Tech Lead – OT Security & Network Access Control
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Monthly Salary:
Posted on:
15 hours ago
Vacancies:
1 Vacancy
Job Summary
Tech Lead OT Security & Network Access Control
Location: Poland - Hybrid
Contract: B2B Full-Time
Join the Future of Digital Tech with Kolomolo
At Kolomolo we dont just follow trends - we set them. As a global supplier of IT services and digital modernization solutions we help businesses embrace cutting-edge technology to optimize their operations. Now we are growing and looking for fresh talent to grow with us.
Are you proactive tech-savvy and eager to build your career in IT This role could be your perfect fit.
About the Role
We are looking for a Tech Lead OT Security & Network Access Control to take ownership of a modern OT security architecture focused on strong identity segmentation and zero-trust principles.
This role offers a rare opportunity to design and deploy a Network Access Control (NAC) ecosystem from the ground up securing thousands to millions of connected devices across operational networks while ensuring uptime and performance. You will act as both a technical authority and a hands-on leader guiding implementation and shaping long-term strategy.
What Youll Be Doing
Technical Leadership & Architecture
Own the design and rollout of a tiered trust OT security model based on NAC principles
Define security zones and access policies for heterogeneous device environments (industrial systems IoT third-party equipment)
Translate high-level security requirements into practical scalable network designs
NAC & Identity Implementation
Lead deployment of PacketFence NAC from pilot phases through full production
Implement certificate-based authentication using 802.1X (EAP-TLS) for trusted devices
Design and manage PKI workflows including certificate issuance renewal and revocation
Enable automated device identification and classification for non-certificate-based endpoints
Network & Integration
Design VLAN and segmentation strategies with dynamic assignment based on device posture
Integrate NAC with existing network infrastructure using RADIUS
Work closely with network platform and field teams to ensure smooth adoption
Governance & Documentation
Produce and maintain architecture diagrams configuration standards and runbooks
Support regulatory and compliance efforts including alignment with EU cybersecurity requirements
Contribute to security best practices and internal standards
People & Collaboration
Act as a mentor and technical reference for engineers
Collaborate across teams including cloud firmware operations and customer delivery
Provide clear guidance to both technical and non-technical stakeholders
What We Are Looking For
Must-Have
5 years of experience in network security NAC or identity and access technologies
Strong hands-on knowledge of 802.1X RADIUS and certificate-based authentication
Solid understanding of PKI concepts and certificate lifecycle management
Experience designing network segmentation using VLANs and access policies
Linux administration skills (Debian/Ubuntu-based systems)
Scripting and automation skills (Python Bash)
Ability to clearly communicate complex technical concepts
Nice-to-Have
Experience with PacketFence or similar NAC platforms (e.g. Cisco ISE Aruba ClearPass FortiNAC)
Exposure to OT / ICS security standards (IEC 62443 NIST etc.)
Experience with MikroTik RouterOS or similar network platforms
Knowledge of TPMs hardware-backed identities or HSMs
Background in IoT embedded systems or industrial environments
Familiarity with EU Cyber Resilience Act or related regulations
Technology Environment
NAC: PacketFence (open-source)
Networking: MikroTik routers and switches
Authentication: FreeRADIUS 802.1X (EAP-TLS)
PKI: Step-CA and PacketFence integrated PKI
Device Profiling: Fingerbank
Monitoring & Logging: Integrated with central SIEM/log platforms
Infrastructure: VMware / Proxmox Debian-based Linux systems
What is in It for You
Competitive salary and benefits
Career development opportunities in a growing tech company
Continuous learning culture: mentorship internal training and certifications
Flexible agile work environment (remote hybrid or on-site in Kraków
Office perks: great coffee tea fresh fruit snacks and a fun atmosphere
Flat management structure where your voice matters
Regular team events and a social supportive work culture
B2B contract or Contract of Mandate (Umowa Zlecenie)
Why Join Kolomolo
At Kolomolo we prioritize innovation agility and autonomy. Our teams have the freedom to own their work share ideas and make meaningful contributions. Inspired by Scandinavian values we believe in work-life harmony and creating an inclusive culture where everyone thrives.
You will be part of a passionate skilled and friendly team that works hard and celebrates together. Here you can build your career on your own terms with opportunities to grow learn and make a real impact.
Our Flat Structure & The Culture of Inclusion
At Kolomolo we break the corporate mold. We offer:
Agile Teams & Autonomy: No micromanagement. Youll own your projects and enjoy the freedom to innovate.
Work-Life Harmony: Inspired by Scandinavian values we prioritize balance and flexibility where remote work and asynchronous collaboration are in our DNA.
Learning & Growth: Continuous learning is at our core. We reward hard work value smart ideas and foster an environment of mutual respect and trust.
Inclusive Culture: We believe in DEI: diversity equity and inclusion. We are committed to creating an environment where every individual regardless of background identity or experience feels valued respected and empowered to thrive.
Join Kolomolo and elevate your career with cutting-edge technology a supportive team and a company that truly values your input.
Ready for the next step Apply now and start an exciting journey of growth and innovation with us!
Key Skills
- IDS
- Network security
- Active Directory
- Tcp/IP
- LAN
- Routers
- Windows
- Access Control
- Information Security
- Linux
- Troubleshoot
- Intrusion Detection
- Juniper
- Security Devices
- Dns
About Company
To be leaders in digital modernization by helping companies embrace latest cutting edge technologies to optimize their business with the help of our talented experts.
