An Operational Technology (OT) security audit assesses the cybersecurity posture of industrial systems, networks, processes and supporting infrastructure. It is designed to identify vulnerabilities, security gaps and areas of risk across OT environments while taking account of operational availability, safety and continuity requirements. 

 OT environments often contain legacy systems, specialist equipment and critical processes that were not originally designed with modern cyber threats in mind. An OT security audit helps organisations understand where weaknesses exist, assess whether controls are effective and prioritise improvements that strengthen operational resilience. 

 The scope depends on the environment and objectives of the assessment, but an OT security audit may review network architecture, segmentation, system configurations, security controls, policies, governance, remote access, asset visibility, physical security and relevant operational processes. 

 An IT security audit focuses primarily on enterprise systems, applications, users and data. An OT security audit considers industrial systems and operational processes where availability, safety and production continuity are critical. Testing methods and recommendations must therefore reflect the specific constraints of operational environments. 

 An OT security audit provides a broader assessment of security posture, including architecture, policies, governance, controls and technical weaknesses. OT penetration testing is more focused on identifying and validating exploitable vulnerabilities through controlled testing. The two approaches can be complementary. 

 OT environments can be sensitive to traditional security testing techniques, so assessments must be carefully scoped and planned. Integrity360 tailors testing to the operational environment and works with relevant stakeholders to minimise unnecessary disruption while still providing meaningful security insight. 

 IT/OT network segmentation separates enterprise IT systems from operational technology environments using appropriate security controls and network architecture. Effective segmentation can help reduce the risk of attackers moving from compromised corporate systems into critical operational networks. 

 IEC 62443 is a series of international standards focused on cybersecurity for industrial automation and control systems. It provides guidance for organisations, system integrators and product suppliers on managing cyber risk and implementing appropriate security controls across industrial environments. 

 NIST SP 800-82 provides cybersecurity guidance for Operational Technology environments, including industrial control systems, building automation and other operational systems. It covers areas such as risk management, network architecture, access control and security monitoring while recognising the specific operational requirements of OT. 

 OT security audits should be conducted regularly and following significant changes to systems, architecture, processes or risk exposure. The appropriate frequency will depend on the organisation, sector, regulatory requirements and criticality of the environment, but periodic reassessment helps ensure that new exposures are identified and addressed. 

 OT security audits can be applied across a wide range of industrial and operational environments, including manufacturing, energy, utilities, transport, maritime, critical infrastructure and other environments that rely on industrial control systems and operational technologies. 

 Yes. Legacy systems are common in OT environments and may have outdated operating systems, unsupported software, weak authentication or limited security functionality. An audit can identify these risks and recommend compensating controls or other practical measures where immediate replacement is not possible. 

 Following the assessment, Integrity360 provides findings and prioritised recommendations based on the risks identified. These can help organisations address vulnerabilities, strengthen controls, improve segmentation and develop a practical roadmap for improving OT cybersecurity over time. 

 Yes. Integrity360 can assess OT security controls and processes against relevant regulations, recognised frameworks and industry standards depending on the organisation's requirements. This may include IEC 62443, NIST SP 800-82 and other applicable security or regulatory guidance.