportunities available to attackers while helping organisations identify and respond to threats when they occur.

How ERS IT Solutions Helps

ERS IT Solutions works with organisations across Ireland to assess their cyber security requirements and put appropriate protections in place.

Rather than treating cyber security as a collection of isolated products, ERS helps organisations build a coordinated approach covering users, devices, cloud services, networks, data, monitoring, recovery and compliance.

For organisations requiring ongoing protection and monitoring, our Managed Cyber Security Services bring these capabilities together as a managed service.

Certified and Connected

Our own standards reflect the same rigour we help our clients achieve.

Cyber Essentials Certified

ERS IT Solutions holds Cyber Essentials Certification, the UK and Ireland government-backed standard that verifies an organisation has essential technical controls in place to defend against the most common cyber attacks.

Achieving Cyber Essentials demonstrates that ERS has independently verified:

Secure configuration of all systems and devices
Boundary firewalls and internet gateways
Access control and user privilege management
Malware protection across our IT estate
Timely security patch and update management

This certification isn’t just a badge — it reflects the same rigorous standards we help our clients achieve. Many of our SME and public sector clients look to ERS to guide them through their own Cyber Essentials certification journey, drawing on our first-hand experience of the assessment process.

Learn more about Cyber Essentials Learn more about Cyber Essentials

Proud Members of Cyber Ireland

ERS IT Solutions is a proud member of Cyber Ireland, the national cybersecurity cluster bringing together industry, academia, and government to strengthen Ireland’s cybersecurity ecosystem.

Membership connects ERS to:

A national network of cybersecurity practitioners, researchers, and policymakers
The latest thinking on threat intelligence, regulation (NIS2, GDPR), and best practice
Collaborative initiatives that raise the security bar for Irish organisations of all sizes

Being part of Cyber Ireland reinforces our commitment to staying at the forefront of the industry — so our clients benefit from advice that’s current, informed, and grounded in Ireland’s specific regulatory and threat environment.

Visit Cyber Ireland

Why Choose ERS IT Solutions

✓Cyber Essentials Certified

✓Member of Cyber Ireland

✓Microsoft Cloud Solution Provider

✓Dublin-based, Ireland-focused expertise

✓Trusted by schools, healthcare and public sector bodies across Ireland

Want to understand where your organisation may be exposed?

Talk to ERS IT Solutions about your cyber security requirements and the practical steps you can take to reduce risk.

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Common questions

What cyber security does a small business in Ireland need?

Start with the basics that stop most attacks: MFA on every account, automatic updates, no unsupported software, email filtering, offline backups you have tested, and short regular staff training. That is a workable cyber security checklist for a small business. Then add 24/7 monitoring so someone sees an intruder out of hours. The NCSC's free guidance for small business sets out the same steps.

What is the best cyber security for a small business?

There is no single best product. The best cyber security for a small business is a set of controls that fit your size: Microsoft 365 configured properly with MFA and Conditional Access, managed endpoint protection that someone monitors, tested backups and trained staff. Cyber Essentials is a sensible target because it defines the basics clearly. ERS IT Solutions provides cyber security services for small business across Ireland from Dublin 15.

Who is responsible for cyber security in a company?

The directors are, even if the work is outsourced. GDPR places responsibility for security on the organisation as data controller, and under NIS2 management bodies must approve security measures and can be held liable. In practice, name one director as the owner of cyber risk, give your IT provider clear responsibilities in writing, and make every employee responsible for reporting anything suspicious.

What should a cyber security policy for a small business include?

A company cyber security policy should cover: who owns security, acceptable use of devices and email, passwords and MFA, software updates, backups, remote working and lost devices, handling personal data, reporting incidents and staff training. Keep it to a few pages so people read it. ERS helps clients write a sample policy that matches what their systems actually do, rather than a generic template copied from elsewhere.

What cyber security certification can an Irish company get?

The two most used are Cyber Essentials, a UK government-backed baseline for five technical controls, and ISO 27001, the international standard certified in Ireland by bodies such as NSAI. The NCSC has also announced a forthcoming Irish Cyber Security Measures Certification. ERS holds Cyber Essentials and guides clients through it. ERS does not hold ISO 27001.

What is the National Cyber Security Bill 2024 in Ireland?

It is the planned law that will transpose the EU NIS2 Directive and put the NCSC on a statutory footing. The General Scheme was published in 2024. As of 28 October 2026, the Bill had not been introduced in the Oireachtas, and the EU Commission had referred Ireland to the Court of Justice for the delay. Our NIS2 compliance guide tracks the status with sources.

What is Ireland's national cyber security strategy?

The current strategy is the National Cyber Security Strategy 2030, prepared by the Department of Justice, Home Affairs and Migration. It is built on three pillars: detect and defend, enhance national resilience, and strengthen Ireland's cyber ecosystem, and it includes specific measures to support SMEs. It follows the 2019 to 2024 strategy and sits alongside the National Cyber Security Bill.

What does a cyber security assessment or audit involve?

ERS's cyber security assessment services review your devices, Microsoft 365 tenant, network, backups, user accounts and policies against recognised controls, then give you a prioritised list of fixes. It includes vulnerability assessment, the kind of cyber security testing that finds unpatched and misconfigured systems. Our consulting and advisory work is practical: we then fix the issues and monitor them. For formal audits against ISO 27001, you need an accredited certification body.

What is a disaster recovery plan in cyber security?

It is the part of your business continuity plan that covers restoring systems and data after a cyber incident, such as ransomware. It sets out what gets restored first, from which backups, by whom, and how long each step should take. It must be tested. Our backup and disaster recovery service and ransomware guide explain how this works in practice.

How much does cyber security insurance cost?

There is no published average premium for Irish SMEs. Insurers price on turnover, sector, data held, the limit you choose and, increasingly, your controls: MFA, EDR, offline backups and training. Missing controls raise the premium or remove cover. Our guide to cyber insurance requirements in Ireland explains what insurers ask and how to evidence it.

Do financial and legal services firms need extra cyber security?

Often, yes. Firms holding client money or confidential files are prime targets for invoice fraud and mailbox takeover. Banks, insurers and other financial entities also fall under the EU's Digital Operational Resilience Act, supervised in Ireland by the Central Bank). Solicitors, accountants and other professional services firms should focus on MFA, email security and Microsoft 365 monitoring.

What do cyber security monitoring and managed services include?

With ERS, cyber security managed services combine 24/7 managed detection and response, Microsoft 365 identity monitoring, dark web monitoring, mobile device management and staff training, with monthly reports. Analysts check alerts before escalating, so your team is not flooded. As a managed service provider for cyber security, ERS works alongside your existing IT staff or runs your IT as well.

What Is Cyber Security and Why Does Your Business Need It?