Principal Network Security Engineer

Work with and lead talented people to achieve wonderful things at Liberty IT; for this is where you’ll find complex challenges, where you’ll be given the scope and the support to go further, dig deeper and fly higher.   

You’ll bring the expertise. We’ll provide the support and autonomy. 

Sound good? 

Read on for more information. 

Who you’ll be working with:  

Join the global Tier 3 Cybersecurity Engineering team who are transforming Liberty’s networking and firewall services, transitioning to cloud environments and Palo Alto firewalls. 

Experience and skills we need:  

• Extensive experience in designing, implementing and supporting Palo Alto firewalls 

• Experience in AWS and Terraform infrastructure services, using Java or Python for scripting or configuration purposes. 

• Current and valid industry recognised network or cybersecurity certifications 

• A minimum of 7 years Infrastructure, Network or Systems Engineering experience. 

• Experience in playing a lead role in transformation projects related to networking, firewalls or cloud infrastructure. 

• Experience in technical communication with peers and non-technical stakeholders.  

What you’ll be doing:  

• Contribute to the architecture and lead the delivery of networking solutions, including firewalls, in cloud environments. 

• Have a strong understanding of how the solutions you work on fit into the larger business market and organization, and use that to the set the direction of the project. 

• Work with customers to analyze their business problems, drive out requirements and deliver solutions that meet a real business need. 

• Participate in regular on-call, currently 1 in 7 weeks, as part of the tier 3 incident handling team. 

• Work as a technical lead across the whole delivery lifecycle, making decisions on technologies, and architecting and designing complex systems. 

• Direct, set and constantly review the processes and standards of the team to ensure the delivery of high quality, tested, well performing and secure solutions by the team. 

• Coach, mentor and provide feedback to team. 

• Take responsibility for the technical capabilities of the team, ensuring the whole team is continuously improving and learning together to meet current and future product needs. 

• Continuously develop your skills and knowledge 

• Share knowledge and expertise across your department, the wider organization or beyond through networks, events and communities of practice. 

What’s on offer  

• The opportunity to undertake flexible work patterns including compressed working and 4 day working weeks from your first day at Liberty IT. 

• Feel safe and secure whatever life brings, with health insurance (including access to a digital doctor), life assurance and income protection.  

• Enjoy both today and tomorrow with employee discount schemes, annual bonuses and a competitive pension.  

• Protect your wellbeing with flexible working and a real work-life balance. Specifically, we have adopted a hybrid working culture, meaning you have ultimate flexibility in your work environment.  

• Grow yourself, your career and reputation through continuous learning, promotion opportunities and our generous recognition programme.  

A little background on LIT  

Liberty IT is the tech wing of Liberty Mutual Insurance. Bringing peace of mind to all aspects of customer’s lives, every day.   

We’re an ideas company. Always. We thrive on engineering excellence and surpass with technical mastery. We build beautifully architected cloud solutions and reliably run high stability systems. We work alongside the best in the business and learn from the finest minds.    

• Great Place to Work in UK & Ireland 2025 

• Best Workplaces for Women (UK) 2024 

• Top 5 Best Tech Workplace   

• Centre of Excellence in Wellbeing   

Fair employment and equal opportunities   

Liberty IT is an equal opportunity employer, committed to inclusion and diversity.   

If you have a disability, accommodations are available on request when taking part in all aspects of the recruitment, assessment, and selection process.  

Now, it’s over to you.   

If you’re ready to fly in your career, apply now.