Senior IT Security Specialist

Marsh; Mexico; On-site; MXN 800,000 - 1,000,000; Full time

Job summary

Marsh in Mexico City is seeking a Senior Specialist – IT Security to join our NSI Security Architecture team. This hybrid role focuses on governance, review and approval of firewall security controls across a global enterprise, emphasizing control assurance, policy compliance, and thoughtful security analysis rather than day-to-day operations.

You will review firewall changes, assess rules for alignment with security standards, and collaborate with network, cloud, and platform teams to provide

Qualifications

• 3–4 years of experience in IT 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.

Responsibilities

• Review and approve firewall change requests submitted through formal change management processes.
• Assess firewall changes and existing rules for alignment with security requirements, standards, and least privilege principles.
• Identify non-compliant or higher risk changes and support resolution through risk acceptance processes.
• Perform periodic and targeted reviews of deployed firewall rules to validate ongoing compliance.
• Analyze complex and layered rule sets, including historical changes and 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.

Skills

IT security

Firewall governance

Change management

Analytical skills

Communication skills

Attention to detail

Tools

Palo Alto Networks

Cloud native firewalls

Kubernetes

Job description

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 is committed to creating a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age, background, disability, ethnic origin, family duties, gender orientation or expression, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, or any other characteristic protected by applicable law.