Information Security Engineer Job at Optiver (Sydney)

Information Security Engineer

Optiver

Location:
Australia , Sydney

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

We are seeking a motivated, hands-on Information Security Engineer to join our security team. In this role, you will help protect, monitor, and continuously improve the security of our global systems including cloud (AWS and M365) and on-premises infrastructure. You’ll play a central part in risk mitigation, incident response, automation of security operations, and embedding security best practices across our organisation. An engineering mindset, attention to detail, and a preference for pragmatic solutions are essential to keeping our systems operating.

Job Responsibility:

Monitor daily security operations, identify threats, investigate alerts, and respond to incidents across cloud and on-prem environments
Strengthen Microsoft 365 and Entra ID security through Conditional Access, MFA, PIM, Defender for Endpoint/Identity/O365, and tenant configuration hardening
Build and maintain security automation using Python and PowerShell, with a strong focus on reducing manual processes and improving detection and response
Integrate systems using APIs (Graph API, REST, etc) to enhance security workflows
Perform vulnerability assessments, review system configurations, and develop practical mitigation strategies
Contribute to incident response activities including investigation, containment, communication, and remediation
Work closely with engineering, technology, and business teams to embed security best practices

Requirements:

At least 2 years (5+ in more experienced roles) in an information security or technical engineering role
Ability to apply analytical thinking to technical problems within a fast-moving environment
Comfortable with both Windows and Linux environments
familiarity with common security technologies (firewalls, endpoint protection, log management, vulnerability scanning, network security)
Solid scripting skills in PowerShell and/or Python
Knowledge of secure Identity Management, authentication principles, and modern access control patterns
Experience using security tooling such as EDR, SIEM, SOAR, CASB, etc
Experience securing workloads running both on-premise (bare-metal / container) and on IaaS platforms
Familiarity with identity lifecycle processes, RBAC, PAM, and privileged identity controls
Understanding of vulnerability management tools (Nessus/Tenable, RunZero, etc) and secure configuration standards
Experience with data protection, DLP, or information protection solutions (e.g., Microsoft Purview, DLP rules, classification/labelling)

What we offer:

A performance-based bonus structure unmatched anywhere in the industry
The chance to work alongside diverse and intelligent peers in a rewarding environment
Training, mentorship and personal development opportunities
Daily breakfast, lunch and an in-house barista
Gym membership plus weekly in-house chair massages
Regular social events, including a company trip every two years

Additional Information:

Job Posted:
March 13, 2026

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