
Senior Enterprise Security Engineer
CoStar Group
Pyrmont
17 Mar 2026
Senior Enterprise Security Engineer
Senior Cybersecurity Engineer needed to deploy and operate Microsoft Defender suite for enterprise security. Requires 5+ years engineering experience with 3+ years in security roles, expertise in Microsoft Defender, vulnerability management, and network security. Based in Pyrmont, Australia.
On-site
Full-time
Senior
Microsoft Defender
Endpoint Defender
Salary
Not specified
Core Qualifications
Technical (Must-have)
Microsoft DefenderEndpoint DefenderXDRDefender for IdentityApplication ControlFirewallSmartScreenAntivirusvulnerability managementAWS Network Firewall
Soft Skills
communicationcollaborationproblem solvingadaptability
Tools (Must-have)
Microsoft Defender for EndpointWizDefender Vulnerability ManagementRapid7 InsightVMAWS Transit GatewayPalo Alto FirewallsDefender for Cloud AppsZscaler SASEZscaler Internet AccessZscaler Private Access
Preferred Qualifications
Technical (Nice-to-have)
TerraformPerlPythonPowerShellAzure DevOpsAgile Development
Tools (Nice-to-have)
NessusRapid7
Key Responsibilities
- Design, implement, and manage Microsoft Defender solutions to protect against various cyber threats.
- Ensure proper configuration and deployment of Microsoft Defender for endpoint protection.
- Collaborate with cross-functional teams to integrate Microsoft Defender into the overall security framework.
- Configure and manage the Microsoft Defender Firewall to protect network traffic and prevent unauthorized access.
- Utilize SmartScreen to enhance protection against phishing and malicious websites.
- Develop and enforce USB restriction policies to mitigate the risks associated with unauthorized external devices.
- Implement and manage controls to monitor and regulate USB device usage across the organization.
- Deploy and maintain Application Control solutions to enhance application security.
- Define and enforce application control policies to prevent unauthorized applications and code execution.
- Participate in security incident response activities, leveraging Microsoft Defender capabilities to detect, investigate, and remediate security incidents.
- Collaborate with incident response teams to enhance the organization's overall security posture.
- Collaborate with cross-functional teams to ensure timely vulnerability identification and remediation.
- Conduct regular vulnerability assessments using industry-leading tools and techniques, and analyze the results to identify critical vulnerabilities and potential risks.
- Stay up-to-date with the latest security vulnerabilities, emerging threats, and industry best practices, and assess their potential impact on our systems and networks.
- Provide recommendations for security controls and measures to prevent or mitigate vulnerabilities based on industry best practices and regulatory requirements.
- Provide engineering expertise to ensure changes to the enterprise network are designed and implemented in a secure manner.
- Evaluate firewall change requests – both on-premise and in the cloud.
- Design, enforce, and audit policy for various blades of a Next Generation Firewall, load balancers, routers, switches, Wi-Fi controllers, etc.
- Follow, develop, and improve network and security configuration policies, standards, and procedures.
- Assist with the move towards a zero-trust methodology.
- Operate network filtering tools such as ZScaler Internet Access and Microsoft Defender for Cloud Apps.
- Administer email security platforms to filter malicious mail.
- Create comprehensive documentation for implemented security solutions, including configuration details, best practices, and troubleshooting guides.
CybersecurityEnterprise SecurityMicrosoft DefenderVulnerability ManagementNetwork SecurityCloud SecurityAWSReal EstateIT ServicesSenior