Network Security Engineer – Palo Alto Firewall Management

Grant Thornton Advisors LLC and Grant Thornton Ireland (GT) have recently come together to form a powerful multinational, multidisciplinary platform that delivers premier advisory, tax, and independent audit services. With $2.7 billion in revenues and nearly 60 offices across the U.S., Ireland, the UAE, and other territories, our combined platform brings enhanced solutions and capabilities supported by cutting-edge technologies and a team of nearly 13,000 quality-driven professionals.

Grant Thornton Ireland contributes nearly 3,000 people across 9 offices in Ireland, the Isle of Man, Gibraltar, and Bermuda, and is part of a global network of over 68,000 professionals spanning more than 149 countries. Together, we offer a truly global reach backed by deep local knowledge and national expertise.

By joining forces, we strengthen our ability to act as trusted advisors who make business more personal — investing in relationships and empowering clients to make the right decisions for their organisations today and into the future. Whether working with the public sector to build thriving communities, partnering with regulators and financial institutions to build trust, or supporting diverse businesses to achieve their goals, Grant Thornton now provides a singular, seamless client experience grounded in collaboration, innovation, and a shared commitment to the issues that matter most.

At GT Ireland we don’t just predict your future, we build it.

A Career at GT

Looking for a more fulfilling role in professional services? One where fresh thinking, collaboration and diversity are valued? At Grant Thornton we do things differently.

What does this mean for you?

A career in a more inclusive working environment, a more collaborative work culture, a more supported, flexible working role, more possibilities to grow and more opportunities to help shape the future for your clients. We respect and value your experience. And we want you to bring your authentic self to work and be at your best. It is how it should be.

Grow With Us

At Grant Thornton, we care about our people and work hard to make you feel valued. If you are looking to deepen and develop your skills, knowledge, and experience throughout your career, then that is what you will get, and more.

Position Overview

We are seeking a highly skilled Network Security Engineer with expertise in Palo Alto firewall administration and network security to join our global security team. This role will be responsible for designing, implementing, and maintaining secure network environments that support our worldwide operations. The engineer will play a key role in protecting the organization’s infrastructure, applications, and data against evolving cyber threats while ensuring compliance with regulatory and internal security standards.

Key Responsibilities

Manage, configure, and maintain Palo Alto firewalls (on-premises and cloud) across global environments.
Implement and optimize firewall policies, NAT rules, VPNs, and security profiles to enforce enterprise security standards.
Monitor, analyze, and respond to firewall logs, alerts, and incidents in collaboration with SOC teams.
Conduct regular firewall audits, rule base reviews, and risk assessments to ensure secure and efficient configurations.
Support secure network design and architecture reviews for global projects, mergers, and technology deployments.
Collaborate with global IT, cloud, and application teams to ensure seamless and secure connectivity.
Assist with incident response by providing network security expertise during investigations and post-incident reviews.
Maintain documentation of firewall policies, configurations, and operational procedures.
Ensure compliance with corporate security policies, regulatory requirements, and industry best practices (ISO 27001, SOC 2, NIST, etc.).
Participate in on-call rotation to support 24/7 global operations.

Qualifications & Skills

Required:

Bachelor’s degree in computer science, Information Security, or related field (or equivalent experience).
5+ years of experience in network security engineering with strong hands-on expertise in Palo Alto Networks firewalls (PAN-OS, Panorama).
Solid understanding of TCP/IP, routing, switching, DNS, VPNs, and network segmentation.
Experience with GlobalProtect, App-ID, User-ID, and Threat Prevention modules.
Familiarity with SIEM, IDS/IPS, and network monitoring tools.
Strong troubleshooting and analytical skills with ability to work under pressure.
Excellent communication skills for working in a distributed, multicultural global team.
Palo Alto certifications (PCNSE, PCNSA).
Experience with cloud security (Azure, firewall and networking).
Knowledge of automation and scripting (Python, Ansible, Terraform) for firewall and network operations.
Solid understanding of TCP/IP, routing, switching, DNS, VPNs, and network segmentation.
Experience with GlobalProtect, App-ID, User-ID, and Threat Prevention modules.
Familiarity with SIEM, IDS/IPS, and network monitoring tools.
Strong troubleshooting and analytical skills with ability to work under pressure.
Excellent communication skills for working in a distributed, multicultural global team.
Palo Alto certifications (PCNSE, PCNSA).
Experience with cloud security (Azure, firewall and networking).
Knowledge of automation and scripting (Python, Ansible, Terraform) for firewall and network operations.

Preferred:

Exposure to Zero Trust architecture and secure access frameworks.

Life At Gt

Reward And Benefits:

Our reward and benefits are designed to create an environment where our people can flourish. We are committed to building a culture where our people have access to the necessary benefits to help promote a healthy lifestyle and thrive.

Equity, diversity and inclusion
At Grant Thornton, we provide equitable opportunities for all our colleagues. We are a responsible, sustainable business where equity, diversity and inclusion (ED&I) is at the forefront of our workplace culture agenda, and today, we continue to build and develop on our existing ED&I structure and strategy to meet our workplace culture needs. People are at the heart of our business and teams built with varied backgrounds, racial differences, cultures, sexual orientations, religious orientations, ages, gender identities, abilities and family types present diverse viewpoints, which need to be heard and valued.

We are all at our best when we are able to be ourselves and we view integrity and authenticity as integral values to bring to our day-to-day work-life at the firm. We are excited to see the personality and perspectives you will bring to our team because we know we will all benefit from them. Diversity of thought, background and experience enables better decision-making, improves the quality of our delivery, and helps us to meet the needs of our clients. Our firm is built on people and their ideas, so we want to hear all the new perspectives and fresh thinking you have to offer. You form the bedrock of our firm’s best-practice principles and we will champion you as leaders from day one.

Recognition:

We want to create a culture of recognition and celebrating success, by saying thank you to people who surpass our expectations and recognising the right values and behaviours. Our Shout Out recognition scheme is our way of highlighting and promoting achievements. Whether you simply want to say thank you, celebrate a special occasion or give an award for doing something exceptional, you can do all of this and more through the scheme.

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