Network Security Engineer, Forescout

Johnson Controls

Network Security Engineer focusing on Zero Trust network access and Forescout NAC platform management at Johnson Controls. Protecting enterprise network and managing global network security operations.

Posted 6/21/2026full-timeBratislava • 🇸🇰 SlovakiaMid-LevelSenior💰 €2,261 - €3,390 per monthWebsite

Tech Stack

Tools & technologies

AWSAzureDNSIoTPythonServiceNowSwitchingTCP/IP

About the role

Key responsibilities & impact

Join Johnson Controls’ global Network Security Operations team and play a key role in protecting a large, complex enterprise network.
You’ll be the go‑to expert for Zero Trust network access, with a strong focus on Forescout NAC, while also owning parts of our Infoblox DDI environment.
Own day‑to‑day operations of the Forescout NAC platform globally.
Monitor platform health, troubleshoot issues, and ensure high availability.
Resolve network access incidents (802.1X, RADIUS, MAB, Guest access).
Identify, classify, and manage the lifecycle of 30,000+ unmanaged, IoT, and OT devices.
Enforce Zero Trust policies, including: MAC address whitelisting and exceptions, “Semi‑Trust” access rules, network segmentation (VLANs, ACLs).
Manage virtual appliances across Azure, AWS, and on‑prem environments.
Implement proactive monitoring and platform resilience.
Execute DNS changes and enable security features such as RPZ and DNS Traffic Control.
Work closely with the Global Network team within a clear RACI model (DNS operations only; DHCP/IPAM consumption).

Requirements

What you’ll need

Hands‑on operational experience with Forescout NAC.
Solid understanding of 802.1X, RADIUS, MAB, and core networking concepts (TCP/IP, VLANs, routing, switching).
Experience working in ITIL‑based operations (Incident, Change, Problem).
Strong troubleshooting mindset and ability to create clear operational documentation for L1/L2 teams.
Preferred Forescout certifications (FSCA / FSCP).
Experience with Infoblox Universal DDI (BloxOne).
Enterprise DNS and DNS security experience (RPZ, DTC).
Exposure to Zero Trust architecture and IoT/OT environments.
Automation experience (ServiceNow CMDB, PowerApps, Python, APIs).

Benefits

Comp & perks

Meal vouchers fully covered by the company.
Flexible benefits budget with access to 3,500+ options, including a MultiSport card, medical and wellness services.
Extra savings through retail and lifestyle discounts (Benefit+).
Allowance for the private kindergarten or nursery to support your family.
Flexible working hours and home office days (12 days per month with allowance).
Allowance for language courses, professional development support, and wellbeing support.
On site benefits: massages, distribution of fruits, yoga, psychologist, health month, various events with supporting groups (volunteering activities, branding activities).
Seniority benefits - extra monthly financial allowance, medical care and support, wellbeing day.
Relocation support with housing allowance if moving to Slovakia.

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Hard Skills & Tools

Forescout NAC802.1XRADIUSMABTCP/IPVLANsroutingswitchingautomationPython

Soft Skills

troubleshooting mindsetoperational documentationcommunication

Certifications

FSCAFSCP