Senior Information Security Engineer at Optiver

About the role

Optiver is on the lookout for a dedicated Senior Information Security Engineer to bolster the security framework of our global operations. This position entails the continuous monitoring, safeguarding, and enhancement of our cloud-based and on-premises infrastructure. You will play a crucial role in managing risks, responding to incidents, and advocating for security best practices across the organization.

Key facts

- Location: Sydney, Australia
- Engagement: Full-time
- Team: Technology

What you'll do

- Manage daily security operations, identifying threats, investigating alerts, and responding to incidents across both cloud and on-premises settings.
- Strengthen security measures for Microsoft 365 and Entra ID by implementing strategies such as Conditional Access, Multi-Factor Authentication (MFA), and hardening configurations.
- Create and oversee security automation solutions utilizing Python and PowerShell to optimize processes and improve detection and response capabilities.
- Enhance security workflows by integrating systems through APIs.
- Conduct thorough vulnerability assessments and system configuration reviews, devising effective strategies for mitigation.
- Engage in incident response activities, which include investigation, containment, and remediation efforts.
- Collaborate with engineering, technology, and business teams to promote and implement security best practices throughout the organization.
- Stay updated on the latest security threats and trends to ensure proactive measures are in place.
- Document security processes and incidents to maintain clear records and facilitate knowledge sharing.
- Provide training and support to team members and other departments on security protocols and best practices.




- Participate in security audits and assessments to ensure compliance with industry standards and regulations.
- Work closely with external vendors and partners to ensure the security of third-party integrations.

Requirements

- At least 5 years of experience in information security or a related technical engineering role.
- Strong analytical skills to effectively address technical challenges in a fast-paced environment.
- Proficiency in both Windows and Linux operating systems, along with familiarity with security technologies such as firewalls, endpoint protection, and vulnerability scanning tools.
- Solid scripting skills in PowerShell and/or Python for automation and process improvement.
- Understanding of secure identity management, authentication techniques, and modern access control methods.
- Experience with various security tools, including Endpoint Detection and Response (EDR), Security Information and Event Management (SIEM), Security Orchestration, Automation and Response (SOAR), and Cloud Access Security Broker (CASB).
- Knowledge of securing workloads in both on-premises and Infrastructure as a Service (IaaS) environments.
- Familiarity with identity lifecycle management, Role-Based Access Control (RBAC), Privileged Access Management (PAM), and privileged identity controls.
- Understanding of vulnerability management tools and secure configuration standards.




- Experience with data protection solutions and information security tools such as Microsoft Purview and Data Loss Prevention (DLP) rules.

Nice to have

- Certifications in information security, such as CISSP, CISM, or CEH.
- Experience in the financial services sector or with trading systems.
- Familiarity with cloud security frameworks and best practices.
- Knowledge of compliance standards such as ISO 27001, NIST, or GDPR.
- Experience with threat hunting and incident response methodologies.

Skills & tools

The ideal candidate will have experience with a variety of security tools and technologies, including but not limited to:

- Microsoft 365 Security
- Entra ID
- Python and PowerShell scripting
- EDR, SIEM, SOAR, and CASB solutions
- Vulnerability assessment tools
- Incident response frameworks
- API integration techniques

Practical notes

Optiver is committed to fostering a diverse workplace and encourages individuals from all backgrounds to apply. We are open to accommodating requests for reasonable adjustments during the application process. For any inquiries, please contact our recruitment team at

Joining Optiver means becoming part of a energetic and high-performing culture filled with innovative thinkers. You will have the chance to collaborate with talented colleagues on intricate challenges within the financial markets.

In exchange for your expertise, you will enjoy:

- A competitive performance-based bonus structure.
- Opportunities to work alongside diverse and intelligent peers.
- Access to training, mentorship, and personal development resources.
- Complimentary daily meals, including breakfast and lunch, along with in-house barista services.
- Gym membership and weekly chair massages.
- Regular social events, including a company trip every two years.

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📌 Senior Information Security Engineer (City of Sydney)
🏢 Optiver
📍 City of Sydney