Marsh
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 global 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 network security concepts, segmentation, and access control.
- Experience working within formal change management or ITSM processes.
- Strong analytical skills with a high level of attention to detail.
- Ability to investigate and interpret complex configurations and layered historical changes.
- Effective communication skills and a strong internal client service orientation.
What makes you stand out:
- Broad security awareness across network, cloud, and platform security domains.
- Experience supporting security assessments, control reviews, or audit related activities.
- An inquisitive mindset with the ability to ask thoughtful questions and challenge assumptions constructively.
- Familiarity with scripting, APIs, or AI assisted tools to support analysis or governance activities.
- Security certifications such as CISSP, PCNSE, or cloud security certifications (AWS, Azure, GCP).
Why join our team :
- We help you be your best through professional development opportunities, interesting work and supportive leaders.
- We foster a vibrant and inclusive culture where you can work with talented colleagues to create new solutions and have impact for colleagues, clients and communities.
- Our scale enables us to provide a range of career opportunities, as well as benefits and rewards to enhance your well-being.
Marsh (NYSE: MRSH) is a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of over $27 billion and more than 95,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit corporate.marsh.com, or follow us on LinkedIn and X.
