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. The ideal candidate will design, implement, and operate secure network architectures across IT and OT infrastructures, ensuring high availability, resilience, and compliance with security best practices.
Requirements
- Design, implement, and operate secure network architectures across IT and OT infrastructures
- 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
