Cyber Security Engineer

About us Tactix-Sener is a result of a partnership between Tactix Group – one of Australia’s leading transport infrastructure advisory firms and Sener, one of Spain’s biggest private engineering and technology companies. This powerful combination makes Tactix-Sener the most comprehensive infrastructure advisory and delivery firm in Australia, with a portfolio of major public and private projects around the nation and globally. About the Opportunity Our Security business is focused on protecting our client's people, information, property, and reputation. We do this through a comprehensive approach to security planning, whether cyber security, physical security, or counterterrorism. Our Security team provides wide range of services including security governance, design, engineering, assurance, verification and validation to critical infrastructure clients. We are seeking a Cyber Security Engineer to join our growing team. If you are experienced in critical infrastructure, cyber security engineering, implementation, assurance and commissioning, this will be a perfect opportunity for you to contribute to some of largest infrastructure & cyber security projects. This role will form a crucial member of our security team, with a strong technical focus and an acumen to complete designs, manage system integration and deliver projects and support our leadership and client teams in achieving their security objectives and deliverables. These include delivering system integration projects, contributing to the design and architecture of security solutions, testing and validating security systems and interfaces, facilitating project risk workshops, supporting the implementation of multi-year security roadmaps, and ensuring compliance with regulatory, legislative, and technical standards. As a Cyber Security Engineer, you will be responsible for : System integration and delivery of security systems. Lead the development of security plans, policies, procedures, reports, and standards. Develop and review technical designs, system architectures, and engineering documentation. Implementation and commissioning of integrated security infrastructure across projects. Execute the planning, design, and implementation of technical controls, procedures, and policies associated with cybersecurity compliance and / or regulatory standards. Collaborate with internal and external stakeholders to align security delivery with project requirements. Conduct and facilitate security risk assessments and technical risk workshops for the OT environment. Manage subcontractors, vendors, and integrators to ensure technical and delivery performance. Develop system test plans, procedures and perform multi-level testing. Configure cyber security and network systems including network switches, firewalls, IDS, NMS, EDR, IAM, SIEM, BRS. Setting up VLANs, IP schemas, and verifying connectivity, during FAIT, FAT, and SAT phases. Conduct cyber security testing including commissioning and interface testing. Address on‑site integration tasks during post installation check‑out and partial acceptance. Assist with security hardening, IC‑SG integration, and pen testing / vulnerability assessments. Ensuring that cyber security requirements are met throughout the change management process during testing and commissioning. Qualifications and Experience : Tertiary qualification in Engineering, security, or a related field. At minimum 5+ years of critical infrastructure experience in the design, integration, and delivery of cyber security and network security systems. Demonstrated experience in managing complex system integration projects across cyber and network security domains. Knowledge of industrial control systems security standards and reference models (IEC / ISA 62443, NIST CSF). Familiarity with OT / IC technologies and / or environments. Skilled in configuring network equipment (switches, firewalls, routers, packet brokers). Specialise in SIEM configuration (creating ingestion pipelines, correlation rules, dashboards), IDS and Threat intelligence integration. Experienced in integration of SEIM, IDS, MISP, SOAR platforms to Active Directory, MFA, endpoint protection, and ticketing systems. Experienced in virtualization and backup solutions, including Veeam, Hyper‑V and Proxmox, VMware for virtualisation and infrastructure integration. In depth knowledge of security engineering principles, security control implementation, validation, and system life‑cycle practices. Proven experience with cybersecurity frameworks, including the development and implementation of security plans, policies, and standards. Experience in conducting cyber security threat and risk assessments. Solid understanding of system architecture and engineering documentation standards. Hands‑on experience in system configuration, testing, commissioning, and troubleshooting. Familiarity with project management methodologies. Proven ability to work with multidisciplinary teams, manage vendors and subcontractors, and liaise with both technical and non‑technical stakeholders. Strong analytical, communication, and leadership skills, with the ability to work both independently and collaboratively within multidisciplinary teams and effectively engage with technical and non‑technical stakeholders. Experience delivering security solutions in critical infrastructure such as transport, defense, energy, data centres or government sectors. Professional cyber and network security certifications are preferred. Holding a security clearance is preferred, and applicants must be either Australian citizens / resident or possess an eligible visa. What we offer A positive team culture, flexible working arrangements, opportunities to be part of unique and transformative projects while learning from industry experts. We are open to considering candidates based across Australia, with remote and hybrid options available. #J-18808-Ljbffr