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Johnson Controls

Network Security Engineer - Forescout

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What you will do

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.


This is a hands‑on operational role where your work directly improves network visibility, security posture, and user experience across the business.

How you will do it

Primary focus: Forescout NAC, Device Classification and Segmentation

  • 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)

Secondary focus: Infoblox DDI and Automation

  • Act as platform owner for Infoblox Universal DDI (BloxOne).

  • 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).

What we look for

Required

  • 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).

Our salary and benefits

The initial basic salary for this position will be in the range of €2,261 – €3,390 per month, plus a 13th month salary applied after your first 6 months in the job. The final package will reflect your experience, skills, and qualifications relevant to the role. We are committed to fair, equitable, and gender-neutral pay practices.

  • At Johnson Controls, your work comes with benefits that support both your career and your wellbeing.

  • 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

About Us

Johnson Controls, a global leader in thermal management, mission-critical building systems, energy efficiency, and decarbonization, helps customers use energy more productively, reduce carbon emissions, and operate with the precision and resilience required in rapidly expanding industries such as data centers, healthcare, pharmaceuticals, advanced manufacturing, and higher education.

For more than 140 years, Johnson Controls has delivered performance where it really matters. Backed by advanced technology, lifecycle services and an industry-leading field organization, we elevate customer performance, turn goals into real-world results and help move society forward.

We are committed to diversity and inclusion and believe that different perspectives make us stronger. By encouraging open dialogue and valuing individuality, we strive to be one of the most desirable places to work.

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