Company:
Marsh

Description:

Senior IT Security Specialist

We are seeking a Senior Specialist – IT Security to join our team at Marsh. This role will be based in Mexico City. This is a hybrid role that has a requirement of working at least three days a week in the office. As a Senior Specialist – IT Security, you will join the Security Architecture team within Marsh’s Network & Security Infrastructure (NSI) organization. This role focuses on the governance, review, and approval of firewall security controls across a general enterprise environment. The position emphasizes control assurance, policy compliance, and thoughtful analysis of security controls, rather than day‑to‑day firewall operations.

We will count on you to:
- Review and approve firewall change requests submitted through formal change management processes.
- Assess firewall changes and existing rules for alignment with internal security requirements, architectural standards, and least privilege principles.




- Identify non compliant or higher risk changes and support resolution through established risk acceptance processes.
- Perform periodic and targeted reviews of deployed firewall rules to validate ongoing compliance.
- Analyze complex and layered rule sets, including understanding historical changes and prior design decisions.
- Provide security oversight for enterprise firewall environments, including Palo Alto Networks, cloud native firewalls, and Kubernetes based platforms.
- Maintain documentation and evidence to support governance, audit, and control assurance activities.
- Partner with network, cloud, and platform teams to provide clear, practical security guidance.
- Contribute to improvements in firewall governance processes through standardization and supporting tools.

What you need to have:
- 3–4 years of experience in IT security, network security, or a related discipline.
- Experience reviewing, assessing, or governing firewall rules in enterprise environments.
- Strong understanding of

📌 Senior IT Security Specialist (Ciudad de México)
🏢 Marsh Mclennan
📍 Ciudad de México