Senior Security Engineer - NGFW, NAC & OT

Help AG is looking for a highly skilled Senior Security Engineer with strong expertise in network security, firewall technologies, NAC solutions, and OT/ICS environments.

Requirements

• Act as an on-site cyber security expert to design, implement, and manage enterprise and industrial network security architectures.
• Deploy and support FortiGate Firewalls with HA, VDOMs, IPS, AV, SSL inspection and VPNs.
• Configure, manage, and troubleshoot Cisco Firepower Threat Defense (FTD) using FMC.
• Implement and maintain FortiNAC for network access control, device profiling, onboarding, and segmentation.
• Perform advanced troubleshooting across routing, switching, and security layers.
• Support LAN/WAN networks using Cisco and multi-vendor platforms.
• Implement VLANs, trunking, STP, HSRP/VRRP, and multicast where required.
• Support high availability and redundancy designs.
• Secure Operational Technology (OT) environments including SCADA, PLCs, DCS, and industrial networks.
• Design IT–OT network segmentation using firewalls, zones, and DMZ architectures.
• Apply security controls aligned with IEC 62443, NIST, and ISA standards.
• Understand industrial protocols such as Modbus, DNP3, OPC, Profinet, EtherNet/IP.
• Support risk assessments and mitigation strategies for critical infrastructure.
• Monitor, analyze, and respond to security incidents and network outages.
• Conduct firewall rule reviews, audits, and optimization.
• Participate in root cause analysis (RCA) and post-incident reporting.
• Provide Tier-3 escalation support and mentorship to junior engineers.
• Create and maintain network diagrams, security standards, and SOPs.
• Support compliance requirements and security audits.
• Collaborate with IT, OT, SOC, and application teams.

Benefits

• Health insurance with one of the leading global providers for medical insurance.
• Career progression and growth through challenging projects and work.
• Employee engagement and wellness campaigns activities throughout the year.
• Excellent learning and development opportunities.
• Annual flight tickets to home country.
• Inclusive and diverse working environment.
• Flexible/hybrid working environment.
• Open-door policy.