Senior Security Analyst at Brookfield Asset Management | GB | Rezi

Senior Security Analyst at Brookfield Asset Management

Senior Security Analyst

Brookfield Asset Management · GB

2 weeks ago

Senior Security Analyst

Brookfield Asset Management · GB

20 days ago
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About the Role

The Senior Security Analyst - Security Operations & Assurance is a senior security generalist responsible for supporting day-to-day security operations and responding flexibly to evolving business and security priorities. The role leads the investigation and resolution of complex security alerts and incidents while providing hands-on administration and support across various security platforms.

Responsibilities

  • Investigate and respond to security alerts from Microsoft Sentinel, Microsoft Defender XDR, endpoint security tools, and other monitoring platforms.
  • Manage security incidents, approvals, and service requests in ServiceNow.
  • Manage the security mailbox independently, investigating user-reported security concerns.
  • Administer Zscaler Internet Access, Zscaler Private Access, and Zscaler Client Connector.
  • Review Zscaler web, firewall, DNS, and access logs and implement approved changes.
  • Administer email-security controls across Microsoft Defender for Office 365, Exchange Online, and Abnormal Security.
  • Perform message tracing, quarantine review, tenant allow/block administration, and policy tuning.
  • Administer assigned Microsoft security platforms, including Microsoft Defender XDR, Microsoft Sentinel, Microsoft Entra ID, and Microsoft Purview.
  • Support the secure adoption and operation of approved artificial intelligence and generative AI services.
  • Administer and monitor security controls governing access to AI applications.
  • Identify and investigate unauthorized or shadow AI usage and AI-related security events.
  • Use approved AI-enabled security capabilities to improve investigation, detection, and workflow automation.
  • Review and maintain Conditional Access, multifactor authentication, privileged access, role-based access control, and access-review configurations.
  • Operate the enterprise vulnerability-management lifecycle.
  • Escalate critical and actively exploited vulnerabilities, coordinate time-sensitive remediation, and track vulnerabilities through closure.
  • Lead phishing simulation and security-awareness activities.
  • Execute legal hold and eDiscovery requests using Microsoft Purview.
  • Conduct and coordinate vendor and third-party risk assessments.
  • Provide operational input into security policies and standards.
  • Maintain security procedures, investigation playbooks, operational dashboards, metrics, and platform documentation.
  • Participate in a scheduled information security on-call rotation.

Requirements

  • Five or more years of progressive experience in information security, security operations, incident response, or a related discipline.
  • Hands-on experience investigating security alerts and managing incidents through ServiceNow or an equivalent workflow platform.
  • Experience administering enterprise security technologies and implementing approved security-policy changes.
  • Hands-on experience with Zscaler, Microsoft Defender XDR, Microsoft Sentinel, Microsoft Entra ID, Microsoft Purview, Exchange Online security controls, or comparable platforms.
  • Experience operating or supporting a vulnerability-management program, including prioritization, remediation coordination, exception handling, and reporting.
  • Experience supporting email security, identity controls, security awareness, third-party risk, policy implementation, or access reviews.
  • Experience supporting significant incidents and working within formal escalation and on-call procedures.
  • This position participates in a scheduled after-hours on-call rotation and may be required to provide timely support during significant security incidents, critical vulnerabilities, or other urgent security events.

Skills

  • Security operations
  • Alert triage
  • Incident response
  • Containment coordination
  • Queue management
  • Investigation documentation
  • Zscaler Internet Access
  • Zscaler Private Access
  • Zscaler Client Connector
  • SASE
  • Zero Trust concepts
  • Microsoft Defender XDR
  • Microsoft Sentinel
  • Microsoft Entra ID
  • Microsoft Purview
  • Microsoft 365 security controls
  • Vulnerability risk
  • Exploitability
  • Compensating controls
  • Remediation prioritization
  • Risk acceptance
  • Email-security controls
  • SPF
  • DKIM
  • DMARC
  • Email-based attack techniques
  • Documentation
  • Communication
  • Analytical judgment
  • Cross-functional coordination
  • Ability to work independently
  • Adapt to changing priorities
  • Take ownership of unfamiliar issues
  • Operate effectively during urgent events
  • AI-security risks
  • Generative AI technologies
  • Data-protection considerations
  • Shadow AI monitoring
  • Secure use of AI-enabled security capabilities
  • PowerShell
  • Python
  • APIs
  • Workflow automation

Location

  • London - One Canada Square, Level 25

Work Type

  • Full-time

Experience Level

  • Senior

Education Level

  • Post-secondary education in cybersecurity, information technology, computer science, or a related discipline, or equivalent practical experience.

About the Company

  • Technology Services (TS) is responsible for delivering all enterprise infrastructure, applications and related end user technology services across all Brookfield business groups.
  • Brookfield has a unique and dynamic culture. We seek team members who have a long-term focus and whose values align with our Attributes of a Brookfield Leader: Entrepreneurial, Collaborative and Disciplined. Brookfield is committed to the development of our people through challenging work assignments and exposure to diverse businesses.

Equal Opportunity

  • Brookfield is committed to maintaining a Positive Work Environment that is safe and respectful; our shared success depends on it. We do not tolerate workplace discrimination, violence or harassment. We are proud to be an Equal Opportunity Employer and make employment decisions based on qualifications, merit and business needs, without regard to any characteristic protected by applicable law. Applicant information is collected and handled in accordance with our Applicant Privacy Notice.