Jobs · Information Technology · Illinois

Security Engineer

Optiver · Chicago, IL · 1 wk ago
On-siteInformation TechnologyFull-time

What you'll do

  • Monitor daily security operations, identify threats, investigate alerts, and respond to incidents across cloud and on-prem environments.
  • Maintain and tune security tools across AWS, Microsoft 365, endpoints, and network infrastructure.
  • Strengthen Microsoft 365 and Entra ID security through Conditional Access, MFA, PIM, Defender for Endpoint/Identity/O365, and tenant configuration hardening.
  • Implement and support data protection capabilities, including Microsoft Purview, sensitivity labels, DLP, and insider risk policies.
  • 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.
  • Work with AI and our AI engineering teams to ensure the security of the environment.
  • Perform vulnerability assessments, review system configurations, and develop practical mitigation strategies.
  • Conduct security reviews of systems, cloud workloads, and new technologies.
  • Ensure and assure our security controls are effective and working as intended.
  • Lead or contribute to incident response activities including investigation, containment, communication, and remediation.
  • Analyze logs, IOCs, and behavior patterns using SIEM tools and threat intelligence.
  • Work closely with engineering, technology, and business teams to embed security best practices.
  • Provide guidance on secure architecture, access controls, and identity management.
  • Support user education and uplift security behaviors across the business.

What you'll get

  • The opportunity to work alongside best-in-class professionals from over 40 different countries
  • A highly competitive compensation package including performance-based bonus structure
  • 401(k) match up to 50%
  • Comprehensive health, mental, dental, vision, disability, and life coverage
  • 25 paid vacation days alongside market holidays
  • Extensive office perks, including breakfast, lunch and snacks, regular social events, clubs, sporting leagues and more

Who you are

  • You are a hands-on security engineer with strong technical fundamentals and a passion for building secure, scalable systems.
  • You likely bring experience in several of the following areas:
    • Securing and supporting cloud environments, particularly AWS, including services such as IAM, GuardDuty, CloudTrail, Security Hub, AWS Config, and KMS.
    • Working with Microsoft security technologies including Entra ID, Conditional Access, Multi-Factor Authentication (MFA), Privileged Identity Management (PIM), Microsoft Defender, and Secure Score.
    • Using security tools such as EDR, SIEM, vulnerability management, SOAR, CASB, or related technologies.
    • Investigating security events, responding to incidents, and managing security risks across cloud and on-premises environments.
    • Managing identity and access controls, including RBAC, PAM, SSO, and federation technologies such as SAML, OAuth, and OIDC.
    • Supporting and securing Windows and Linux environments.
    • Applying networking fundamentals including TCP/IP, DNS, VPNs, proxies, and firewalls to secure enterprise systems.
    • Building automation and tooling using Python and/or PowerShell.
    • Integrating systems through APIs and working with version control systems such as Git.
    • Implementing or supporting data protection technologies such as Microsoft Purview, data loss prevention (DLP), classification, and information protection solutions.
  • You approach security challenges with an engineering mindset and prefer pragmatic, effective solutions to unnecessary complexity.
  • You look for opportunities to automate repetitive work through scripting, tooling, and emerging technologies, including AI-enabled security workflows.
  • You have hands-on experience in security engineering, security operations, or DevSecOps, with a track record of monitoring, incident response, and risk reduction.
  • You stay curious about evolving threats, cloud technologies, detection techniques, and emerging security trends.
  • You communicate effectively across technical and non-technical teams and can clearly articulate security concepts to a variety of audiences.
  • You are comfortable collaborating with engineers, infrastructure teams, and business stakeholders, and constructively challenge assumptions when needed.
  • You take ownership of problems from investigation through resolution and enjoy working in a fast-paced, highly collaborative environment.

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